Published in Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 25 ISSUE 3
Written by Boryana CHURKOVA, Katerina CHURKOVA

Weeds have a negative impact on the productive, quality and economic indicators in the production of bird's-foot-trefoil forage. The control against them is increasingly becoming a general ecological problem, which necessitates the need to look for new approaches to eliminate them. The implementation of systems and activities for sustainable agriculture is related to control over the use of plant protection preparations. This necessitates consideration of issues related to the application of appropriate agrotechnical practices to improve soil fertility and preserve useful cultivated species in grasslands from an economic point of view. Correlation dependences and derived regression equations were calculated on the sown grass from bird's-foot-trefoil treated with the herbicides Kalam in a dose of 20 and 40 g/da and Focus ultra in a dose of 100 and 200 ml/da. It was found that imported herbicides authorized for use showed a high positive correlation between yield with gross revenues (r=1.0000) and profit (r=0.9999). Graphical models have been developed to predict the main economic indicators based on the yield obtained after treating the grass with herbicides.

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