The effect of lime of dolomite and NPK fertilizers on the response of growth, yield and protein content on black soybean (Glycine soja L.Merr) in acid soils

Abstract

The development of cultivation from plant black soybeans (Glycine soja (L.) Merr.) in the acid soils can be an alternative to increase the yield of black soybean plants. However, the utilization of acid soils is plagued by soil pH value, high content of Al, Mn, and Fe as well as low availability of macro elements N (nitrogen), P (phospor), K (potassium), Ca (calcium), and Mg (magnesium). This study aims to determine the effect of dose of lime dolomite and NPK fertilizers on the response of growth, yield, and protein content of plant black soybeans on acid soils. This research used Complete Random Design (CRD) consist of 2 factors, each factor consists of 4 levels. The dose of lime dolomite 4,5 tons/ha was able to produce the highest total dissolved protein content amounted 4,30%, while giving the lime of dolomite and NPK fertilizers showed significant results in plant’s height, weight of fresh pods, weight of seeds/plant, number of seeds/plant, weight of 100 seeds, dry weight of stover, and dry weight of roots.