Response of Soybean (glycine Max L. ) to Cow Dung and Wood Ash Application in Tropical Acid Soils of South - Western Nigeria

The study examined the effect of cow dung (beef cattle manure) and wood ash on the growth and yield of soybean in two acid soils (Typic dystrudepts) of south-western Nigeria. The experiment was conducted under field conditions at two different locations, namely, Epe and Ibiade (Ijebu- waterside) of Lagos and Ogun States, Nigeria, respectively. It was a 3 x 3 factorial experiment arranged in a randomized complete block design (RCBD) with three replications. The treatments were three rates of cow dung (0,5 and 10 t ha-1) and three rates of wood ash (0, 2.5 and 5.0 t ha- 1). Agronomic parameters which included plant height, shoot dry matter and root yields, shoot/root ratio and the grain yield were determined per soybean plant. Cow dung applied singly at 10 t ha-1 significantly (P