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The economic benefits of using controlled-release urea (CRU) on wheat and maize depend on costs and grain yields. Delays in the release of nitrogen (N) from CRUs can limit the availability of early season N and crop growth. Because of its high cost, the use of CRUs for wheat and maize production by commercial growers is very limited. We investigated the effects of a mixture of CRU and uncoated urea...
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