Phosphorus Fractions- Keys to Soil based P Management

Does Soil Disturbance Affect Soil Phosphorus Fractions?

Increased turnover of organic matter as a result of soil disturbance (e.g. by soil tillage) is described in principle, but the direct influence of soil disturbance on soil P turnover especially for organic farming systems has not been sufficiently proven. The objective of the study was to evaluate the short term effect of soil disturbance on different soil P fractions in a soil shaking experime...

Identifying soil organic carbon fractions sensitive to agricultural management practices

Fast Detection of Inorganic Phosphorus Fractions and their Phosphorus Contents in Soil Based on Near-Infrared Spectroscopy

For fast detection of inorganic phosphorus fractions and their phosphorus contents in soil, a method employing near-infrared spectroscopy (NIRS) combined with partial least squares (PLS) and least squares support vector machine (LS-SVM) was proposed. Fifty soil samples for each of iron phosphate, magnesium phosphate, calcium phosphate and aluminum phosphate, with application rates of phosphate ...

Surface runoff phosphorus (P) loss in relation to phosphatase activity and soil P fractions in Florida sandy soils under citrus production

Phosphorus losses by surface runoff from agricultural lands have been of public concern due to increasing P contamination to surface waters. Five representative commercial citrus groves (C1–C5) located in South Florida were studied to evaluate the relationships between P fractions in soils, surface runoff P, and soil phosphatase activity. A modified Hedley P sequential fractionation procedure w...

Bermudagrass Management in the Southern Piedmont USA. II. Soil Phosphorus

which can become exposed at the soil surface from a long history of erosion (Bruce et al., 1990). Plant production can be limited by low levels of available P due Poultry production in the Appalachian Piedmont is exto high P-fixation capacity in soils of the southeastern USA. On the tensive (U.S. Dep. of Commerce, 1992). Manure mixed other hand, there is increasing concern about excessive appli...