U.S. Grains Council – Importer Manual, Chapter4
U.S. Grains Council – Importer Manual, Chapter 4
Grain Quality and U.S. Standards
One of the major strengths of the U.S. grain production and
marketing system is the variety of grades, classes and prices that it
can offer customers around the world. Dramatic differences in
topography, soils and climate from one region to another make this
variety possible. By building on these natural advantages, seed
breeders, public and private researchers, farmers, grain handlers and
merchandisers are continually seeking to expand both the type and
quality of grain the United States can make available to its
The ability to provide such a broad spectrum of agricultural products
gives buyers the opportunity to purchase exactly what they want. In
the U.S. marketing system, quality requirements for grain exports
are governed by both contract specifications and a complex,
constantly evolving government-regulated system of guidelines that
cover the inspection, sampling, grading and weighing of grain.
These grain standards and inspection procedures are designed to
ensure a uniform product and to facilitate the trading and marketing
of U.S. grain.
FEDERAL GRAIN INSPECTION SERVICE
The Federal Grain Inspection Service (FGIS) is a program of the
U.S. Department of Agriculture’s (USDA) Grain Inspection,
Packers and Stockyards Administration (GIPSA). FGIS administers
a system for officially inspecting and weighing grain and other
commodities through 12 field offices and two federal/state offices in
the United States and Canada. FGIS field offices also oversee the
work of state and private agencies which provide official services at
other domestic grain markets. Eight of these state agencies are also
authorized to perform official export services at ports.
The U.S. Grain Standards Act, with few exceptions, requires official
certification that export grain sold by grade has been inspected and
weighed. Official services are provided upon request for grain in
domestic commerce. The Agricultural Marketing Act of 1946
authorizes similar inspection and weighing services for rice, pulses
and certain other commodities.
Congress passed the U.S. Grain Standards Act in 1916 at the request
of local trade and governments that wanted a national inspection
program and, for the first time, a national weighing program.
The U.S. Grain Standards Act provides for the establishment of
official U.S. grain standards that are used to measure and describe
the physical and biological properties of the grain at the time of
inspection. The grades, classes and conditions reported on official
certificates are determined according to the factors defined in these
standards. These factors may include test weight per bushel and
percentages, by weight, of damaged kernels, foreign material,
broken kernels and other factors. The certificate also notes specific
conditions of the grain, such as moisture content and infestation. No
seasonal adjustments are made on U.S. grades.
Standards exist for 12 grains (listed from largest to smallest volume
inspected): corn, wheat, soybeans, sorghum, barley, oats, rye,
flaxseed, sunflower seed, canola, triticale and mixed grain.
Commodities such as rice, pulses and hops have similar standards
for grade and quality factors.
Other commodities and a wide range of processed products,
including flour, food mixes, edible oils and other cereal food
products, have no official USDA standards. FGIS can perform the
physical, chemical and microbiological tests - using the official
laboratory methods of the Association of Official Analytical
Chemists - requested in laboratory specifications.
Standards used to inspect grain and other agricultural commodities
are updated regularly through public rule-making procedures and
represent currently accepted market practices.
With a few exceptions, the official inspection of export grain is
mandatory. Official personnel employed or licensed by FGIS obtain
representative samples using approved equipment. The grade is
reported on a certificate which represents the entire lot inspected.
U.S. Grains Council – Importer Manual, Chapter 4 44
Other services available upon request include the determination of
protein and falling numbers in wheat, oil in sunflower seed and
aflatoxin in corn. FGIS performs stowage examinations within 24
hours before loading to assure that carriers are clean, dry and fit for
loading. FGIS is required by law to collect fees that cover the cost of
FGIS also works closely with other U.S. government agencies. For
example, if FGIS were to find excessive levels of aflatoxin in corn,
this would be reported to the Food and Drug Administration (FDA)
for action to prevent the cargo from entering commercial channels.
FGIS also works closely with the Animal and Plant Health
Inspection Service (APHIS) to report insects found during
inspection when the importing country has specified phytosanitary
restrictions. The cooperation between U.S. government agencies is
designed to assure that overseas customers receive the quality of
There are some unofficial, private inspection agencies in the
commercial business of providing inspection services or quality
information, such as trace metal analysis, mycotoxin testing for
other than aflatoxin, and testing for zearalenone and T-2 toxin using
methods governed by the American Association of Cereal Chemists
and other similar entities. FGIS does not have any authority over
unofficial agencies, and the certificates issued by unofficial agencies
are not FGIS certificates.
