HUBUNGAN SISTEM PEMUPUKAN DENGAN BAHAN ORGANIK TANAH DAN KAPASITAS PERTUKARAN KATION PADA LAHAN SAWAH DI KECAMATAN JATISRONO KABUPATEN WONOGIRI

BASUKI RAKHMAT. NIM. H0202031. “Fertilizing, Soil Organic Matter and Cation Exchange Capacity Relationship at Paddy Soil in Jatisrono, Wonogiri”. Under the supervision of Ir. Jauhari Syamsiyah, MS. and Mujiyo, SP., MP. Agriculture Faculty of Sebelas Maret University, Surakarta. This rsearch aims at knowing the correlation between fertilizing system with soil organic matter and cation exchange capacity (CEC) at paddy soil in Jatisrono, Wonogiri. This study is explorative and correlative research whose variable approach by survey on the location and supported with laboratory analysis. The act of determining sample point is taken randomly based on variation of fertilizing (kind and dosage of fertilizer) at each Soil Map Unit. The Fertilizing data was obtained from the result of interview with the farmers. While the data of soil organic matter and CEC available was obtained from the result of laboratory analyze. The result of this research shows that the fertilizing system in Jatisrono are non correlated significantly with the soil organic matter and CEC. The soil organic matter of Jatisrono paddy soil is ranged from 0.71% (very low) up to 4.34% (middle). While the CEC value is from 22.65 me/g (middle) up to 50.31 me/100g (very high). Key words : fertilizing, soil organic matter, CEC, paddy soil