Pengaruh Teknik Budidaya LEISA Terhadap Karakteristik Fisik Tanah Pada Sistem Rotasi Tanaman Sayur.

Abstract

Fertile soil conditions is needed to support the increase in crop production. Soil fertility is determinated by physical, chemical, and biological properties of soil. Excessive use of anorganic external inputs can affect the physic properties on the ground. This condition will result in changes the level of soil fertility. In this research, the measurement of the changes in soil physic properties due to different techniques in cropping rotation, the system of cultivation techniques LEISA (Low External Input Sustainable Agriculture), HEIA (High External Input Agriculture), and forests. Parameters to be measured in this study were soil texture, organic matter content, bulk density, soil water retention, and soil penetrability. Measurement of soil physic properties was conducted on soil depth of 0-20 cm and 20-40 cm. Land on the three sample sites have the same soil type and slope are relatively the same. The data obtained showed the soil on LEISA and HEIA have percent C-organic lower than forest (3,25%), higher bulk density than forest (0,85 g/cm3), lower soil penetration than forest (1,36 kg/cm2). LEISA have higher percent organic c (0.77%) than HEIA (0.71%), lower bulk density (0.89 g / cm3) than HEIA (1.08 g / cm3), the availability of water greater than the soil on HEIA, and soil penetrability lower (0.95kg/cm2) compared with the soil on HEIA (1.23kg/cm2)