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Fluid Journal : Fluid Journal 1993-1995
2 Fluid Journal Winter 1994 in the 5.5 to 7.0 pH range. This makes a sound liming program essential on very acid soils. Banding favored There is no set method of applying phosphate fertilizer. If a grower is looking for maximum return from phosphate investment, band application is the best bet. Crops usually respond more to banded than to broadcast phosphate on low fertility soils. Banding puts a readily accessible P Figure 1. Effect of N application on P uptake by corn plant. Figure 2. Effect of pH on P solubility in the soil. phosphorus source in the root zone, making it positionally more available. Fixation is greater when phosphate is broadcast. However, as fertility levels increase, the banding advantage disappears. And potential yields go up. Fluids choice In addition to precision placement, water solubility of phosphate and inclusion of primary and secondary nutrients are advantages universally recognized as inherent in fluid fertilizers. Mixes are homogeneous and fluids lend themselves to banding or subsurface injection technology. Thus, fluids can play a key role in reducing phosphate fixation via precision placement where the phosphate is positionally available to plant roots. Efficiency is maximized and profits improved. Material provided by Potash & Phosphate Institute. !
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