Landscape-scale variability of nitrogen fixation and N balance of lentil
Date
1995-02-23
Authors
Mooleki, S.P.
van Kessel, C.
Slinkard, A.E.
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Abstract
A study was conducted near Dinsmore, SK in the Dark Brown Soil Zone to determine the landscape-scale variability of N2-fixation and N balance of a lentil crop. Stable 15N isotope dilution method was used to determine N2-fixation. A digital elevation model was used to establish the landform element complexes available at the site. Results showed that N2-fixation varies with geomorphological variations in the landscape. Both yield and N2-fixation were highest in the footslopes and lowest on the shoulders and upper level positions. A negative N balance was observed, with the deficit being lowest on the footslopes and highest on the upper level positions.
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Soils and Crops Workshop