Distribution of Phosphorus Fractions in Orchard Soils in Relation to Soil Properties and Foliar P Contents

Phosphorus (P) fractionation is the validation of nature, solubility and relative bioavailability P. A sequential P extraction was used to determine distribution plant-available fractions in soils. The relationships these soil properties foliar contents were also determined. Results this study showed substantial differences among orchards. Higher amounts organic matter (SOM), cation exchange capacity (CEC) major plant nutrients found under orchard soils when compared with control soil. Most variables varied species as loquat > citrus guava. exhibited a slightly higher pH. Overall, all types lowered Among tree species, achieved extracting agents differed for order residual HCl-P NaOH-P NaHCO3-P H2O-P. Mostly topsoil. average amount extractable significantly those fruit orchards where total actually higher. r2 values between versus SOM, clay CEC predicted strong interrelationship variables. Leaf N guava trees consistently higher, leaf Potassium Ca than other two species. Micronutrients Fe Zn Mn Cu leaves. Regression models indicated sufficient relationship Hedley This indicates that above can be ascertain fractions, influence from