Modelling soil organic matter levels after long-term applications of crop residues, and farmyard and green manures

A computer simulation model for long-term soil organic matter dynamics was developed and evaluated with data from long-term field trials in Belgium, Germany and The Netherlands. The model distinguishes four pools of soil organic components (including a microbial biomass pool) with different chemical...

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Bibliographic Details
Published in:Plant and soil 1987-03, Vol.101 (1), p.21-28
Main Authors: VAN DER LINDEN, A.M.A., VAN VEEN, J.A., FRISSEL, M.J.
Format: Article
Language:English
Subjects:
Agricultural soils
Agrology
Agronomy. Soil science and plant productions
Biological and medical sciences
Chemical, physicochemical, biochemical and biological properties
Farmyard manure
Fundamental and applied biological sciences. Psychology
Grassland soils
Green manures
Modeling
Organic matter
Organic soils
Physics, chemistry, biochemistry and biology of agricultural and forest soils
Sand soils
Soil biochemistry
Soil organic matter
Soil science
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Summary:A computer simulation model for long-term soil organic matter dynamics was developed and evaluated with data from long-term field trials in Belgium, Germany and The Netherlands. The model distinguishes four pools of soil organic components (including a microbial biomass pool) with different chemical properties. Transformation rates are described by (pseudo) first order kinetics. Effects of temperature and soil moisture tension were included. Simulation results were in agreement with experimental data from arable farming practices where common input rates were applied. Model calculations overestimated soil organic matter levels when green manures or exceptionally high input rates were applied. Inadequate experimental estimations of organic matter input rates and insufficient modelling of the soil preservation capacity for organic matter and biomass are likely reasons. After changes in the soil organic matter-input management it may take more than a century to reach new equilibrium levels.
ISSN:0032-079X
1573-5036
DOI:10.1007/BF02371026