Before FGIS can establish, revise or repeal any of its standards,
rules and regulations, it is required by law to announce its intentions
in the Federal Register. The Federal Register is a publication that
records all changes or proposed changes in federal regulations.
These changes must be published and the public offered opportunity
for comment before they go into effect. FGIS sends copies of FGIS
Federal Register notices and proposals electronically to the
agricultural offices of U.S. embassies worldwide, and will send any
of its Federal Register announcements to anyone who requests
them. The agency also publishes its Federal Register actions in
A Federal Register announcement includes a description of the
action, rules the action would replace or affect, the effective date,
reasons for taking action, objectives and effects of the action and an
impact analysis (for major regulations). The announcement also
includes the identification and addresses of FGIS contacts, a
summary of the comments received on previous announcements and
text or amending language to be used as text of the regulation or
U.S. Grains Council – Importer Manual, Chapter 4 45
action. The final rule includes exact language amending the
Changing the grain standards is a lengthy process, requiring at least
one year from initiation until implementation. The public is given
the chance to comment throughout the rule-making process,
1. Before rule-making at preliminary public and private
meetings, or in writing to agency officials whenever an
individual, company or group has a concern;
2. During the comment period published in the Federal
Register notice to change or establish a standard;
3. During the comment period published in the Federal
Register "Proposed Rule."
FGIS usually allows a 60-day comment period for Federal Register
actions that would change or establish a standard, and FGIS may
allow additional time for comment to parties who request an
extension. Oral and written comments should be addressed to the
contact identified in the Federal Register. FGIS has a special e-mail
address, published in the Federal Register, which can be used for
submitting comments. Changes to the standards usually take effect
one year after publication.
With few exceptions, official weighing is mandatory for all grain
exported from the United States. During weighing operations,
technicians employed or licensed by FGIS observe and verify the
weighing and loading of grain and monitor scales and grain flow
security. The weight may be certified separately or included on the
official inspection certificate. "Class X," or official supervision of
100 percent of the weighing process, is required on export grain.
The scales used for the official weighing of grain and commodities
must be installed and operated under FGIS guidelines. Scales at
export elevators are tested every six months and must remain
accurate to the nearest one pound per 1,000 pounds. Accuracy of the
standard weights used to calibrate scales is verified every three
years, or as needed.
In addition to scale testing, FGIS calibrates 13 railroad master track
scales to the National Bureau of Standards’ official track scale under
an agreement with the American Association of Railroads. These
master scales calibrate track scales across the United States.
U.S. Grains Council – Importer Manual, Chapter 4 46
HOW GRAIN IS WEIGHED
Most U.S. grain is weighed on an electronic weighing system. The
system consists of a load receiving element (i.e., weigh hopper,
platform, etc., with load cells), an indicating element (i.e., digital
instrument), a printer and the associated material handling
equipment. The load cell senses the amount of the applied load in
the load receiving element and produces an output voltage that is
sent to the digital instrument. The digital instrument converts the
output voltage into a digital display. The tape printer records the
digital display onto a tape or ticket for a permanent record.
There are two types of electronic scales: levertronic and full
electronic. Levertronic scales are mechanical scales that have been
converted to electronic scales by inserting a load cell into the lever
system. The dial used to obtain and print a weight is replaced with a
digital instrument and printer.
Full Electronic Scales
In full electronic scales, the load receiving element is either
supported by, or rests on, the load cells.
Digital Instrument with Printer
Digital instruments, printers and control boards are located in the
control room. The control room is the operations control center for
the export elevator. It may be located in the elevator or in a building
separated from the elevator.
A digital instrument may have some sort of control that allows the
operator to manually or automatically operate the gates of the
garners and the scale. In the manual mode, the operator controls the
operation of each cycle; in the automatic mode, the scale cycle
repeats in succession.
Elevator personnel control equipment with computer graphical
displays interfaced to equipment in the elevator. FGIS monitors
grain flow with these same graphical displays. Elevator personnel
can control bin selection, tripper movement, diversion points, legs,
conveyor belts, slides and gates from this board. Official weighing
personnel monitor export grain flow after weighing and sampling to
assure that all of the grain weighed and sampled is actually delivered
to the vessel.
