Seeds having discoloured cotyledons ranging in colour from orange to dark brown are counted to determine the percentage of heated seeds.The potentially heated seeds are cut or are placed on a strip of masking tape and crushed with a seed roller to expose the cotyledons.Those seeds having shiny brown to black seed coats are separated by hand as potential heated seeds.The cleaned sample is divided to a representative portion, depending on the concentration of heated in the sample.Severely heated seeds usually have a heated odour. The seed coats of heated seeds are usually shiny brown or black. Heated refers to seeds with discoloured cotyledons ranging in colour from orange to dark brown depending on the severity of heat damage.
Samples considered fireburnt are graded Flaxseed, Sample CW/CE, Account Fireburnt. Evidence includes odour, pieces of charred wood, and so on. Samples that show any evidence of being charred or scorched by fire are considered fireburnt. Samples containing fertilizer pellets in excess of 1.0% of the net sample weight are graded Flaxseed, Held IP Suspect Contaminated Grain.Fertilizer pellets are assessed as stones when the concentration does not exceed 1.0% of the net sample weight.Handpick any fertilizer pellets and determine the concentration basis the net working sample.They are typically small, round or irregular shaped and usually white, grey, brown, pink or reddish in colour. Extraneous materialĬan be defined as glass, metal, wood, plastic or any other material not already defined in the Official Grain Grading Guide.įertilizer pellets are a manufactured plant nutrient product used by producers in the production of grain.
Important : Wear gloves and a mask to handle any samples that you suspect may contain excreta. See Soft earth pellets.Įrgot is a plant disease producing elongated fungal bodies with a purplish-black exterior, a purplish-white to off-white interior, and a relatively smooth surface texture.Įxcrement from any animal including mammals, birds and insects. Soft earth pellets are pellets that crumble under light pressure.Hard earth pellets are pellets that do not crumble under light pressure.Add the two percentages of damage together to determine the total damage.If any heated seeds are detected or if the sample has a heated odour, refer to the procedure for assessment of heated. The number of damaged seeds is converted to a weight percentage by weighing an equal number of sound seeds and dividing the weight of the sound seeds by the weight of the representative portion. The suspect damaged seeds are cut or are placed on a strip of masking tape and crushed with a seed roller to expose the cotyledons.Determine the percentage concentration by weight for the visually damaged seeds.Handpick the representative portion for visually damaged seeds and suspect damaged seeds.Divide the sample to the appropriate representative portion.
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