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Interpretive Summaries:
2001 - On-Farm Rice Research – Phosphorus Rate Studies
2000 - On-Farm Rice Research – Phosphorus Rate Studies
On-Farm Rice Research – Phosphorus Rate Studies, 2000
Arkansas, Louisiana and Mississippi have all reported possible inadequacies in soil tests for making P recommendations for rice. Each state laboratory uses a different soil test extractant. This study was initiated in 2000 on clay soils in the Mississippi River Delta of western Mississippi to determine if rice responds to P fertilization at high to very high (60 to 120 lb/A) Lancaster soil test P. Tests were established in leveled fields in both cut areas and filled areas, using a range of pre-flood P rates: 0, 20, 40, 60, and 80 lb P2O5/A. The soil pH in plot areas ranged from 5.0 to 6.2. No differences in rice yield or Y-leaf tissue P concentration were observed among the P treatments at any of the eight sites. The Y-leaf tissue P concentrations at ½-inch internode elongation were all in the sufficiency range of 0.18 to 0.29 percent P. MS-09F
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