Influence of soil type and phosphorus fertilizer on the form of phosphorus in paddy soils. Part 2. Form and availability of phosphorus in paddy soils with ample phosphorus fertilizer Shoji, S.; Higuchi, F. Journal of the Science of Soil and Manure, Japan 41(9): 353-357 1970 https://eurekamag.com/research/000/117/000117914.php