Investigation of Weed Infestation of Crop of Winter Wheat Grown in Conditions of Organic Production

Abstract

In the present investigation traced the dynamics of weed infestation of crop of wheat grown after two predecessors and two ways of using post-harvest crop residues (PHCR) of them in terms of organic production. The field experience carried out during 2007 – 2009 in Agricultural Experimental Station – Targovishte. The results showed that the organic production of wheat the way of using post harvest plant residue had a strong effect on the compactness and the mass of the weeds compared with factor precursor. The wheat grown in crop rotation with maize and removed from the field residue of the precursor of weeding infestation least for the whole vegetation period of the cereal – 112.9 g/da dry mass of weeds. The incorporation in the earth plant residue leads to a strong increase the compactness and the mass – 149.3 g/da dry mass which is one of the factors having a negative impact on grain yield.