Growth Response and Yield of Maize and Soybean in Intercropping to the Urban Waste Compost And Rock Phosphate

The research aims to study the growth response and yield of maize and soybean in intercropping to the using of urban waste compost and rock phosphate. This research was conducted at Sei Dadap Village, Asahan district, Province North Sumatera from May to September 2010. This research was compilled use Randomised Complete Design with two factors and three replications. The first factor is the using of urban waste compost with four level, i. e 0.0 ton ha-1, 10 ton ha-1, 20 ton ha-1, and 30 ton ha-1. The second factor is using of rock phosphate in three level, i. e 0.0 ppm P, 50 ppm P, and 100 ppm P. The results shown using of urban waste compost up to 30 ton ha-1 and rock phosphate up to 100 ppm P increase the height of plant, either on maize in observation 2, 4 and 6 weeks after plant or soybean in age of 10, 20, and 30 days after plant, stimulate the flowering for maize, the weight of 1, 000 dried grain and yield of dried grain per plot as well as the increasing of the number of branch per plant, weight of 100 dried grain and production of dried grain soybean per plot.