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Fluid Journal : Fluid Journal 2002-2004
the differential efficacy of granular and fluid fertilizer in these soils. The presence and formation of poorly soluble sources of plant P (e.g., crandallite) in granular formulations applied to calcareous soils indicates that the efficiency of fluid fertilizers may be explained through the different reaction products formed in the fertilizer zone. This indicates that crop nutrition in calcareous soils may need special formulations to minimize the stabilization of fertilizer P in forms not accessible by plants. The possibility of using fluid sources of P that not only minimize fixation reactions but also may release P to available forms needs further investigation. Dr. McLaughlin is chief research scientist, CSIRO, Dr. Lombi is research scientist, CSIRO, Dr. Holloway is principal research scientist, SARDI, Dr. Armstrong is senior agronomist, VIDA, Ms. Johnston is research assistant, CSIRO, and Ms. Brace is research assistant, SARDI. Early Spring 2004 Fluid Journal 3
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