Abstract

Southeast Sulawesi has a coastline length of 1,740 km, but the community has not made optimal use of the coastal land, especially for agricultural activities. The purpose of this study is to determine the effect of applying biochar and chicken manure on water content and some chemical properties of coastal soils, to determine the effect of biochar and chicken manure interaction on the growth of mustard plants on coastal soils and find out better doses of biochar and chicken manure on the growth of mustard plants. This study used a Randomized Block Design (RBD) with a factorial pattern consists of two factors, namely biochar B0 = 0 g polybag-1, B1 = 75 g polybag-1 equivalent to 30 t ha-1, B2 = 150 g polybag-1 equivalent to 60 t ha-1 and chicken manure which is P0 = 0 g polybag-1, P1 = 75 g polybag-1 equivalent to 30 t ha-1, P2 = 150 g of polybag-1 is equivalent to 60 t ha-1. Observed variables of moisture content, some chemical properties of the soil as well as plant height and number of leaves. The results showed that the application of biochar and chicken manure was able to increase the air content, pH, Organic-C and total-N. In the B1P1 treatment, the interaction effect on the height and number of mustard leaves and the dose of fertilizer that gave a better effect than other treatments, namely biochar 75 g polybag-1 or equivalent to 30 t ha-1 + chicken manure 75 g polybag-1 or equivalent to 30 t ha-1

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