There is considerable concern about pollution of surface waters with P. Although most of the research has focused on inorganic P in surface runoff, it has recently become possible to easily follow the fate of soluble organic P forms in soils and waters. Two experiments were performed to compare the relative mobility and soil fixation affinity of orthophosphate monoesters, orthophosphate diester...

Although soil phosphorus is essential for vegetation growth it not always found in labile forms, hampering its absorption by plants, and limited forest ecosystems. This study explores P state availability calcareous soils, determining which processes affect different pools parameters influence productivity of a Mediterranean pine species. We used sequential fractionation method to determine fra...

Understanding how soil phosphorus (P) fractions change is critical to achieve more efficient P use in a highly P-sorbing calcareous soil. The fields were managed without or with annual fertilizer (40 kg ha? 1), continuously growing sole cropping intercropping of maize and faba bean. Soil samples (0–200 mm) collected at the start experiment eight years later, we evaluated using sequential fracti...

We document an example of a forested watershed at the Coweeta Hydrologic Laboratory with an extraordinary tendency to retain dissolved organic matter (DOM) generated in large quantities within the ecosystem. Our objectives were to determine fluxes of dissolved organic C, N, and P (DOC, DON, DOP, respectively), in water draining through each stratum of the ecosystem and synthesize information on...

A better understanding of the P dynamic resupply roles fertilization from soil solids to solution is urgently required optimize sustainable fertilizer management practices for efficient supply. five–year experiment was used investigate effects on fractions and availability, kinetic based a novel simulation technique (Diffusive gradients in thin films (DGT) DGT–induced fluxes sediments soils (DI...

Introduction To comprehend soil P transformation and crop uptake, it is necessary to understand how the long-term substitution of mineral fertilizers with stover or biochar affects properties forms. However, effects large-scale continuous application on forms fractions response uptake by corn are largely unknown. The purpose this study was investigate role its in variation Hedley-P fractions. M...

Over the past decade, scientific studies have increasingly concentrated on effects of global phosphorus (P) scarcity food security. A comprehensive strategy that considers demand reduction and recycling possibilities is needed to address P scarcity. Reduced tillage along with crop residue retention could decrease fixation in soil, improve labile content enhance organic-P (Po) buildup its minera...

Aims Land use management affects plant carbon (C) supply and soil environments and hence alters soil nitrogen (N) dynamics, with consequent feedbacks to terrestrial ecosystem productivity. The objective of this study was to better identify mechanisms by which land-use management (clipping and shading) regulates soil N in a tallgrass prairie, OK, USA. Methods We conducted 1-year clipping and sha...

A field study was initiated in 1992 to investigate the long-term impacts of beef feedlot manure application (composted and uncomposted) on nutrient accumulation and movement in soil, corn silage yield, and nutrient uptake. Two application strategies were compared: providing the annual crop nitrogen (N) requirement (N-based rate) or crop phosphorus (P) removal (P-based rate), as well as a compar...

Using a box-sampler, surface and core sediment samples were collected from the Bohai and Yellow Seas in 1998e1999. The sediments were sequentially extracted to determine six phosphorus fractions, and non-sequentially extracted for total P (TP) and inorganic P (IP), where the difference between TP and IP was assumed to be organic P (OP). It was found that more than 70% of the total P is inorgani...