Soil Phosphorus Fractionation Studies

Abstract

Total soil phosphorus in 21 soils was fractionated into 5 components viz. (a) calcium phosphate, (b) adsorbed phosphate, (c) iron and aluminum phosphate, (d) organic phosphorus and (e) phosphorus which is insoluble in the reagents which dissolve (a) , (b), (c) and (d) fractions. It is found that none of these forms of soil phosphorus is a definite fraction of total phosphorus. The amount of adsorbed phosphate gives the highest correlation (r = -J-0.8341 significant at 1% level) with the uptake of phosphorus by sorghum plants. Also the amount of adsorbed phosphate gives a highly significant correlation (-(-0.9330 significant at 1% level) with available phosphate determined by 0.5M NaHCO 3 . There is also a correlation between the uptake of phosphate by sorghum plants and the amount of calcium phosphate, but the level of significance is much lower. There is no significant correlation between the plant uptake of phosphate and the amount of phosphorus in any one of the three remaining fractions, namely iron and aluminum phosphates, insoluble phosphate and organic phosphorus.

Evaluation of outdoor and indoor dust deposition as environmental pollution in Erbil province

“…In this respect, the phosphorus content of the fine sand and clay fraction was 0.02-0.17 % in the surface 5 cm of soil [34]. In the present study, the lowest value of 2.06 mg 0.3.l -1 was recorded at Bahirka village and the minimum value recorded may be due to a leaching factor by heavy rain fall in this area, whereas organic phosphorus tends to increase and decrease with the content of organic matter and hence is comparatively low in subsoil and high in surface soils so phosphor is leached by heavy rain [35].…”

Effect of added phosphorus on the availability and forms of phosphorus present in two soils of the Manawatu-Rangitikei sand country

“…Truog's reagent extracts predominantly "calcium phosphorus" (Chang & Iuo 1963;Srivastava & Pathak 1969) and "aluminium phosphorus" (Susuki et at. 1963;Grigg 1965;Sherrell 1970), but Olsen's reagent extracts mainly "easily-soluble" and "aluminium phosphorus" (Patel & Mehta 1961;Susuki et at. 1963;Datta & Kehra 1969), with less amounts of "iron phosphorus" (Datta & Kehra 1969).…”

Cultivating Sustainability: Organic Treatments and Soil Transformation in Udaipur District

“…The importance of sustainable agriculture and soil reclamation has gained significant attention due to environmental concerns and land degradation issues (Smith & Jones, 2023;Patel et al, 2024). Organic treatments, such as biofertilizers and compost, have been shown to improve soil fertility, structure, and water retention, thereby enhancing crop yield and sustainability (Singh & Sharma, 2023;Kumar & Gupta, 2024).…”