In supervising manually operated electronic weighing systems, the
official weigher continually verifies that the weight value displayed
on the digital instrument is the same as the printed value on the scale
tape of the ticket to assure proper system operation and to detect any
The weight of each draft is added to determine the sublot total. The
official weigher records the number of the sublot on the tape and
initials the total weight. When the tape is removed from the printer,
the official weigher records the time, carrier identification, kind of
grain, tape number and scale numbers. If this information is printed
on the tape automatically, the weigher verifies the accuracy of the
information and initials it.
Since 1989, FGIS has been encouraging export elevators to install
automated systems to monitor grain flow paths, maintain weight
records, and activate alarms and shut-down devices, if necessary.
Such systems can monitor flow paths more diligently than humans
and are less likely to record erroneous weights. In addition, they can
prompt personnel to perform scale checks and reduce the need for
inspection personnel to visit sites inside the elevator. As entering the
elevator always involves some risk, an automated system improves
safety. The elevator benefits because a properly functioning
automation system allows FGIS to operate with a smaller inspection
team, and hence charge smaller fees. The elevator is responsible for
contracting for the design and installation of the official automated
system because it must be integrated with the elevator’s own control
system. FGIS advises the elevator and contractors during the
development of the system, and carefully checks out the system for
security and functionality before approving its use. FGIS assumes
control of the automated system after its approval. Repairs and
upgrades are made by the elevator’s automation contractor, but must
be approved beforehand and checked out afterward by FGIS.
In order to be officially graded, grain must be inspected according to
the provisions of the U.S. Grain Standards Act. This means that the
equipment and procedures used must be approved and checked
regularly for accuracy and that inspectors must be tested for
proficiency in carrying out their inspection duties. The U.S.
Congress has given FGIS responsibility for carrying out this work.
There are five basic operations performed when officially inspecting
and weighing grain going aboard a ship: stowage examination,
sampling, weighing, inspection and certification.
U.S. Grains Council – Importer Manual, Chapter 4 48
A stowage examination is an inspection that determines if a carrier
is fit to receive grain. To be considered fit, the carrier's stowage area
must be clean, dry, free of odor and infestation and otherwise
suitable for receiving or storing grain, insofar as the suitability may
affect the quality, quantity or condition of the grain.
To determine cleanliness, stowage space is examined for:
1. Previous Cargo. If the stowage space contains fertilizer, old
grain, loose cement, coal, lime, dunnage, refuse or other
debris, the space is declared unfit for loading.
2. Rust Scale and Paint Scale. Rust scale and paint scale must
be checked to see if they could become dislodged from the
carrier and contaminate the grain. Loose scale will break
when struck with a fist or when light pressure is applied with
a knife blade under the edge of the scale. The use of safety
goggles is recommended when scraping rust or similar
material. Rust scale should not be confused with oxidation
rust, which forms on exposed metal surfaces. Oxidation rust
will not flake off when light pressure is applied. For ships,
the area is declared unfit when a single area of loose rust
scale or paint scale is more than 25 square feet
(approximately 2.3 square meters), or several patches of
loose rust scale or paint scale together exceed 100 square
feet (approximately 9.3 square meters).
3. Unsanitary conditions. If the stowage space contains any
animal filth, rodent excreta, bird excreta, decaying animal or
vegetable matter, sewage or any other unsanitary conditions,
the space is declared unfit for loading. Sites close to the
hatch (e.g., ship deck, top side of the hatch cover) also must
4. Unknown substances. If any unknown substances are
found, the space is declared unfit for loading. All unknown
substances are considered contaminating. FGIS does not try
to identify them but, if possible, FGIS will take samples of
the substance and show them to the supervisor for future
To determine dryness, the stowage space is examined for hydraulic
fluid, standing water, puddles or any amount of leaking water; if any
of these are present, the space is declared unfit for loading.
U.S. Grains Council – Importer Manual, Chapter 4 49
Condensation, commonly called "sweating," can form on bulkheads
or lower decks. This is unavoidable and poses no threat to the grain.
If the stowage space is contaminated with the odor of petroleum, an
oil-based chemical, decaying animal or vegetable matter, or any
other commercially objectionable foreign odor, the space is declared
unfit for loading.
