[PDF] Top 20 Directory UMM :Data Elmu:jurnal:S:Soil & Tillage Research:Vol53.Issue1.Nov1999:

... 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

... the soil pro®le is essential for plants and other organ- isms to survive periods without ...the soil pro®le, rather than as runoff, provides important environmental bene®ts to increased groundwater ... Lihat dokumen lengkap

... progressive soil erosion increases the magnitude of soil-related con- straints to ...AWC. Soil chemical constraints and nutritional disorders related to erosion include low CEC, de®ciency of major ... 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

... to tillage and planting ...stability, soil crusting was examined for the different tillage systems after the sowing of sugar beets on the Luvic Phaeozem under natural rainfall ... Lihat dokumen lengkap

... no tillage in the 2±3 month period after ...larger soil aggregates, reducing gas dif- fusivity, and greater water conservation near the soil surface overall making the soil less aerobic than ... Lihat dokumen lengkap

... surface soil horizon do not explain the greater concentrations in surface layer ¯ow from the plots previously ploughed, because over the ®rst four years of Phase II they were slightly greater at both harvest and ... Lihat dokumen lengkap

... the soil physical properties, and the nature of microbial ...by tillage appears to affect all classes of SOM life-times, from the year, and probably less, to the ...of soil structural ...of ... Lihat dokumen lengkap

... requires data of aggregate size distribution, which in turn is dependent on tillage practices (Adem et ...in soil, which are in turn linked to denitri®cation ...of soil structural ... Lihat dokumen lengkap

... secondary tillage) the intact surface mulch protects the soil from raindrop impact, thereby redu- cing crust formation, and surface runoff from high intensity storms can be virtually eliminated ...to ... 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

... and then sieved. Aggregates which passed a 16 mm sieve but were retained on a 13 mm sieve were selected for the respiration measurements. Up to 200 aggregates of this size were collected from each plot or for each ... Lihat dokumen lengkap

... It is important to consider the yield potential and sensitivity to hydrothermal regimes of wheat cultivars recommended for different dates of sowing while studying their response to moisture conservation treat- ments. ... Lihat dokumen lengkap

... intact soil cores were taken from CT and NT ®eld plots, respectively. Each soil core from CT ®eld plot was crushed gently and visible residues were picked out by hand, and 1 gm of 14 C- labeled corn leaf ... Lihat dokumen lengkap

... the soil surface is calculated using Philip's in®ltration equation (Philip, 1957), and macro-pore ¯ow starts when the rainfall intensity exceeds the in®ltration capacity of the surface aggre- ...the soil ... Lihat dokumen lengkap

... this soil fraction and its important role in plant nutrient turnover and avail- ability to growing crops (Galantini and Rosell, ...affecting soil water distribution and biological activity (Van Veen and ... 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 was covered by a shade screen mesh), both the ®nal in®ltration rate and the total in®ltration after 100 mm of rain were signi®cantly greater in TT than ...(the soil was not covered), a strongly ... Lihat dokumen lengkap

... clay soils could not be supported by statistically signi®cant results in the experiments presented here. In four long-term experiments, there were no signi®- cant differences in soil compaction or in saturated ... Lihat dokumen lengkap