Abstract:
Assessment of P fertilizer, P fertilizer residues and manure on the growth of rice and soybean
yields in the province of Riau conducted in Tandun Riau Rokan Hulu, MT 2010. This Assessment
wasdesigned 2-factor randomized block design with three replications. The first factor is the
residual fertilizer P, K and manure in rice plants which include: (A) 200 kg urea / ha 100 kg SP-
36/ha 100 kg KCl / ha. (B) 200 kg urea / ha 75 kg SP-36/ha 100 kg KCl / ha and manure 2 t / ha
(C) 200 kg urea / ha 25 kg SP-36/ha 100 kg KCl / ha, and (D) 200 kg urea / ha 0 kg SP-36/ha 100
kg KCl / ha and manure 2 t / ha. Factor II is the P fertilization on soybean include (a) without P
fertilizer and (b) 75 kg SP-36 / ha. The results of the assesment showed the residual of sice
fertilizer gave a significant effect on the growth and yield of soybean. Residues of rice fertilization
treatment B gave the highest yield of soybean, while treatment D gave the lowest yield of
soybean. P fertilization significantly influenced the growth and yield of soybean. P fertilizer
application by 75 kg / ha gave better growth than without fertilizer P. So is the residual effect of
fertilizer in rice and fertilizer P on soybean significant influence on the growth and yield of
soybean. Combination treatment. B with b treatment gave the highest soybean yield.
