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INDONESIA
Jurnal Sumberdaya Lahan
Published by Kementerian Pertanian
ISSN : 19070799     EISSN : 27227731     DOI : -
diterbitkan oleh Balai Besar Litbang Sumberdaya Lahan Pertanian, Jurnal Sumberdaya lahan terbit 2 kali setahun memuat suatu tinjauan terhadap hasil-hasil penelitian atau terhadap suatu topik yang berkaitan dengan aspek tanah, air, iklim, dan lingkungan pertanian
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Articles 185 Documents
DEVELOPMENT OF NATIONAL CLIMATE DATABASE SYSTEM FOR SUPPORTING AGRICULTURE RESEARCH RUNTUNUWU, ELEONORA
Jurnal Sumberdaya Lahan Vol 4, No 01 (2010): Juli 2010
Publisher : Indonesian Center for Agriculture Land Resource Development

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Abstract

One of the most significant challenges for improving the agroclimate research is availability of integrated climate data. This paper reviewed several climate database systems development of national and international levels; such as those produced by Indonesian Meteorological Climatological  and Geophysical Agency (BMKG), World Meteorological Organization (WMO), and New Zealand climatic database systems. Indonesian Agency for Agricultural Research and Development (IAARD) through Indonesian Agroclimate and Hydrology Research Institute (IAHRI) has  developed a national climate database system (CDS), called as IAHRI CDS, as a basic part of agroclimatic researches. The system was integrated the numeric climate data and thematic spatial maps by applying Geographic Information System (GIS) and programming technologies. The data mainly comes from automated and manual climate stations of Ministry of Agriculture, BMKG and Irrigation service of each province. The development of IAHRI CDS is expected as a great resource for many potential applications on agriculture research in Indonesia. Keywords : Aagriculture, climate, database system, Indonesia
Mechanisms of Releasing Fixed Potassium as Available Nutrient for Plant Growth on Smectitic Soils NUSYAMSI, DEDI
Jurnal Sumberdaya Lahan Vol 5, No 02 (2011): Desember 2011
Publisher : Indonesian Center for Agriculture Land Resource Development

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Abstract

Smectitic soils have considerable prospects to be developed into agricultural land. The distribution of these soils is quite large, i.e. more than 2.12 million ha (approximately 2:12 million of Vertisols as well as Alfisols and Inceptisols which have vertic subgroup). Smectite mineral contributed significantly to the amount of soil negative charge and controled soil buffering capacity and soil K maximum sorption. Top soil (0-20 cm) of smectitic soils are generally clay-textured, neutral to alkaline in soil reaction, moderate to high in potential K, low to high in exchangeable K, and moderate to high in cation exchange capacity. Although soil total K was high, but most of the soil K was in an unexchangeable form so that it was not immediately available to plants. While soil buffering capacity and maximum sorption on K were high. One important aspect in the management of soil K is the use of K contained in the soil. This method is quite effective, particularly for smectitic soils. The use of contained K in soil can be through the mechanism of release from unexchangeable soil K pool to exchangeable soil K pool as well as desorption from exchangeable soil K pool to soluble soil K pool. After both rection take place then, the plants will easily absorb K for their growth.
Soil Biology Contribution on Agricultural Land Suitability Evaluation of Wet Tropical Megabiodiversity Regions GITOSUWONDO, SUBOWO; SANTOSA, EDI; ANAS, ISWANDI
Jurnal Sumberdaya Lahan Vol 4, No 02 (2010): Desember 2010
Publisher : Indonesian Center for Agriculture Land Resource Development

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Abstract

Indonesia is in the region "wet tropical megabiodiversity" it would need to complete the system  for agricultural land suitability evaluation in accordance with real conditions, thus increasing the value-added resources optimally and sustainable and accountable production investment. Soil organisms as a component of production support can act as an agent of energy and nutrient cycling in the soil, improving soil physical properties, and controlling pests and disease. For that soil, biological parameters that need to be considered in evaluating the suitability of land that already exist include: N-fixing or P-solubilizing bacteria groups that live symbiosis and free-living, the fungi solubilizing P and soil organic matter decomposition groups, BGA fixing and free-living N symbiotic groups, fauna groups are able to conserve soil organic matter and improve soil physical properties. Important steps that need to be done in the evaluation of land cover inventory of soil biological populations and its role on the growth of crops, and evaluate the suitability of the soil biological parameters of the functional value of commodity options.
Contribution of Earthworms to Increase Soil Fertility and Soil Organism Activities KOSMAN, EA; GITOSUWONDO, SUBOWO
Jurnal Sumberdaya Lahan Vol 4, No 02 (2010): Desember 2010
Publisher : Indonesian Center for Agriculture Land Resource Development

