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All Journal Jurnal Ilmu Kehutanan
Handojo Hadi Nurjanto
Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry

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Agroforestri Kelapa Sawit Sekala Kecil di Jambi dan Kalimantan Tengah: Hambatan dan Faktor-faktor yang Mempengaruhi Adopsi Ari Susanti; Hero Marhaento; Dwiko Budi Permadi; Budiadi Budiadi; Muhammad Ali Imron; Hermudananto Hermudananto; Handojo Hadi Nurjanto; Denni Susanto; Heri Santoso; Irfan Bakhtiar; Siti Maimunah
Jurnal Ilmu Kehutanan Vol 15 No 1 (2021): Maret
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2014.066 KB) | DOI: 10.22146/jik.v15i1.1513

Abstract

Oil palm has become an important export commodity for Indonesia and has been cultivated by both smallholders and large scale companies mainly as monoculture plantations. Research suggests that this massive monoculture practice has led to adverse impacts on natural and social systems. Smallholders encounter difficulties to cope with extreme climate events such as long dry seasons, fluctuating commodity price and long-term tenure insecurity. We argue that oil palm agroforestry (OPAF) could become a promising and realistic alternative to deal with these problems under social forestry (SF) program. To date, OPAF has been adopted by merely small number of smallholders in Indonesia in a limited scale. This article aims at analysing the barriers and factors which influence the decision of smallholders in adopting OPAF. We employ a hybrid method which combines qualitative and quantitative analysis. Binary logistic regression models were constructed to identify factors influencing OPAF adoption. Our findings suggest that education, having side job and relative location of smallholders’ have significantly influenced smallholders’ decision in adopting OPAF. Knowledge gaps especially on the yields and management of OPAF have likely led to low OPAF adoption.
Perbaikan Sifat Fisika dan Kimia Tanah pada Lahan Muara Sungai Progo pasca Rehabilitasi melalui Penanaman Bogem (Sonneratia sp) Eny Faridah; Daryono Prehaten; Cahyono Agus Dwi Koranto; Winastuti Dwi Atmanto; Haryono Supriyo; Handojo Hadi Nurjanto
Jurnal Ilmu Kehutanan Vol 15 No 2 (2021): September
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2234.104 KB) | DOI: 10.22146/jik.v15i2.1802

Abstract

Mangrove planting in Progo River Esturaine in Kulon Progo was hindered by its marginal conditions, where the land was dominated by very dynamic sandy substrat. This condition has caused the growth of various planted mangrove seedlings by Forestry UGM team (2015-2016) was very low. Nevertheless, it was found that Sonneratia can grow well in the location. It was expected that Sonneratia can improve site condition so it became suitable for the growth of other mangrove species. This research aimed to assess soil properties of Progo River estuarine after rehabilitation using Sonneratia. Characterisation of soil physical (texture) and chemical (salinity, pH, and soil organic matter) properties were conducted in the Laboratory of Tree Physiology and Forest Soil, Faculty of Forestry UGM. Soil samples were collected from Sonneratia plant area in various growing conditions. The results showed that growth of Sonneratia affected soil physical properties particularly increasing the proportion of clay and silt, but not soil texture class. In general, more proportion of clay and sand were detected in the bigger Sonneratia plants and in the outer section of root system. The growth of Sonneratia also affected soil chemical properties particularly soil organic matter but not soil pH and salinity.
Co-Authors Ari Susanti Budiadi Budiadi Cahyono Agus Dwi Koranto Daryono Prehaten Denni Susanto Dwiko Budi Permadi Eny Faridah Haryono Supriyo Heri Santoso Hermudananto Hermudananto Hero Marhaento, Hero Irfan Bakhtiar Muhammad Ali Imron Siti Maimunah Winastuti Dwi Atmanto