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All Journal Journal of Agroecology Agroland : Jurnal Ilmu-Ilmu Pertanian AGROLAND: The Agricultural Sciences Journal
Danang Widjajanto
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Agriculture, Biological Sciences & Forestry

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LAND SUITABILITY EVALUATION FOR DEVELOPING LEMBAH PALU SHALLOT VARIETY CULTIVATION IN THE UPPER PART OF BULUBASEH WATERSHED DONGGALA DISTRICT Danang Widjajanto; Uswah Hasanah; Imam Wahyudi
Journal of Agroecology Vol 1, No 1 (2015)
Publisher : Journal of Agroecology

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Abstract

Lembah Palu shallot variety is a high priority commodity in Palu Valley. However, developing this commodity has faced constraints in its management. Therefore, it is important to conduct study on land suitability evaluation for Lembah Palu shallot variety cultivation based on characteristics which are environmentally specific for growing the Lembah Palu shallot variety. The aim of the research was to evaluate quantitatively and qualitatively the land suitability of Bulubaseh watershed for developing Lembah Palu shallot variety cultivation in Donggala district. Soil survey conducted in the watershed was using stratified random method approach. The stratification was determined based on the research land units obtained by overlaying different types of maps including land use, topography and soil type maps resulting in nine land units. Soil samples from each land unit were randomly taken. The quantitative land suitability evaluation was done through analysis of farming financial suitability, while the qualitative land suitability was approached parametrically. The research results showed that generally the climate of the watershed was moderately suitable (S2) and about 884.86 ha or 57.3% of the total land area of Bulubaseh watershed was classified as marginally suitable (S3) with climate, land slope, solum depth and base saturation were the main constraints. The result of the quantitative land suitability indicated that financially Lembah Palu shallot variety is suitable to be developed as a farming system for the farmers in Bulubaseh watershed, Donggala district.
LAND RESOURCE MANAGEMENT STRATEGY FOR THE SUSTAINABILITY OF THE UPPER WATERSHED OF PALU (Case Study of Miu Sub Watershed in Sigi Regency) Danang Widjajanto; Uswah Hasanah
AGROLAND: The Agricultural Sciences Journal Vol 6, No 1 (2019)
Publisher : Tadulako University

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Abstract

Population growth and regional expansion has increased land needs for settlement, agriculture, and trade in the Palu watershed causing much pressure on the upper part of the watershed where Miu watershed is situated  The general aim of the research was to generate strategy for sustainable land resources management in the Miu watershed as a buffer zone of the Lore-Lindu National Park.  The objective of the research were 1) to predict soil erosion and sedimentation, 2) to analyze the feasibility of dominant farming systems, 3) to analyze rural development, and 4) to analyze community preference on land use priority. The erosion and sedimentation, and feasibility research was conducted through soil survey and socio-economic approach.  The rural development index was determined using secondary data taken from related institution such as demography, regional structure and infra structure, and industrial-trade condition. The preferential analysis of land use priority for 10 years ahead was done using focus group discussion with farmer community leaders.  The soil erosion rate was light - heavy whilst the soil erosion index was low - very high estimated by the USLE.  The relationship between the river debit and suspended load at the upper and lower part of the watershed was found to follow the equation of Y= 0.001X1.366 (R2= 0.65), and Y = 0.001 X1.409 (R2 = 0.66), respectively. Three villages included Pakuli, Pandere, and Bolapapu had high index of rural development whereas low index was found in Lonca, Bangga and Tangkulowi.  The high-low order of land use priority was agro forestry, cacao monoculture, fresh water fishery, wetland rice, ruminant grazing, mixed culture of rice, soy bean, cassava and maize, and poultry farming.
KAJIAN PENGEMBANGAN AGROFORESTRI UNTUK PENGELOLAAN DAERAH ALIRAN SUNGAI TORANDA, KECAMATAN PALOLO, KABUPATEN SIGI, PROPINSI SULAWESI TENGAH Danang Widjajanto; Rosmaniar Gailea
Agroland: Jurnal Ilmu-ilmu Pertanian Vol 15, No 4 (2008)
Publisher : Universitas Tadulako

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Abstract

The objectives of the research were to analyze dominant factors affecting community preference on agroforestry development; to determine the commodity priority on agroforestry development; to analyze the financial feasibility of cocoa monoculture and agroforestry farming system; to estimate soil erosion rate on different land use. The research was conducted at the Micro Watershed Model of Toranda, Palolo District, Sigi Regency, Central Sulawesi Province. Social-economic survey of the local community and soil erosion aimed to analyze community perception, financial feasibility of farming systems, and land conversion impact on land degradation caused by erosion. The results of the research showed that the dominant factors affected the community preference on agroforestry development were farming system capitals, financial profit, land suitability, erosion control and land rehabilitation, agribusiness partnership, and farmer institution role. The community preference on prioritiy commodity development was in order of (Tectona grandis), mahoni (Switenia macrophylla), nyatoh (Palaquium sp.), cempaka (Michelia campaka), Ebony (Diospyros celebica), candle nut (Aleurites mollucana), and avocado (Persea americana), respectively.  The cocoa monoculture and agroforestry farming systems are feasible to be developed. The benefit-cost ratio (BCR) and Internal Rate of Return (IRR) of cocoa monoculture farming systems are 3.01 and 0.35, respectively, and agroforestry farming systems of cocoa are 4.59 and 0.40, respectively. Finally, the soil erosion rate of cocoa monoculture farming systems at 9 % slope and cocoa agroforestry farming systems at 9 % and 38 % slopes are lower than the tolerable soil loss (TSL), whiles the soil erosion of cocoa monoculture farming systems at 38 % slope and bare soil at 5 % slope are higher than the tolerable soil loss (TSL)
Co-Authors Rosmaniar Gailea SATRIYAS ILYAS Uswah Hasanah