IARA Vol. XXVI No. 1 Year. 2009 (pdf, 1420 kb) - Pustaka Deptan

Vol. 26, No. 1, 2009Indonesian Agricultural Research Abstractsthickness, number of cracks and its width, conductivity, salinity, organic matter contents, pH, percentageof debris cover, and vegetative cover. The tillage condition affects the soil in term of their potential toerosion, ploughing helps to reduce erosion by producing a rough surface of micro-relief, by which thefrictional resistance of the soil to run-off is increased. It also breaks up surface crusts, caused by traffic orby the impact of raindrops, and thereby increasing porosity, ultimately infiltration capacity. In this way itincreases infiltration and reduces over land-flow. However, excess tillage may cause the aggregate tobreakdown completely and the individual particle thus formed will be susceptible to erosion. Thisparticularly true in sandy or silty soils, which are the common soil types occuring in the study area.Therefore, it can be suggested that strip-cropping and terracering combined with contour ploughing are therecommended control techniques of conserving water and soils in the area investigated.032 YUNUS, Y.Changes of physical-mechanical characteristics due to traffic soil tillage with tractor on slope soiland its effect on soybean. Perubahan sifat fisika-mekanika akibat lintasan pengolahan tanah dengantraktor pada lahan miring dan efeknya terhadap kedelai/Yunus, Y. (Universitas Syiah Kuala, BandaAceh (Indonesia). Fakultas Pertanian). Jurnal Penelitian Pertanian ISSN 0152-1197 (2006) v. 25(1) p.18-28, 4 ill., 10 ref.GLYCINE MAX; TILLAGE; TRACTORS; SLOPING LAND; SOIL CHEMICOPHYSICALPROPERTIES; SOIL COMPACTION; SOIL STRUCTURAL UNITS; SOIL MECHANICS; GROWTH;YIELDS; LAND PRODUCTIVITY.The research aimed at investigating the change of physical-mechanical properties of soil due to soil tillageusing a tractor at different slopes was carried out from April to October 2004 on Fluventic Entrudepts soilin Jatinangor, Sumedang, West Java. The trial used factorial split-plot design with 3 levels of land slopesand 6 levels of traffic tillage frequency, with 2 replications. Result showed that frequency of tillage trafficand land slopes significantly afffected on some soil physical-mechanical properties, e.g. bulk density, totalporosity, stability index of soil aggregate, permeability, consistency of the soil, etc. The descent ofphysical-mechanical properties of the soil significantly affected the growth and yield of soybean.Nevertheless, the highest yield of soybean was recorded at 6-10% slope.F08 CROPPING PATTERNS AND SYSTEMS033 TIRTOSUPROBO, S.Multiple crop farming of cotton and groundnut in West Lombok Regency: case study on SlengenVillage. Usaha tani tumpang sari kapas dan kacang tanah di Kabupaten Lombok Barat: studi kasus diDesa Slengen/Tirtosuprobo, S.; Sahid, M.; Hartono, J. (Balai Penelitian Tanaman Tembakau dan Serat,Malang (Indonesia)). Agrivita ISSN 0126-0537 (2006) v. 28(2) p. 141-149, 3 ill., 2 tables; 12 ref.Appendix.GOSSYPIUM HIRSUTUM; ARACHIS HYPOGAEA; MULTIPLE CROPPING; FARMING SYSTEMS;PLANTING DATE; INTEGRATED CONTROL; FARM INPUTS; FARM INCOME; TECHNOLOGYTRANSFER; RURAL AREAS; NUSA TENGGARA.On farm research (OFR) study was conducted in the limited irrigation paddy fields in the Slengen Village,Kayangan District, Western Lombok Regency, starting from January until October 2004. This locationwas selected due to the consideration that this location is a new area where cotton would be cultivated inrelation with the Smallholder Cotton Intensification program (Intensifikasi Kapas Rakyat, IKR). Theresearch was conducted in 22.55 hectares of field which were cultivated by 44 trained farmers withgroundnut and cotton simultaneously. As comparison, a sample was taken of 35 other farmers whocultivated groundnut monoculturally in a 22.23 hectares of field. The packages of simultaneous cultivationtechnology recommended for groundnut and cotton are: (a) delinted cotton seed utilization, (b) time and16