Oil palm empty fruit bunch biochar fertilizer as a solution to increasing the fertility of peat soil for sustainable agriculture by Sri Nuryani Hidayah Utami, Uray Suci Yulies Vitri Indrawati

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Biochar-compost mixture as amendment for improvement of polybag-growing media and oil palm seedlings at main nursery stage by Rovica Radin, Rosenani Abu Bakar, Che Fauziah Ishak, Siti Hajar Ahmad, Lim Chin Tsong

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Prototype of the chopping machine for the fronds and leaves of oil palms by Bayu Susilo, Anis Siti Nurrohkayati, Sigiet Haryo Pranoto, Andi Nugroho

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