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Prediction of nitrate leaching losses from arable land under different fertilization intensities using the SOIL‐SOILN models
Author(s) -
Bergström L.,
Jarvis N.J.
Publication year - 1991
Publication title -
soil use and management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.709
H-Index - 81
eISSN - 1475-2743
pISSN - 0266-0032
DOI - 10.1111/j.1475-2743.1991.tb00854.x
Subject(s) - leaching (pedology) , environmental science , arable land , nitrate , surface runoff , hectare , hydrology (agriculture) , nitrogen , soil science , fertilizer , leaching model , agronomy , soil water , soil fertility , chemistry , ecology , geology , geotechnical engineering , organic chemistry , biology , agriculture
. The ability of the SOIL‐SOILN models to predict nitrate leaching rates from arable land under different fertilizer inputs is tested. The SOIL model predicts water and temperature conditions in a layered soil profile and provides driving variables for the SOILN model which describes nitrogen inputs, transformations and losses. SOILN model predictions were compared with measurements of nitrate leaching at application rates of zero, 100 and 200 kg N per hectare (NO, N100 and N200) in a long‐term field experiment in south‐west Sweden. Large discrepancies between model predictions and measurements of nitrate leaching were found in some years (up to 100%) and were attributed to important soil processes which are either not included in the model (macropore How) or are difficult to model satisfactorily (partitioning between surface runoff and infiltration during snowmelt periods, crop nitrogen uptake). Nevertheless, long‐term mean yearly leaching losses at the different nitrogen application rates (3, 6 and 46 kg per hectare at NO, N100 and N200, respectively) were reasonably well estimated by the model.