Finally, the stowage space is examined for infestations of rodents
and/or insects. The discovery of any live rodents or more than two
live insects injurious to stored grain will result in the space being
declared unfit for loading.
Moisture: The moisture content in the grain is determined by a
standardized DICKEY-john Grain Analysis Computer GAC2100.
Moisture does not influence the numerical grade or any special
grades. However, it is determined on all shipments and reported on
the official certificate.
The sample requirement is approximately 350 grams, but the
GAC2100 does not require weighing a portion size. Pour the sample
through the divider at least once (to mix the sample) before filling
Handle all cold samples quickly to reduce the possibility of
condensation in a warm room. Samples on which snow or ice has
melted or which contain snow or ice, are unsuitable for moisture
testing. The built-in GAC2100 instrument temperature range limit is
10-40 degrees Celsius (50-104 degrees Fahrenheit). The sample
temperature range limit is 0-40 degrees Celsius (32-104 degrees
Fahrenheit). The sample-to-instrument temperature difference limit
is 20 degrees Celsius (36 degrees Fahrenheit). If the instrument finds
any of these limits exceeded, it will not display moisture results.
Keep all samples in sealed moisture-proof containers if they cannot
be tested within approximately 15 minutes. Do not use paper bags,
fiber cartons, or similar containers that allow moisture losses. Use
metal cans, plastic containers and plastic bags to preserve the sample
integrity. Do not file samples with paper identification inserted in
the grain. Paper absorbs moisture and lowers the moisture of the
Paper bags, fiber cartons and so forth are not used as moisture
sample containers. Containers found to be the most practical for use
in determining moisture are moisture-proof, plastic 475-ml
U.S. Grains Council – Importer Manual, Chapter 4 50
containers with openings of approximately 45 mm. Paper
identification should not be inserted in the grain samples.
Because of wide variations between room and grain temperatures
throughout the year, it is not possible to predict exactly how long
after the thermometer has been inserted into the grain that the
temperature should be read. Generally, three to five minutes is
sufficient to obtain an accurate temperature.
Dockage: Dockage is a factor determined for barley, flaxseed, rye,
sorghum, triticale and wheat, but not for other grains. Dockage
consists of material which can be easily removed by machine and
includes material lighter than, larger than and smaller than the grain.
Dockage is determined with a special machine called the Carter
Dockage Tester, which uses aspiration (air) and a combination of
riddles and sieves to remove materials lighter or of a different size
than the grain. The flow chart below describes the testing process.
Like moisture, dockage does not influence the numerical grade of
the grain, but it always is determined and reported on the certificate.
After dockage is removed, a portion of the sample is manually
examined for foreign material, which is all material remaining in the
sample other than the predominant grain. Foreign material includes
materials which could not be separated mechanically, such as seeds
and other grains similar in size and weight to the grain.
The Dockage Tester also is used to determine the percentage of
broken corn and foreign material in corn. Broken corn and foreign
material is a grading factor in corn.
Test weight per bushel: Test weight per bushel is the weight of the
grain required to fill a level Winchester bushel measure
(approximately 35.2 liter capacity). The factor "test weight per
bushel" is determined using an approved apparatus which has a
kettle capacity of 1 dry quart (approximately 1.1 liters). This
determination is made on a representative portion of grain, not less
than 1 1/8 to 1 1/4 quarts (1.2 to 1.4 liters) cut from the
representative sample using a Burner divider.
Test weight per bushel is a grading factor. Generally, it is expressed
in pounds per Winchester bushel, but upon request it will be
converted to kilograms per hectoliter.
To determine test weight, the work sample is poured into the closed
hopper which is centered over the kettle. The valve is opened to
allow the grain to fill the kettle. A standard stoker held in both hands
with the flat sides in a vertical position is used to remove the excess
grain from the top of the kettle with three full-length, zigzag
motions. The kettle is hung on the beam, and the beam weights are
moved until the beam is perfectly balanced. Then the test weight per
bushel is read.
Detailed grades and standards for barley ensure that importers
receive exactly the type and quality of barley that they want. There
are over 100 varieties of barley grown commercially in the United
States and an importer can specify an order detailed as to an
individual variety if needed.
