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Fluid Journal : Fluid Journal 1996-1998
2 Fluid Journal Fall 1998 unavailable. RZB can change all this. Compare the data in Table 1 with Table 2. The phosphorus level in the Warsaw corn field, which produced 377 bu/A, contained from 3 to 8 times the P level measured in a nearby fence row! Water-use efficiency critical Constant rainfall does not occur throughout the entire growing season, especially in the westem Corn Belt. Figure 1 shows the amounts of rainfall during different months of the year. A Corn Belt farmer must charge the subsoil with moisture from fall, winter, and early spring rain so the summer corn crop can draw on this reserve. For example, rainfall in July and August averages 5.8 inches, but the crop needs 12 inches of water. Water-use efficiency can be improved via deeper fertility in the subsoil (RZB), which will also provide additional root volume. More vigorous root systems can absorb more water and nutrients, speeding up attaining maximum soil productivity(MSP). The result is more bushels with less water, or a higher water-use efficiency. For high-yield reduced-till corn producers, who top 300 bu/A and practice MSP, w ater-use efficiency is as high as 11.0 bu/inch of water! This high rate of efficiency can be attributed to a deeper profile and better tilth, which improves water-holding capacity and creates a more favorable environment for growing plants. Benefits of RZB Improves soil. RZB offers a long- term program to improve soil quality, producing maximum crop productivity. It builds deep fertility with high water- holding capacity. It improves soil texture and aeration. A deep spongy soil (versus compacted) is produced that can support high plant populations, thus high yields. Water- use efficiency is increased. Dee p fertility. Notice in Table 1 how chisel plowing and disking produce the most severe nutrient stratification. Phosphorus tends to concentrate in the upper zones promoting a shallow root system. The table clearly shows that phosphorus does not move and must be incorporated mechanically (RZB) to move it into the lower profile where roots can grow and proliferate. Improves uptake. Because of the chemistry of phosphorus, there is greater uptake in the moist soil environment where the fertilizer is placed by RZB. Fixation of phosphorus compounds is also reduced. Nutrients interact. Nitrogen enhances phosphorus uptake when they are placed together through deep root banding. Generally speaking, about 1 to 3 pounds of nitrogen should be applied with every pound of P2O5. These ratios promote the greatest uptake of both N and P.
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