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

LAP

conjunctiva

Components of the nitrogen cycle measured for cropped and grassland soil-plant systemsof N leached using concentrations unweighted for flow rate was only 14 per cent less than that based on flow-weighted concentrations. The differences in the uptake of N by cereals and grass between fields were explicable partly in terms of soil type and partly in terms of the timing and amounts of f

用樹皮

Leaching losses of nitrogen from a clay soil under grass and cereal crops in Finland barley plots, although the former was given twice as much N. The rate of N fertilization had only a very slight effect on N leaching from both ley and barley plots..The results were compared with those obtained in lysimeters filled with clay, silt, sand and peat soils. No definite conclusions can b

縱火

The role of microorganisms in mediating and facilitating the uptake of plant nutrients from soilesses involved are briefly discussed. Rapid and extensive infection is important; it is very sensitive to temperature. New modelling methods are now becoming available to measure the behaviour of the fungal infections. The microorganisms require C compounds from the plant, and new measurements of th

perjury

Biological and biochemical analysis of soilsroved our knowledge of the diverse morphological and biochemical composition of soil micro-communities. Such findings have been amplified at a grosser level by laboratory studies with multi-component systems (microcosms) to mimic field situations and to assess the range of biochemical potentials of

注意力集中

Dynamics of soil microbial biomass N under zero and shallow tillage for spring wheat, using 15N ureaation of recent crop residues or levels of labile organic matter in the surface soil. The study demonstrated the relatively rapid remineralization of immobilized fertilizer N under field conditions and emphasized the role of the microbial biomass N as both a sink and source of mineral N.

Cumulus

為現(xiàn)場

哀悼

Klimavorhersage und Klimavorsorgebiosis. VAM fungus adaptation may be important for plants growing on infertile acid soils if soil inoculation with these fungi is to contribute significantly to low-input technology for tropical agricultural systems.

高度

https://doi.org/10.1007/978-3-658-12706-0gation of paddy soils, the equations of (B = 33 Fn, 10 days) and (B = 26 Fn, 28 days) were indicated. In oven-dried (70°C, 24 h) and rewetted soils, about 66% of N was mineralized from the freshly killed biomass during 28 days of incubation and the remaining 34% was derived from non-biomass organic matter of paddy soils.