For most importers, simple grade specifications will suffice to
guarantee the buyer gets exactly what is needed. A typical barley
requirement will define the grade (No. 1 through sample grade), the
type (two-row or six-row barley), the minimum or maximum protein
level, moisture levels, test weight and foreign material tolerances. If
the barley is being purchased to make malt, germination and
plumpness levels should be contractually stipulated.
Barley is an excellent feed grain for growing and finishing livestock
animals. The relatively high protein content in barley reduces the
need to supplement feed rations with high protein additives, which
reduces the cost of that ration. Differences between barley varieties
U.S. Grains Council – Importer Manual, Chapter 4 52
have little effect on animal performance; both feed and malting
varieties have proven to be excellent animal feed. Barley is divided
into three classes based on kernel characteristics: six-row barley,
two-row barley and barley. The class barley has no subclasses; six-
row barley and two-row barley are divided into subclasses based on
their malting qualities.
Six-row malting barley is divided into three numerical grades, and
two-row malting barley is divided into four numerical grades. All
classes on barley not designated as "malting" are divided into five
numerical grades and U.S. Sample grade. Special grades are
provided to emphasize special qualities or conditions affecting the
value of barley and are added to and made a part of the grade
designation. They do not affect the numerical or sample grade
designation. In general, a kernel of barley is considered damaged for
inspection and grading purposes only when the damage is distinctly
apparent and recognized as damaged for commercial purposes.
Blight-damaged kernels are kernels and pieces of barley kernels that
are covered at least one-third or more with fungus or mold. Blight
discolorations should not be confused with badly stained, weathered
or water-stained kernels or kernels that have black discoloration on
the tip of the germ end due to weather conditions. Barley containing
more than 4 percent of blight-damaged kernels is designated
Malt-damaged kernels are kernels and pieces of barley kernels that
have undergone the malting process and show any degree of sprout.
Frost-damaged kernels are kernels and pieces of barley kernels that
are badly shrunken and/or distinctly discolored black, brown or
green by frost.
Germ-damaged kernels (sick and/or mold) are kernels and pieces of
barley kernels that have discolored germ due to heat or mold from
respiration. This includes barley injured by heat.
Heat-damaged kernels are kernels and pieces of barley kernels that
are damaged by heat. The determination for heat-damaged kernels is
made on a pearled portion.
Weevil or insect-bored kernels are kernels and pieces of barley
kernels that have been bored or tunneled by insects.
Mold-infected kernels are whole kernels of barley that are covered
50 percent or more with a mold-like substance.
U.S. Grains Council – Importer Manual, Chapter 4 53
Sprout-damaged kernels are kernels and pieces of barley kernels that
have sprouted, that have swelling over the germ and that show
sprout after examination.
Dockage (DKG) in barley is non-barley matter removed from the
sample by the Carter Dockage Tester. Dockage is recorded to the
nearest hundredth percent, unless it is 1 percent or more.
Foreign material (FM) in barley is all matter that remains in the
sample after the removal of dockage. FM is determined on 25
grams of dockage-free barley and is recorded on the official
certificate to the nearest tenth.
To read the U. S. standards for barley issued by the Grain
Inspection, Packers and Stockyards Administration, see Appendix
C. Or visit :
There are six grades or standards for U.S. yellow corn: Grades No. 1
through 5 and Sample grade. No. 1 is the most desirable, followed
by No. 2, down on to Sample grade. The vast majority of
commercial trade within the United States is traded as U.S. No. 2 or
No. 3. The corn milling and livestock industries use these grades as
a standard, but routinely utilize grain of lower grades at a discount
without difficulty. Along these lines, exports also are generally
traded as U.S. No. 2 and No. 3.
Buyers should remember that these are guidelines the industry uses
to facilitate trade and handling efficiency. The existence of these
standards does not preclude the buyer from specifying, by individual
factor, exactly what product the buyer wishes to buy. The U.S. grain
handling industry is capable of providing, at a cost, nearly any level
of tolerance the buyer is willing to pay for.
Corn is divided into three classes based on color: yellow corn, white
corn and mixed corn. Each class is divided into five U.S. numerical
grades and U.S. Sample grade. Special grades are provided to
emphasize special qualities or conditions affecting the value and are
added to and made a part of the grade designation. They do not
affect the numerical or sample grade designation.
