REDUCING OF SEEDS LOSS FOR WHEAT CULTIVARS RECEIVED FROM SEED PRODUCERS AT PURIFYING PLANTS

Jabur, S.H.; Abdullah, N.O.

	REDUCING OF SEEDS LOSS FOR WHEAT CULTIVARS RECEIVED FROM SEED PRODUCERS AT PURIFYING PLANTS
IRAQ JOURNAL OF AGRICULTURE
Article 1, Volume 20, Issue 1, 2015, Pages 0-0
Authors
S.H. Jabur; N.O. Abdullah
Abstract
This study prepared in Mesopotamia State Company for Seeds in seeds purifying and dusting sites in Wasit governorate (Al-azizyah and Al-ahrar sites) and Kirkuk governorate Kirkuk site. The study deals with external features for wheat cultivars that the company deals with also the processes of purifying and dusting for seeds in field and purifying plants which means remove as much as possible of bush seeds and barley seeds and inert materials , in addition to other wheat cultivars also the study allowed rates of foreseeable loss before and after purification process approved by the Office of Seeds Testing and Certification and the study found a number of recommendations which are: 1- The seeds should be homogenous in size and not be a mixture of big and small seeds because it exposes one of them to loss during passing in sieves because the holes of sieves fit with one size. 2- Work according to specific gravity measuring system for seeds which means the weight of (1000 seed) where the rate should be weighing (35-40 g) so we get rid of clean and weak seeds before the receipt process. 3-Field purity : which is cleaning field by farmer before harvesting to get rid of other crops seeds and barley and bush seeds which is known as roguing and give this subject great importance by the field inspector because the field cleanliness greatly affect on purifying process and the rate of loss. 4-Numerical examination of barley: this is similar to what happening with bush seeds, the separating process of barley grains from wheat by cylinder lead to loss much of wheat seeds until barley grains arrived to the allow limit, whenever barley seeds decrease the loss of wheat seeds decrease , so it must be emphasized on making field purifying (roguing). 5-Not neglect in receiving seeds infected with diseases, insects and nematodes because that lead to its spread and transmission from one field to another and ensure on dusting through purifying.

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