Reduction of Nitrogen Losses Under Irrigation by Coating Fertilizer Granules
1966
Heilman, M. D. | Thomas, J. R. | Namken, L. N.
Resin-coated and noncoated NH₄NO₃ fertilizers were compared on irrigated soils with free drainage. In the greenhouse studies, coated NH₄NO₃ at rates of 150, 300, 600, and 1200 mg N per pot were more efficient than noncoated NH₄NO₃ at the same rates in increasing forage yield and N content of blue panicgrass. Coating the fertilizer particles did not affect cabbage yields under field conditions. However, increasing the coating thickness significantly reduced the N content of the cabbage. N uptake and cabbage yields decreased significantly as soil moisture availability decreased. NO₃ and mineralizable N levels in the soil indicated that the resinous membrane, by controlling fertilizer dissolution, reduced N leaching losses.
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