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Published in Scientific Papers. Series B, Horticulture, Vol. LXV, Issue 1
Written by Plamena YANKOVA, Hriska BOTEVA, Tsvetanka DINTCHEVA

The purpose of the study is to be determined the fertilization impact and the cultivation scheme on the biological manifestations and the productiveness of Bulgarian green beans varieties, which are cultivated as per the biological method in the region of the Thracian valley. The experiment is carried out during the period 2015-2017 in the test field of Institute as per vegetable crops Maritsa - Plovdiv, in strongly leached meadow-cinnamon soil after forerunner spinach (autumn planting). The spinach is cultivated in compliance with the principles of biological production. With three Bulgarian green beans varieties: Tangra, Pagane and Evros are tested two biological fertilizers: Emosan and Biosol, with two schemes of sowing (main with width of the row-crops 80 cm and additional one of 60 cm). Significant differences are determined in the productiveness of the studied green beans varieties, cultivated as per the biological method. The highest yield is obtained of variety Evros in comparison with the rest. With the main scheme of 80 cm under influence of the bioproducts brought in the yields vary from 14170.0 kg/ha (fertilized with Biosol) up to 15156.0 kg/ha (fertilization with Emosan), the increase is respectively by 17.8% and 26.0% in comparison with the control. Considerably higher yields for the three varieties are obtained with scheme of 60 cm. The effect is higher by the application of bioproducts with varieties Pagane and Evros - 23.3% and 20.3%, in comparison with the main scheme of 80 cm. The results are one-way for all the three varieties. The impact of the bioproducts brought in is expressed least with the variety Tangra - 14.6%, where the lowest yields are reported.

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