Titlebook: Biological Processes and Soil Fertility; J. Tinsley,J. F. Darbyshire Book 1984 Martinus Nijhoff/Dr W. Junk Publishers, The Hague 1984 soil

mediocrity

Konflikte in interkulturellen Teams,rations of N and P coincided with a 2.5-fold increase in protozoan biomass. No-till contained considerably more activity than stubble mulch plots, especially in the surface 2.5 cm and there was more water storage in no-till on all dates. Differential management of agricultural residues and the resul

刀鋒

groggy

https://doi.org/10.1007/978-3-658-12706-0ntribution of microbial biomass to the pool of mobile plant nutrients in paddy soil. The quantities of nutrients mobilized in soils which had been fumigated or dried were closely related to the quantities available in freshly killed biomass. A “K.-factor” (28 days) of 0.24 for the proportion of tota

使害怕

Klimawandel als widerspenstiges Problemed for subsequent analysis. With this method, the transfer of C from roots of .C-labelled maize plants into soil and the change in soil C and P fractions were investigated..The results show that the C released from roots to soil was 13% of the total assimilated C. The remaining root-derived C in soi

Kernel

斜坡

gusher

Components of the nitrogen cycle measured for cropped and grassland soil-plant systemsured over 2 years. Soil mineral N (NH. + NO.) was measured to 1 m depth at intervals of 2 to 8 weeks. The frequency distribution of these values was approximately log-normal and the geometric mean was used as an estimate of central tendency. Overall, soil mineral N tended to decrease during the stud

GRIPE

The uptake of soil and fertilizer-nitrogen by barley growing under Scottish climatic conditionsrfectly drained till soils uptake of soil-N increased with increasing rate of fertilizer, but remained constant on a brown sand, possibly due to more efficient root exploration in the latter soil. In four out of five seasons, late uptake of soil-derived N was a major feature, and uptake from ploughe

地名表

Leaching losses of nitrogen from a clay soil under grass and cereal crops in Finlands ammonium and nitrate N contents determined for each plot separately. The surface runoff was also measured and analysed. The annual runoff and the N leached from the surface of moderately fertilized (100kg/ha/y N) cereal plots varied during 1976–1982 from 21 to 301 mm and from 2 to 7 kg/ha, respect

雕鏤

Tillage effects on nitrogen uptake by maize from fine textured soils in the northwestern Corn Belt, imum rates of accumulation by maize. Both positive and negative effects of tillage on N accumulation rates were observed. Most of the N accumulation occurred over a 30-day period and time of N accumulation was not affected by tillage. Tilled profiles tend to contain greater NO. -N, greater aeration,