Open AccessRelative Suitability of Phosphorus Extraction Procedures for F Tropical Ferralsol
Author(s) -
J. S. Tenywa,
Emmanuel Odama,
Alice Amoding
Publication year - 2020
Publication title -
international journal of plant and soil science
Language(s) - English
Resource type - Journals
ISSN - 2320-7035
DOI - 10.9734/ijpss/2020/v32i830315
Subject(s) - extraction (chemistry) , phosphorus , nutrient , soil test , agronomy , chemistry , soil water , zea mays , crop , zoology , mathematics , environmental science , soil science , chromatography , biology , organic chemistry
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.