Abstract
The efficiency of nitrogen (N) fertilizer products and practices currently used on rice is low, and improving this efficiency would be very beneficial to rice-growing countries. The development of new N fertilizers is best achieved by following a logical sequence of testing and evaluation procedures in a variety of settings from the laboratory to the farmer's field. Novel N fertilizers currently at various stages of testing include urea supergranules for deep placement, urea coated with various materials to control the N release rate, mixtures of a urease inhibitor with urea to reduce losses, and organic N sources other than urea.
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Youngdahl, L., Lupin, M. & Craswell, E. 8. New developments in nitrogen fertilizers for rice. Fertilizer Research 9, 149–160 (1986). https://doi.org/10.1007/BF01048700
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DOI: https://doi.org/10.1007/BF01048700