PENGARUH PENGOLAHAN TANAH DAN PUPUK N SERTA PUPUK KANDANG TERHADAP SERAPAN Ca, S DAN KUALITAS HASIL KACANG TANAH (Arachis hypogaea L.) PADA ALFISOLS

The purpose of this research is to know influence of tillage,N and organic fertilizer application to Ca, S absorption and groundnut (Arachis hypogaea L.) quality on Alfisols. The research was done in field laboratory of Agriculture Faculty of Sebelas Maret University, Sukosari, Jumantono, Karanganyar and soil laboratory from December 2006 until June 2007. This research is the factorial experiment with Completely Randomized Design (CRD) as environmental design. First factor was tillage, i.e. no tillage (T0) and tillage (T1). Second factor was goat organic fertilizer , i.e 10 ton/ha (D1) and 20 ton/ha (D2). Third factor was two levels of N fertilizer,i.e urea 25 kg/ha + ZA 54,76 kg/ha (N1) and urea 50 kg/ha (N2). F-test, Kruskal Wallis test, DMRT 5 %, and Stepwisse Regression test was used in the experiment this research. The result of this research indicate that no interaction tillage, the goat organic and N fertilizer to Ca, S absorption between yield of groundnut and it’s effect of protein grade is significant. Tillage, goat organic fertilizer 20 ton/ha and urea fertilizer 25 kg/ha + ZA 54,76 kg/ha give the highest of Ca and S absorption, they were 0,032 % and 0,0047 % respectively. Tillage, goat organic fertilizer 20 ton/ha and urea fertilizer 50 kg/ha give the highest of protein grade groundnut, it was 27,06 %. Keywords : Tillage, goat organic fertilizer, N fertilizer, Ca absorption, S absorption, Arachis hypogaea L