Broken corn and foreign material (BCFM) are determined using the
Carter Dockage Tester machine. Broken corn (BC) is all matter that
U.S. Grains Council – Importer Manual, Chapter 4 54
passes through a 12/64-inch (4.8 mm) round-hole sieve and over a
6/64-inch (2.4 mm) round-hole sieve. Foreign material (FM) is all
matter that passes through a 6/64-inch round-hole sieve and all that
remains on top of a 12/64-inch round-hole sieve. All matter other
than corn remaining in the sample is removed by hand (sweet corn
and popcorn are considered FM.)
BCFM are recorded to the nearest tenth on the shipping log and the
total of the two, BCFM, is recorded to the nearest tenth on the
official inspection certificate. This information will provide the
miller with the exact amount of millable and non-millable material.
In general, a kernel of corn is considered damaged for inspection
and grading purposes only when the damage is distinctly apparent
and can be recognized as damaged for commercial purposes.
Blue-eyed mold damage occurs when a germ is infected with blue-
eye mold, regardless of the amount.
Purple plumule is a genetic or varietal characteristic which does not
constitute damage and should not be confused with blue-eye mold.
Cob rot is caused by a fungus that attacks weakened plants and
produces a distinct coloration or rotting.
Drier-damaged kernels are kernels and pieces of kernels which are
wrinkled, discolored, blistered, puffed or swollen in appearance.
They are germ-damaged, with peeled or peeling seed coats or a
fractured or checked appearance. Drier damage should not be
confused with heat damage.
Germ-damaged kernels are kernels and pieces of kernels damaged
by respiration or heat but not materially discolored.
Heat-damaged kernels are kernels and pieces of kernels that are
materially discolored by excessive respiration, with the dark
discoloration extending out of the germ through the sides and into
the back of the kernel.
Heat-damaged kernels (drier) are kernels and pieces of kernels that
are puffed or swollen and materially discolored by external heat
caused by artificial drying methods.
Insect-bored kernels are kernels and pieces of kernels with obvious
insect-bored holes, tunneling insect webbing or insect refuse.
Kernels that are partially eaten but entirely free of refuse, webbing
or other types of damage are not considered damaged.
U.S. Grains Council – Importer Manual, Chapter 4 55
Mold-damaged kernels are kernels and pieces of kernels infected
with mold on the exposed endosperm. When a kernel is cracked or
broken, the starch is exposed and it becomes susceptible to mold.
Mold is usually blue or green in color. If the surface mold penetrates
the kernel, it is considered damaged. Kernels that have dirt on them
should not be confused with kernels containing mold.
Discolored kernels that contain a mold-like substance are considered
damaged when whole kernels are 50 percent or more covered.
Surface mold (blight) - kernels and pieces of kernels that have mold
caused by corn leaf blight. While it appears to the eye only on the
surface, it actually penetrates the seed coat.
Mold (Pink Epicoccum) - kernels and pieces of kernels that have a
To read the U. S. standards for corn issued by the Grain Inspection,
Packers and Stockyards Administration, see Appendix D. Or visit :
Sorghum is divided into four classes, based on tannin content and
color: sorghum, tannin sorghum, white sorghum and mixed
sorghum. The different types are identified by color but the
characteristic which sets each apart from the other is tannin content.
1. Sorghum - Low in tannin content due to the absence of a
pigmented testa (subcoat) and contains less than 98
percent white sorghum and not more than 3 percent
tannin sorghum. The pericap color of this class may
appear white, yellow, pink, orange, red or bronze.
2. Tannin Sorghum - Sorghum that is high in tannin content
due to the presence of a pigmented testa (subcoat) and
contains not more than 10 percent non-tannin sorghum.
The pericap color of this class is usually brown but may
also be white, yellow, pink, orange, red or bronze.
3. White Sorghum - Sorghum which is low in tannin
content due to the absence of a pigmented testa (subcoat)
and contains not more than 2 percent sorghum of other
classes. The pericap color of this class is white or
U.S. Grains Council – Importer Manual, Chapter 4 56
translucent and includes sorghum containing spots that
cover 25 percent or less of the kernel.
4. Mixed Sorghum - Sorghum that does not meet the
requirements for any of the other classes.
Each class is divided into four numerical grades and U.S. Sample
grade. Special grades are provided to emphasize special qualities or
conditions affecting the value of sorghum. Special grades are added
to and made a part of the grade designations. They do not affect the
numerical or grade designation.
