Relationship of the Illinois soil nitrogen test to spring wheat yield and response to fertilizer nitrogen
作者： S J Steckler , D J Pennock , F L Walley
DOI: 10.4141/CJSS07121
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摘要: The Illinois soil N test (ISNT) has been used to distinguish between soils that are responsive and non-responsive fertilizer in Illinois. We examined the suitability of this test, together with more traditional measures fertility, including spring nitrate-N organic carbon (SOC), for predicting yield response wheat (Triticum aestivum) on hummocky landscapes Saskatchewan. relationship ISNT-N was assessed using data previously collected a variable-rate study. Soils were re-analyzed ISNT-N. Our goal determine if could be improve prediction crop yields. Although correlated both unfertilized (r = 0.467, P 0.01) -0.671, when from all study sites combined, correlations varied according landscape position site. Stronger w...
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