Relative Suitability of Phosphorus Extraction Procedures for F Tropical Ferralsol

Main Article Content

J. S. Tenywa
E. Odama
A. K. Amoding

Abstract

Purpose: To evaluate the predictive capacity common procedures for soil P extraction and testing in laboratories in the region.

Materials and Methods: A pot study with treatments viz. soil phosphorus extraction methods (Bray I, Bray II and Mehlich 3), and six P application rates (0, 20, 40, 60, 80 and 100 kg P ha-1). Maize (Zea mays L.) variety Longe IV was the test crop. A Ferralsol from northwestern Uganda (West Nile) was used in this study.

Results and Conclusion: Mehlich 3 correlated most with plant P uptake by presenting the highest correlation coefficient with plant P content (r = 0.254) and a number of leaves per plant (r = 0.733). A strong positive correlation existed between Bray I and Mehlich 3 extractable P values (r = 0.975), suggesting lack of a marked difference between them; implying that either of the two procedures could be applied for soil P extraction in Ferralsols. However, Mehlich 3, being a multi-nutrient extractant, was recommended as the most suitable for P extraction for the Ferralsol used in this study.

Keywords:
Bray, extractant, Mehlich 3, Uganda, Zea mays

Article Details

How to Cite
Tenywa, J. S., Odama, E., & Amoding, A. K. (2020). Relative Suitability of Phosphorus Extraction Procedures for F Tropical Ferralsol. International Journal of Plant & Soil Science, 32(8), 27-35. https://doi.org/10.9734/ijpss/2020/v32i830315
Section
Original Research Article

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