Nearly all sorghum that trades in export channels today is No. 2
grain sorghum. Buyers who intend to purchase sorghum for the
purpose of feeding livestock will get better results with this low-
tannin sorghum, which is now 99 percent tannin free.
Broken kernels (BN) are all matter which passes through a 5/64-inch
(2.0 mm) triangular-hole sieve and over a 2 1/2 by 64-inch (1.0 mm)
round-hole sieve. Foreign material (FM) is all matter, except
sorghum, that remains on top of the 5/64-inch triangular-hole sieve.
BN and FM are each recorded to the nearest tenth percent on the
shipping log, and the total of the two (BNFM) is recorded to the
nearest tenth percent on the official inspection certificate.
In general, a kernel of sorghum is considered damaged for
inspection and grading purposes only when the damage is distinctly
apparent and can be recognized as damaged for commercial
Germ-damaged kernels are kernels and pieces of kernels of sorghum
that contain dark colored germs after leaching.
Ground and/or weather-damaged kernels are kernels and pieces of
kernels that contain dark stains or discolorations and have a rough,
cake-like appearance. This type of damage is caused by ground
and/or weather conditions.
Heat-damaged kernels are kernels and pieces of kernels of sorghum
that are materially discolored and damaged by heat. It is usually
necessary to cross-section the kernels to determine if the color is
Mold-damaged kernels are kernels and pieces of kernels containing
surface mold and should not be confused with dark stains or
discolorations caused by ground and/or weather conditions.
Sorghum with a mold-like substance is considered damaged when
over half of the whole kernels of sorghum or pieces of kernels are
discolored and covered with a mold-like substance.
Sprout-damaged kernels are kernels and pieces of kernels where the
sprout clearly protrudes from the germ. If there is a split over the
germ area but no sprout protruding, it is not considered sprout-
Insect-bored kernels are kernels and pieces of kernels of sorghum
that have been bored or tunneled by insects.
To read the U. S. standards for sorghum issued by the Grain
Inspection, Packers and Stockyards Administration, see Appendix E.
Or visit :
INTERPRETIVE FACTORS – VISUAL GRADING AIDS
The visual grading aids system was developed by the FGIS Board of
Appeals and Review to assist inspectors in making subjective
grading decisions and to reduce intermarket differences in
inspection results. This system consists of Interpretive Line Slides
and Interpretive Line Prints. Reference is made to the visual grading
aids throughout the grain inspection manuals.
The Interpretive Line Slide System consists of a portable table-top
viewer and photographic slide transparencies. The portable viewer
uses a precisely controlled light source of desired intensity and
quality. The Interpretive Line Slides are placed on the viewer at the
inspection table to aid the inspector in making grading decisions.
The slides are designed for use with the special viewer only. If they
are used in a normal slide projector, they will become bleached by
the high intensity light, rendering them unusable for the comparative
purposes for which they were intended.
Interpretive Line Prints are photographs exhibiting a particular
attribute. These prints allow a more uniform application of the
general appearance factors. Both the Interpretive Line Slides and
Prints are available for viewing at every FGIS Field Office and are
available for purchase from the manufacturer.
Fumigation and Grain Protectants
A fumigant is a gas which penetrates the grain kernels and kills
insects at all life stages: eggs, larvae and adults. Also, gas grain
protectants are applied to the surface of grain and kill adult insects
on contact, but do not kill insect eggs.
When a portion of cargo is graded "infested," the exporter can
accept the official certificate with "infested" designation, return the
infested cargo to the elevator or continue to load the vessel and then
fumigate it in transit, following procedures specified by FGIS. If the
exporter selects the last option, the "infested" designation is not
reported on the certificate because the condition is considered
The fumigation of vessels in transit with an aluminum phosphide
fumigant formulation is a widespread, proven safe practice.
The fumigation is performed by a registered applicator. FGIS
personnel observe the fumigation to assure that it is performed
according to correct procedures. FGIS requires the applicator to sign
a statement on the applicator's company's letterhead stating that the
fumigant was applied according to U.S. government regulations and
the manufacturer's instructions.
