Published in Scientific Papers. Series A. Agronomy, Vol. LXIII, Issue 1
Written by Boryana CHURKOVA
In the period 2016-2019, the following selection populations of birds foot trefoil were tested in the experimental field of Research Institute of Mountain Stockbreeding and Agriculture (RIMSA)-Troyan using the block method in four replications, with a size of the harvest plot of 5 m2, compared to the Bulgarian variety 'Targovishte 1': Syn1, Syn2, Syn3, Syn4, Syn5. It was found that for the specific environmental conditions of Troyan, the Syn3 population achieved the highest productivity. Birds foot trefoil retained a high presence in the grassland during the second and third years of the experimental period in all tested populations, and the amount of stems predominated the leaves. Plant height (r = 0.7185) had the greatest influence on the formation of dry mass yield. A strong correlation dependence (r = 0.7891) was found between the height of plants and the amount of stems.
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