[PDF] Top 20 Directory UMM :Data Elmu:jurnal:S:Soil & Tillage Research:Vol53.Issue2.Jan2000:

... humic substances, seems feasible. In recent years, non-destructive spectroscopic methods, e.g., nuclear magnetic resonance (NMR) and electron spin reso- nance (ESR), have shed some light on the structure and reactivity ... Lihat dokumen lengkap

... on soil physical and chemical properties are the key for a sustainable crop ...production. Soil properties for an Entic Haplustoll in the semiarid region of Argentina were evaluated, where different crop ... Lihat dokumen lengkap

... of soil water contents between ®eld capacity and wilting ...time, soil cores of 100 cm 3 were taken (six replicates per plot) close to the points of penetrometer measure- ments to determine soil ... Lihat dokumen lengkap

... important soil structure and quality attribute, and there is a need to ®nd a parameter for its characterization that gives directly comparable values for all ...a soil as a percent of a reference bulk ... Lihat dokumen lengkap

... annual tillage and a long fallow period (4±6 months) under stubble mulch, and WG involved annual alternate tillage and a short fallow (1 ...the data presented were obtained in ... Lihat dokumen lengkap

... of soil structure by tillage and ®eld traf®c is an adverse process causing a reduction in productivity of arable ...and tillage systems have been ...of soil mechanical properties induced by ... Lihat dokumen lengkap

... the soil structure of Vertisols has strong potential to attain optimal condi- tions for plant growth through activation of their in- built resiliency via shrink±swell cycles (McGarry, 1996, 1997; Pillai and ... Lihat dokumen lengkap

... this tillage. Since the soil is normally at ®eld capacity after winter, the conventional system implies a major risk of soil compaction and the farmer has to wait for the soil to dry before ... Lihat dokumen lengkap

... 1989/1990, that shallow-tine cultivation decreased nitrate losses compared with mouldboard ploughing. Shallow-tine cultivation probably decreases nitrate leaching by limiting the aeration of the soil and therefore ... Lihat dokumen lengkap

... the soil when microbes are inocu- lated into it affects the resultant distribution of ...a soil was relatively dry at the moment of introduction, the survival rate of introduced bacteria was higher than ... Lihat dokumen lengkap

... conservation tillage is probably negligible because any solute remaining in the soil at the end of the growing season will be subject to leaching during the dormant ...among tillage treatments are ... Lihat dokumen lengkap

... Calculations made by ADAS in UK showed that up to 1976 farmers applied no more nitrogen to winter wheat than was removed by the crop. From 1977 onwards, however, more nitrogen was given to the crop than it removed, and ... Lihat dokumen lengkap

... both soil and phosphate with it, but it is dif®cult to de®ne where colloidally facilitated transport ends and erosion ...original soil (Sharpley, ...of soil ranged from 5 kg ha ÿ1 to 1910 3 Mg ha ÿ1 ... Lihat dokumen lengkap

... of soil aggregates under tillage has been generally described ...and soil material displacement, may lead to dramatic structural changes (Bresson and Boif®n, ...where soil particles could have ... Lihat dokumen lengkap

... of tillage practices on the leaching of nitrate from structured clay ...of tillage effects and also to address the by-pass ¯ow in clay soils, it is important that a model has a complete, detailed and ... Lihat dokumen lengkap

... but a length of 120 mm, placed on top of the ring. Within the tube, a brass weight (the falling weight) of 16 mm diameter and 55 mm length is free to fall a maximum of 120 mm. The guide tube has long ver- tical slots to ... Lihat dokumen lengkap

... evaluate soil quality differ between farming systems, soil types and land uses (MacEwan and Carter, ...that soil tilth (described by porosity, aggregation and other structural measures) is a useful ... Lihat dokumen lengkap

... in soil quality to maintain high production and reduce negative environmental impacts is necessary for alternative crop production strategies to become socially acceptable and viable in the ...curb soil ... Lihat dokumen lengkap

... to soil which had been mouldboard ploughed the previous day, incorporating the chopped residues of the previous cereal ...the soil subsequently loosened down to 100 mm depth with a rotary ... Lihat dokumen lengkap

... silty soil in Nor- way (Riley, 1985) and on silty marsh soil in Denmark (Rasmussen, 1988), probably due to waterlogging at ...clay soil in Sweden and Finland has been one of the soil types for ... Lihat dokumen lengkap