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The Changes of P-fractions and Solubility of Phosphate Rock in Ultisol Treated by Organic Matter and Phosphate Rock

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Table 2.  Chemical characteristics of organic matter Pj, Cm, and Ic before and afterdecomposed.
Table 3.   Effects of combination of types and rates of organic matter  and phosphate rockon soil pH.
Table  4.  Effects of kinds and rates of organic matter on phosphate rock solubility.
Table 5.  Effects of combination of kinds and rates of organic matter on soil Inorganic-PNaHCO3 (NaHCO3-Pi).
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