Environmentally friendly bioameliorant to increase soil fertility and rice (<i>Oryza sativa</i>) production

Abstract Soil nutrients can be reduced because of global climate change. This is change causes high rainfall intensity and a prolonged dry season. Efforts to overcome this are fertilized using bioameliorants so that soil remain available for plants. Observations have been made from May August 2018 at the JAMTANI Field Laboratory. The study used factorial randomized block design with three replications. first factor was bioameliorant ( P 1 = goat manure 10 tons ha −1 ; 2 + Azolla pinnata 3 Sesbania rostrata dan 4 A. 5 S. ) second rice varieties (Ciherang Mendawak). application increased C-organic by 9.04% 20.41% nitrogen 11.76% 38.24%. addition did not cause differences in weight plant between Mendawak variety (61.34 g) Ciherang (56.96 g). most efficient (goat nutrient uptake efficiency value reaching 5.77%. use expected able substitute inorganic fertilizers increase production.