Comparison of Soil Phosphorus Tests for Assessing Plant Availability of Phosphorus in an Ultisol Amended with Water-Soluble and Phosphate Rock Sources
Gikonyo, Esther Wakiuru and Abdul Rahman, Zaharah and Musa, Mohamed Hanafi and Abd Rahim, Anuar (2010) Comparison of Soil Phosphorus Tests for Assessing Plant Availability of Phosphorus in an Ultisol Amended with Water-Soluble and Phosphate Rock Sources. The Scientific World Journal, 10 . pp. 1679-1693. ISSN 1537-744X
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This work reports on soil phosphorus (P) test calibrations in triple superphosphate (TSP)– and phosphate rock (PR)–fertilized soils for cost-effective fertilizer recommendations. Results showed that separate calibrations are required for TSP and PR fertilizers for conventional soil tests. Use of critical P levels (CPLs) established for TSP in PR recommendations leads to erroneous application of PR while it incurs unnecessary application costs. The iron oxide–impregnated paper was insensitive to P sources and would be the most appropriate soil test in integrated nutrient systems
|Keyword:||phosphate rock, phosphorus bioavailability, phosphorus soil tests calibration|
|Faculty or Institute:||Faculty of Agriculture|
|Deposited By:||Norhazura Hamzah|
|Deposited On:||13 Apr 2011 01:22|
|Last Modified:||13 Apr 2011 01:24|
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