Refinement of method for prediction of soil P available to sugar cane in Mauritius
| MSI99P0184 | |
| Cavalot, P. C. Deville, J. Ng Kee Kwong, K. F. | |
| Refinement of method for prediction of soil P available to sugar cane in Mauritius | |
| Periodical article | |
| 1988 | |
| Proc. Third Congr. Ass. Reunionnaise Dev. technol. agric. Sucr. | |
| 361-365 | |
| Also published in Revue agric. sucr. Ile Maurice 67:55-63 | |
| En | |
| En | |
| The presently used modified Truog method with 0.01M H2SO4 as extractant fails in numerous instances to predict the P status of soils in Mauritius. This may be explained by 0.01M H2SO4 removing mainly Ca-bound phosphate from the soils. In view of the significance of Al-P in the P supplying capacity of soils a more accurate assessment of P available to sugar cane could therefore only be obtained if both the Al-P and the Ca-P are solubilized. This may be achieved by simultaneously raising the concentration of H2SO4 to 0.1M and reducing the extractant to soil ratio from 100:1 to 50:1. The data from 2 fields trials showed that P extracted by 0.1M H2SO4 was more closely related to cane and sugar yields than when 0.01M H2SO4 was the extractant. The data moreover showed that sugar cane yield responses to P fertilization would not be obtained once the 0.1M H2SO4 extractable P in the soils of Mauritius exceeds 80 ppm P. | |
| SUGARCANE PHOSPHORUS SOILS FERTILIZERS SOIL TESTING PLANT NUTRITION | |
| MAURITIUS | |
| Sugarcane: Soils and plant nutrition | |
| Techniques: Soil testing | |
| 1992-02-13 | |
| En | |
| Mauritius Sugar Industry Research Institute | |
| LIB | |
| CAT | |
| CHEM |