The nitrogen status of Saskatchewan soils – a long-time summary
Peer Reviewed StatusNon-Peer Reviewed
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The NO3-N data collected in the Saskatchewan Soil Testing Laboratory provides an excellent basis for assessing the nitrogen status and supplying power of Saskatchewan soils in relation to crop production. A variety of interim summaries and reports on this subject have been made available during the nine-year history of the laboratory. However, a comprehensive review of the nitrogen data with a view to providing background material for extension on the subject has not been undertaken. This paper includes the highlights of such a review as well as the tabulated data for future reference. The basic objective of the study was to document the NO3-N levels in Saskatchewan summerfallow and stubble fields as they relate to supplemental fertilizer nitrogen requirements. Annual variation in these requirements and the effect of soil zone and surface texture were also considered. The nitrogen-supplying power of Saskatchewan soils as estimated by the apparent difference between fallow and stubble NO3-N levels, was also examined.
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