Productivity of soybean under palm oil plantation on tidal swamps due to several packages of technology

Abstract

The research was aimed to determine soybean productivity in various technological packages for soybean cultivation under palm oil plantations on tidal swamps. The research was conducted in Barito Kuala, South Kalimantan, using a randomized block design with four replications. The treatment consists of six technological packages, namely: (1) farmer's technology, (2) recommendation, (3) improvement-1, (4) improvement-2, (5) improvement-3, and (6) improvement-4. The results indicate that plantations of oil palm on type C tidal swamps is suitable for soybean development. On the tidal swamps with pH soils 4.30, low of K and Ca, recommendation technology can increase pH soils from 4.30 to 5.15; availability of P, Ca and Mg; N and K uptake; plant weight; filled pods and increase seed yields 86% from farmer's technology 1.00 to 1.86 t/ha. Improvement-1 technology increase pH soils from 4.30 to 6.05; nutrient availability (N, P, K, Ca and Mg); K uptake; plant weight; root nodules; filled pods and increase seed yields 100% from farmer's technology 1.00 to 2.00 t/ha. Increased doses of dolomite, organic, N and P fertilizers from improvement-1 technological packages did not significantly increase seeds yield. This finding suggest that for developing soybean on tidal swamps, recommendation or improvements-1 technological packages could be recommended.