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Abstract

Upland in the wet tropical region is dominated by acid soils, low organic matter content, and compacted subsoil layer (especially argillic horizone). The compacted soil inhibit penetration of plant roots and surface water infiltration and increase surface runoff and soil erosion, and low soil productivity. Soil fertility restoration through mechanical processing is difficult to be done, beside damaging the plant roots but also increasing soil erosion. Empowerment of earthworms in their life cycle can make a hole in the soil (burrower), prevent soil compaction, improve soil aeration, spreading organic matter and organic matter inhibits the rate of depreciation of land, and increase soil biological activity, and further can improve soil fertility without disrupting growth plants.
The Dissemination Of Agricultural Land Resource Maps SULAEMAN, YIYI; MINASNY, B.; H.S, MAMAT
Jurnal Sumberdaya Lahan Vol 5, No 01 (2011): Juli 2011
Publisher : Indonesian Center for Agriculture Land Resource Development

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Abstract

The Indonesian Center for Agricultural Land Resource Research and Development (ICALRD) is one of the institutes that operates under the Indonesian Agency for Agricultural Research and Development (IAARD), Indonesian Ministry of Agriculture. Its main function, among others, is to conduct agricultural land resource inventories. These activities have resulted in voluminous agricultural land resource (ALR) maps with various themes, extent and scales. A strategy is required to disseminate these data to prospective users. This paper aims to discuss the approach and method to propagate ALR maps to users. Indonesian ALR maps are composed of climatic, soil, and landform maps at various scales, themes, and extent and covering across the country. The dissemination approach includes promotion and socialization using conventional and net-based media, collaborations with national and international partners, and on-demand sale. Terms and requirements for public access to ALS maps are also presented.
The Dynamics Surface Adsorption of Fe Oxide-Humic Substance Complexes FAHMI, ARIFIN
Jurnal Sumberdaya Lahan Vol 5, No 02 (2011): Desember 2011
Publisher : Indonesian Center for Agriculture Land Resource Development

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Iron (Fe) oxide is the most abundant metallic oxides in the soils, it is highly reactive so that it has a huge influence on the dynamics of chemical balance in the soil both in terms soil fertility and environmental decontamination from toxic metal. Naturally, the surface of Fe oxide is coated with organic substances in the form of complexes compound, this condition may influence on its reactivity and retention capacity to ions in the soil solution. The presence of humic substances may increase or decrease the adsorption capacity of Fe oxide in which the complexes adsorption capacity is highly dependent on some environmental factors. Complexes formation of Fe oxide – humic substances increase cation adsorption esspecially in very acid condition. Ionic strength tends to influence on cation adsorption only at basic pH condition and the increasing of ionic strength is increased cation adsorption by complexes. Adsoption processes is also influenced by concentration, molecule weight dan type of adsorbent and adsorbate material. The presence of competition between ions and blocking process on adsorption process decreases a number of sorbed ion.
Silvopasture and its Impacts to Microclimates, Soil Properties, and Carying Capacity on Semi Arid Grass Land of West Nusa Tenggara Province, Indonesia WIGENA, I GEDE PUTU
Jurnal Sumberdaya Lahan Vol 5, No 01 (2011): Juli 2011
Publisher : Indonesian Center for Agriculture Land Resource Development

