Published in Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 22 ISSUE 2
Written by Кaterina CHURKOVA, Boryana CHURKOVA

During the period 2013-2015, a field experiment was conducted on a natural grassland of Chrysopogon gryllus L. type, fertilized with phosphorus humate, boron and molybdenum humate and their combination. On the basis of the obtained yield, on average for the study period, economic indicators were determined and correlation dependences, economic efficiency and regression equations were calculated. It was found that fertilizing with humate biofertilizers showed a high positive correlation dependence between dry matter yield and gross income (r = 1.0000); cost price and production costs (r = 0.9708); profitability with gross profit (r = 0.8241). The coefficient of determination R² = 0.9675 of the very good regression dependence between production costs and cost price is high enough to represent the regression dependence equation (y = 150.72х + 1.5118). The high coefficient of economic efficiency in fertilizing with boron humate (2.90) gives grounds for the application of fertilizer for practical purposes in mass production of fodder in a natural meadow of Chrysopogon gryllus L type.

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