Soil physical and chemical fertility dynamic under organic, semi organic and conventional rice farming systems on Termas Village, Sambung Macan District, Sragen Regency

Abstract

Rice productions and qualities of organic rice farming is better than conventional rice farming system, therefore, rice yields have been sold to abroad. The aims of this study was to evaluate the dynamic of soil fertility in term soil physical and chemical at organic, semi organic and conventional rice farming systems at Sambung Macan, Sragen Regency. The study was conducted at rice farming in Termas Village, Sambung Macan, from March 2017 to 2018. Soil composites were taken from ten points of organic, semi organic and conventional farming systems before ploughing. The soil samples were analysed for physical and chemical properties at LaboratoryBalai Pengkajian Teknologi Pertanian, Jogyakarta. The results indicated that chemical soil fertility at 2018 was better than 2017 including soil pH, soil organic C, N total, P and K extracted with HCl 25 %, as well as physical soil fertility, namely BD soil in semi-organic and organic is lower than conventional systems, permeability in organic cultivation is higher than in semi-organic and conventional cultivation.