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In West Nusa Tenggara Province, natural pasture is one of important forage sources for cattle feed. Due to its agroclimate condition, carrying capacity of the native pasture is usually low. Wider variation has been observed between wet and dry seasons, and it has significant effects to cattle population. Based on the issue, a medium term of land management by introducing of silvopasture combined with legume trees, high yielding varieties of grasses, and fast growing leguminous shrubs, has been done during 1995/96-1998/99 period. The aim of the research was to increase carrying capacity of the natural pasture based on the improvement of microclimate condition, soil properties, and carrying capacity. The experiment used split-plot design with three replications. Implementation of silvopasture in the form of wind breaker (WB) and non wind breaker (NWB) are as main plot, carrying capacity estimation (grazing and cut systems) as sub plot, while introducing high yielding varieties of grasses and fast growing legume as sub-sub plot. Observation during four years showed that silvopasture could improve microclimate conditions indicated by decreasing of air temperature from 27.9-40.0oC into 22.0-38.9oC, increasing of air humidity from 62.6-93.6% into 77.1-89.1% and decreasing of saturation steam pressure deficit from 3.4-26.3 into 0.5-14.8. Soil organic matter increased almost 200% on the 3rd year and soil nitrogen increased almost 300% on the 4th year of experiment. Silvopasture system (wind breaker treatment) could increase carrying capacity grass land that varied from 1.16 to 1.75 animal unit (AU) of cattle/ha/year, while carrying capacity of non wind breaker varied from 1.10 to 1.37 animal unit (AU) of cattle/ha/year.
Environment Friendly Open Pit Mining Systems and Reclamation Post-Mining Efforts to Improve the Quality of Land Resources and Soil Biodiversity GITOSUWONDO, SUBOWO
Jurnal Sumberdaya Lahan Vol 5, No 02 (2011): Desember 2011
Publisher : Indonesian Center for Agriculture Land Resource Development

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Conventional open pit mining systems can changing the landscape and soil surface ecosystem balance, reducing soil productivity and environmental quality. On the other hand the good mining activities can increase national income, reduce pollution, decrease land slope, improve the thickness of topsoil, decrease soil density, increase infiltration- percolation and reduce soil erosion. Good implementation control of the open pit mining with the preservation of land resources and soil biodiversity can be achieved by: (1) mining blocks done from the bottom area, (2) reclamation carried out directly after the completion of mining, (3) formation of land surface with a wide terrace bench >5 m, vertical-interval bench terraces <2 m, the percentage of slope ± 60%, (4) removing the top layer of soil (topsoil) was placed back on the top layer with a thickness >20 cm and enriched with lime, organic matter, fertilizer or biofertilizer (5) biorehabilitation with endogeic earthworms and planting of legume cover crops as pioneer plants to accelerate the natural succession, and (6) maintenance up to a climax ecosystem as expected
The Role of Organic Matter to Improve Phosphate Fertilization Efficiency on Acid Sulphate Soil SUSILAWATI, ANI; FAHMI, ARIFIN
Jurnal Sumberdaya Lahan Vol 5, No 01 (2011): Juli 2011
Publisher : Indonesian Center for Agriculture Land Resource Development

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The large amount of acid sulphate soil area may be potential for agricultural development. Low soil pH, low to very low P availability and high Fe concentration are the dominant characteristics of acid sulphate soils. Low availability of P in acid sulphate soil may due to fixation process by iron and aluminum. Low N, low available K, and potential toxicityof Fe and Al are other characteristics of acid sulphate soil. Optimum agricultural management practices are required to leach the excess of Fe2+ and to maximize the P availability in order to obtain favourable conditions for rice growth. Rice straw application is part of technology for acid sulphate soil productivity improvement, a simple tecnology that sustainable and environmental friendly. Organic matter being a source of nutrients has also an important role in relation to P sorption capacity of soils through Fe chelation processes.
Opportunity for the Implementation of Conservation Farming for Cropping Gambier in West Sumatra WINARDI, .
Jurnal Sumberdaya Lahan Vol 5, No 02 (2011): Desember 2011
Publisher : Indonesian Center for Agriculture Land Resource Development

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Gambier is one of the leading commodity from West Sumatra of plantation subsector. Total area gambier cultivation in West Sumatra, currently covers 18,204 ha with a production of 10,114 tons/year. Gambier planting areas are concentrated in two regions, namely District of Limapuluh Kota and District of Pesisir Selatan. Gambier is generally cultivated by traditional farmers in the forest, both protected forest and community forest. Areas with steep slopes are usually not intended as an area of cultivation. Classes of land capability in this area range from Class V to Class VIII. The low ability of farmers, whether in farming or the economic causing of gambier cultivation technology will be potluck. Such circumstances likely causing land degradation on gambier plantation. Conservation farming with agroforestry practices have an opportunity to be developped because of low cost potentially increase income and welfare. The conservation farming has been practiced by some gambier farmer

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