When an importing country has phytosanitary regulations
prohibiting the entry of certain pests, the U.S. government will
examine the cargo for the presence of the prohibited pests and issue
a phytosanitary certificate. This certificate is issued by the USDA's
Animal and Plant Health Inspection Service (APHIS), not by FGIS.
UNIFORM INSPECTION PLAN/CERTIFICATE
During the loading of an export grain vessel, FGIS follows a
uniform plan for sampling and inspection. A shipment or "lot" of
grain is divided into "sublots" for the purpose of maintaining
quality. The sublot size is based on the hourly loading rate of the
elevator and the capacity of the vessel being loaded. A sublot may
represent up to approximately 3,000 metric tons. The grade and
factors determined on each sublot must meet, within specified
tolerances, the official grades and factors requested in the applicant's
load order. Sublots that do not meet specified tolerances can be
removed from the shipment or certified separately. Otherwise, FGIS
certificates represent the entire lot of grain based on the weighted
average of sublot results at the time of loading.
The uniform inspection plan for shiplots is called the Cu-Sum Plan.
It establishes statistically-based tolerances known as breakpoints for
accepting those occasional portions of a lot that, due to known
sampling and grading variations, may grade below the desired lot
quality. The Cu-Sum Plan was adopted to ensure that the entire lot is
of uniform quality.
The inspector uses an inspection log to record his findings for each
sublot. Each log contains all of the factor results for each sublot,
plus any other observations made by the sampler and inspector. It is
a complete record of all inspection information concerning the lot.
This record is retained by FGIS; however, a buyer can obtain a copy
by requesting it in the contract.
The product of all analyzing, grading and monitoring is the Official
Export Grain Inspection Certificate. There are two options under
which shiplot grain can be loaded and certified. Under Option 1, the
exact grade must be loaded; with Option 2, the exact grade or a
better grade can be loaded. Option 2 gives the shipper more
flexibility and gives the buyer a potentially better quality of grain.
While the grain standards denote a general level of quality, more
stringent criteria can be requested in a contract. For example, if a
buyer contracts for U.S. No. 2 or better yellow corn and 3 percent
BCFM is excessive for the enduse, the contract can specify "U.S.
No. 2 or better yellow corn, maximum 2.5 percent BCFM."
However, more stringent criteria may command a premium price.
It is also important to specify in the contract all of the optional
testing services FGIS is to perform, such as "aflatoxin testing to be
performed by FGIS." If FGIS is not specified to perform the test,
then it may be done by a private laboratory.
A sample of an inspection log is included at the end of the manual as
If a discrepancy between grain quality at origin and destination
occurs, an importer can register a complaint with the U.S. Embassy's
agricultural counselor, attaché or trade officer. The embassy will
then notify the USDA's Foreign Agricultural Service (FAS) in
Washington, D.C., who in turn will notify the FGIS Office of
International Affairs (OIA). The OIA will review the complaint,
gather information about the reported discrepancy and respond to
the complaint. However, FGIS does not issue a new certificate, nor
does it function as an arbitrator between buyer and seller.
U.S. Grains Council – Importer Manual, Chapter 4 60
File samples are held for 90 days after loading. If they are available
when the complaint is filed, they will be re-examined during the
investigation. If a receiver chooses to submit a sample from
destination, then it will also be examined. The FGIS findings are
sent in a report through the U.S. Embassy to the originator of the
complaint. The facts in the response are available to any person
having financial interest in the grain.
GRAIN QUALITY IMPROVEMENT ACT OF 1986
The Grain Quality Improvement Act of 1986 required FGIS to
revise certain procedures in order to enhance the quality of U.S.
grain exports. The act addressed three primary areas: grain handling
practices, insect tolerances and the usefulness of grain standards.
Before the implementation of this act, some elevator operators
removed and stored dust, dockage and foreign material during grain
handling to reduce dust levels in the elevator, then recombined it
before loading the vessel. This practice is no longer permitted.
While the act prohibits recombining dust that has been removed and
stored, it does not require dust to be removed.
More stringent insect tolerances became effective in May 1988.
Finally, FGIS is required to study the need for additional end use
value tests for grain.
For further information on U.S. grading and sampling standards,
Federal Grain Inspection Service, USDA/GIPSA
Room 1627 -- South
14th and Independence Avenue, SW
Washington, DC 20250
Phone: (202) 720-0226
FAX: (202) 720-1015