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All Journal Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat Jurnal Tanah dan Iklim
. Sulaeman
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Agriculture, Biological Sciences & Forestry

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Regional Partnership Program in Developing of Potential Agricultural Resource Based on Integrated Agricultural Technology in Buol Distric Nur Hayati; . Najamudin; . Sulaeman; Sri Anjar Lasmini
Agrokreatif: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 4 No. 2 (2018): Agrokreatif Jurnal Ilmiah Pengabdian Kepada Masyarakat
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agrokreatif.4.2.174-180

Abstract

Lakea Sub-district, Buol District has a wealth of natural resources (SDA) potential in the form of large and fertile plains area that can be developed into agricultural land for food crops and horticulture, areas with hilly topography can be developed various types of plantation commodities, forest resources that can be cultivated MPTS and marine potential. To optimize the potential of natural resources is needed integrated agricultural technology that can be applied by the community. Regional partnership program aims to assist the community in exploiting the potential of natural resources owned by kindly and wisely through integrated agricultural technology innovation to improve their welfare. PKW is implemented in two villages in Lakea Sub-District, Lakea I and Ngune Village. The methods used in the implementation of the program include: training, plot demonstration technology, guidance, and community assistance. The results of the program implementation showed that the adoption of technology was good enough from the target community group which is showed by the transfer of technology in the development of SRI rice cultivation with legowo row planting system, the development and entrepreneurship of local-made production facilities include bioinsecticide development Beauveria bassiana, Trichoderma sp biofungicide, liquids organic fertilizer and granules, development of PKW production facilities, and development of forage grazing garden with Panicum sarmentosum grass cultivation. The technology assembly is as the result of a suitable PKW team study to be developed in the Lakea District of Buol Regency in utilizing and developing the potential of natural resources in the program target location. Results of demonstration plot of rice cultivation of SRI with legowo 2:1 row planting system resulted in rice production of 4.7 t ha-1 higher than the conventional were 3.5 t ha-1.
Enhancing the Reactivity of Phosphate Rocks by Acidulation . SULAEMAN; . SUPARTO; . EVIATI
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 20 (2002): Desember 2002
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n20.2002.%p

Abstract

Indonesian soils requiring a considerably large amount of P fertilizer, since it comprises a large area of phosphate poor soils as Ultisols, Oxisols, and part of Inceptisols. Phosphate rock, particularly of domestic origin, is one of cheapest P sources if it can be applied directly. Acidulation is performed to obtain sufficiently reactive phosphate rocks to give dissolved P (in weak acid) required by annual crops, although not too soluble (in water) to easily leach. The objective of this study was to obtain an efficient P source fertilizer with inexpensive production cost. Eight types of phosphate rocks of domestic and overseas origins were gradually acidulated with sulphuricand phosphoric acids. P fertilizers reactivity were tested by using extracted P content in water, citric acid, and formic acid to total P content ratio. The results showed that the reactivity (in citric acid) orders of tested phosphate rocks were Ciamis > Cileungsi > Algeria > Gresik > Maroko > Sukabumi >Christmas > Senegal. Based on gained regression equation, total P content and reactivity of produced fertilizer for each degree of acidulation with H2SO4 and H3PO4 can be calculated. Water extractant gives the most sensitive indicator value of increased reactivity, followed by citric and formic acids.
Point of Zero Charge Determination and the Inluence of P, Basic Slag, Organic Matter and Lime Applications on Colloidal Charge and Quality of Oxisols MARKUS ANDA; ANTONIUS KASNO; WIWIK HARTATIK; . SULAEMAN; J. SRI ADININGSIH
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 19 (2001): Desember 2001
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n19.2001.%p

Abstract

The colloidal charge manipulation of highly weathered soils using point of zero charge (PZC or pHo) approach is important in improving soil chemical properties. The objective of this study was to determine the PZC and manipulate colloidal charge surfaces of Oxisols in order to increase their quality. PZC was determined by adjusting pH values from 3 to 7 using potentiometric titration. The change of colloidal surface charges was measured using two extractants; NH4-acetat pH 7 and NH4Cl. A glass house experiment was carried out using 4.5 kg soil/pot. Soil was taken from Sonay, South East Sulawesi and from Sitiung, West Sumatra. Soil was taken from surface layer (0-20 cm) and subsurface layer (20-40 cm) for each location. Four factors consisted of P fertilizer, basic slag, organic matter and lime were used to manipulate colloidal surface charge. The treatment rates were 100, 200 and 400 ppm P for P fertilizer; 2, 4 and 8 t/ha for basic slag; 10, 20 and 40 t/ha for organic matter; 1.5, 3 and 6 t/ha for lime, and a complete control. All 13 treatments with three replications, were arranged using a randomized complete block design in which each layer of two Oxisols is used as a block. The results showed that values of PZC for a surface layer of Sonay Oxisol (OSY) and for surface and subsurface layers of Sitiung Oxisol (OSG) are similar, i.e, pHo was 3.5. In addition, the PZC value for the subsurface layer of OSY occurs at pH 5 which is the highest pHo value compared to three other layers. The PZC value of OSY, at a surface layer is higher than its soil pH value (5.0 vs 4.4) suggesting that colloidal surfaces bear a positive charge. In contrast, the PZC values for the surface layer of OSY and surface and subsurface layers of OSG were lower than their soil pH values, indicating the colloidal surfaces bear a negative charge. Application of P, basic slag, organic matter, and lime was able to manipulate colloidal charge surfaces having positive charges become negative and that the low negative charge of colloidal surfaces become more negative as evidenced from the increase cation exchange capacity (measured in NH4Cl) compared to a control treatment. Application of P, basic slag,organic matter, and lime could increased quality of Oxisols as shown by decreasing K leaching and by increased soybean yields, which drastically increased compared to a control treatment.
Co-Authors . EVIATI . SUPARTO ANTONIUS KASNO J. SRI ADININGSIH MARKUS ANDA Najamudin Najamudin Nur Hayati Sri Anjar Lasmini Wiwik Hartatik