@thesis{thesis,
		author={Sembiring  Rio Haga Ferayo},
		title ={Peran Campuran Bahan Bahan Organik dan Pupuk SP36 dalam Meningkatkan Ketersediaan dan Serapa P  Tanaman Jagung (Zea mays L.) pada Tanah Ultisol},
		year={2018},
		url={},
		abstract={This study aims to determine the effect of organic mixture can increase P uptake and maize growth on Ultisol. The research was conducted in Aek Goti village, Silangkitan Sub-district, Labuhan Batu Selatan District, North Sumatra Province. This research was conducted from October to April 2018. The experimental method used was Factorial Randomized Block Design (RAK) with 2 factors and 3 replications. Factor I giving a mixture of oragnik materials Tithonia diversifolia compost and chicken manure. Factor II of SP36 fertilizer application. The parameters observed were Ph H2O method of Electrometry, P available (ppm) Bray II method, Al-dd (me / 100g) method of tetrimetry, root dry weight (g), crown dry weight (g), P uptake of plant (mg / plant ) can be calculated by the formula:% P plant X dry bobo plant.
The results showed that the mixing of organic matter in the form of Tithonia diversifolia compost and chicken manure significantly influenced soil pH, soil Al-dd content, available P, P uptake, dry weight of crown, and root dry weight. The interaction between the mixture of organic matter mix of Tithonia diversifolia compost, chicken manure and SP-36 fertilizer had no significant effect on all parameters.}
		}