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Abstract (in English)
The present study was conducted under greenhouse conditions using pot experiment to compare the effects of three different types of organic fertilizers on growth and biomass of soybean from May 4 to September 22 in the research farm of Agriculture Faculty, Kabul University. The treatments included were control, nutrient-rich organic fertilizer, processed poultry manure, and vermin-compost. The effects of these fertilizers were investigated in comparison with each other and also in comparison with control treatment. Effects of these treatments on growth parameters such as plant height, number of branches and number of leaves per plant, as well as biomass index per plant were evaluated. The results of the study showed that the use of three different organic fertilizers, such as nutrient-rich organic fertilizer (5-5-5), processed poultry manure and vermi-compost with weight ratio of 1:2:4, respectively, have equivalent effects. This ratio clearly showed the comparative advantage of using nutrient-rich organic fertilizer compared to other organic fertilizers, and qualitatively comparing it with chemical fertilizers. When the effects of these fertilizers compared to the control on the increase of biomass per plant were evaluated, the result showed a significant difference.