ABSTRACT
A field experiment was conducted during the 1992 rainy season in Samaru in the northern Guinea Savanna ecological zone of Nigeria to investigate the effect of different levels of two types of compound fertilizers on yield and yield components of three varieties of soyabean (Glycine max (L.) Merrill). The treatments consisted of three varieties of soyabean (Samsoy-2, TGX 1019-2E. and TGx 923) and two types of compound fertilizers (NPK: 15:15:15 and NPK 27-13-13) at four levels each (0, 100, 200 and 400 Kg/ha). The investigation revealed that application of compound fertilizers significantly enhanced growth, yield and yield components of soyabean. The highest yield ( 1935 Kg/ha) was obtained at the highest fertilizer level (400 kg/ha). Application of NPK 15:15:15 resulted in better growth, higher yield and yield components of soyabean than NPK 27:13:13. Amongst the varieties of soyabean tested, Samsoy-2 produced more pods per plant and resulted in the highest yield whereas TGX 1019-2E was the most vigorous in growth; produced highest LAI and TDM. TGX 923 on the otherhand, had most branches and the tallest plants.
