Improving the Carrying Capacity of Vertisol nd Alfisol on Dryland Ecosystem by Applying Active Powder of Cassava

Abstract

Alfisol and Vertisol have low nutrients content. Improving the carrying capacity of the soils applying an organic and organic fertilizer resulted in increasing of soil compaction and increasing of soil microbiology. Research had been done to know the effect of various dosages and time applications of powder active to improve the carrying capacity of Vertisol and Alfisol at the germinating land Ecosystem in East Nusa Tenggara. Factorial research designed as Randomized Completed Block Design replicated four times. Variables of the research were a various dosage of active powder (0, 100, 200, and 300 g/ha), and various time application active powder of cassava (on planting, seven days after panting, and 15 days after planting). The result showed that the active powder applied to cassava significantly increase the colony number of soil bacteria, improving in soil porosity, soil bulk density, total N, availability of P and K, C organic, and soil pH. Application active powder of cassava by 200-300 g/ha was able to improve the physical and chemical characteristics of Vertisol and Alfisol.