OPTIMASI LAHAN REPLANTING KELAPA SAWIT DENGAN SISTEM TUMPANGSARI JAGUNG (Zea mays L) DAN KACANG TANAH (Arachis hypogaea L)

Abstract

The oil palm should be replanted if it is 25 years old. The area of replanting of open oil palm will make the soil become dry, dense and will be easily washed so it will become less fertile. Therefore, soil conservation efforts are needed. Intercropping system pattern can be used as an alternative to land conservation in oil palm replanting area. The experiment was conducted at Cikabayan Experimental Estate, Bogor Agricultural University from February 2018 to May 2018. Research conducted using a completely randomized design environment with three replications. The treatment used in this research is corn monoculture, peanut monoculture, intercropping 1 row corn + 1 row of peanuts and intercropping 1 row of corn + 2 rows of peanuts. The results of the growth of corn showed that intercropping treatment gived higher plant growth, stem diameter and more leaf compared to corn monoculture. Similar results were also shown in peanut plants where intercropping treatment showed higher peanut growth compared to peanut monocultures. In yield per hectare variables showed that monoculture treatment yield higher than intercropping system. Treatment of corn and peanut monoculture yields per hectare greater than the intercropping treatment. However, the equilibrium ratio of the intercropping shows the result> 1. NKL ratio of intercropping treatment 1 row of corn + 1 row of peanut is 1.40 and intercropping 1 row of corn + 2 rows of peanuts 1.46.

The leaf rust disease development of hybrid corn on shaded agroecosystem

“…The expansion of the area for corn development in Indonesia is directed at suboptimal land such as dry land and land under stands. Planting corn as an intercrop among plantation crops is often done by farmers to take advantage of the available land, especially on immature staple crops [21]. The extent of forest tenure has the potential to expand the area for corn development.…”