[PDF] Top 20 Directory UMM :Data Elmu:jurnal:S:Soil & Tillage Research:Vol53.Issue3-4.Feb2000:

... 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

... ability of CRACK to reproduce this behaviour is taken as excellent con®rmation of the validity of the model. Model results for an entire winter (1985±1986) are shown in Fig. 3, alongside data from Plot 7 at Brim- ... Lihat dokumen lengkap

... of soil and thus reduce soil ...as soil is not saturated and to possibly reduce it when the water content is close to saturation (Mielke et ...Increasing soil moisture by 10% of pore space ... 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

... so tillage practices must minimize phosphate losses by leaching and surface run-off from cultivated ...by soil as inorganic phosphates, and this decreases their susceptibility to ...the soil on ... Lihat dokumen lengkap

... conservation tillage on the amount of percolate available to transport solutes to groundwater appears to be small, this does not pre- clude a large effect on solute ...the soil may have a larger impact on ... 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

... of soil organic nitrogen showed that shallow- tine cultivation may have decreased mineralisation slightly compared with ploughing in the ®rst two ...the soil was then very ...zero tillage and ... Lihat dokumen lengkap

... of soil mechanical and soil physical para- meters were measured in the plot subjected to wheel traf®c and in an untraf®cked plot ...to data recorded during the ®eld ... Lihat dokumen lengkap

... the soil particles, and hence produced a relatively more homogenous soil ...all tillage treatments ...three tillage systems are given in Table ...loam soil as given by Ghauman and Lal ... Lihat dokumen lengkap

... to soil aggregation (Puget et ...mechanised tillage. The non-stable macroaggregates formed in the sandy soil after compost application in zones with low rainfall must be considered as a short- term ... Lihat dokumen lengkap

... chapter gives an overall view on the causes of soil degradation and the measures that can be adopted to sustain soil fertility or to remediate degraded soils. Topics mentioned include drought, ... Lihat dokumen lengkap

... in soil and the accompanying mineralization and immobilization of inorganic N are key processes in the soil±plant N cycle (Watkins and Barraclough, ...in soil and the nutrient supply rate ... Lihat dokumen lengkap

... in soil water content at the 40 cm depth in plots with stone lines compared with that in the control ...(Fig. 4) and the spacing of the stone lines had a signi®cant effect on water content at all measured ... Lihat dokumen lengkap

... For this experiment, we used four plots of 4 m4 m, grouped by pairs into two larger rainfall simulation plots of 5 m10 m. The rainfall simulation plots were called K and M. Two letters were used to call each ... Lihat dokumen lengkap

... GRs ln final density Ž . yln initial density Ž . rculture period in days 4 days Ž . Parametric assumptions were evaluated using Hartley’s test for homogeneity of variances, Tukey’s test for non-additivity and ... Lihat dokumen lengkap

... In all four algal species used, carbohydrate content per cell was not greatly affected by the culture conditions showing one- to twofold changes. Carbohydrate content of S. costatum was generally increased with ... Lihat dokumen lengkap

... introducing them into a water bath at 8‰ and 208C for 4 days Table 2 . If the grower’s objective is not only to destroy but also to eliminate all traces of the worms, then oysters would have to be immersed in ... Lihat dokumen lengkap

... The authors thank Dr. Chiang, Young-Meng for his kindness in supplying gameto- phytes. We also thank Yang, Ya-Hui and Hsu, Iu-Ian for their technical assistance. This work was supported by grant, 85-AST-1.13-FID-06, from ... Lihat dokumen lengkap

... using a repeated measures analysis of variance ANOVA . In order to determine the rigor changes, the mean angle of droop for each fish was calculated from the two angles measured and then the ANOVA performed. This ... Lihat dokumen lengkap