TANAH VULKANIK DI LAHAN KERING BERLERENG DAN POTENSINYA UNTUK PERTANIAN DI INDONESIA / Volcanic Soils in Sloping Dry Land and Its Potential for Agriculture in Indonesia (original) (raw)

2020, Jurnal Penelitian dan Pengembangan Pertanian

Volcanic soil is soil developed from pyroclastic materials released during the volcanic eruption. Althought the soil is fertile, it is mostly occurred in steep sloping highland that is critical to landslide and volcanic eruption. This paper discussed the characteristics and distribution of volcanic soils in sloping dry land, completed with the potential and constraints of their use for agricultural development. This information supports the zonation program of agricultural commodities in Indonesia. Volcanic soils distributed on the islands of Sumatra, Java, Bali, Nusa Tenggara, North Sulawesi and North Maluku. Mostly characterized by black or brownish A horizon and yellowish B horizon, crumb soil structure, crumbly consistency, high organic matter content, and low bulk density. The primary mineral composed by hyperstein, amphibole, augite, andesine, volcanic glass, plagioclase, labradorite, olivine, sanidin, apatite and biotite. The secondary minerals are d allophane, imogolit, ferr...