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The residual effect of nitrogen fertilizing.


, : The residual effect of nitrogen fertilizing.. Landbouw-voorlichting, 20: 149-154

Over 7 years, the residual effect of N applied in the previous year averaged 5.6% of the effect of a corresponding fresh application. The residual effect of N not taken up in the crops averaged 13.5%. Results were similar with different crops & soils. Residual effect was related to rainfall the preceding winter. After the driest winter (1959-60) it was 16.8%. After the very wet winter of 1960-61 no residual effect was found.

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