Soil P fractionation was used to examine changes in soil inorganic and organic P under grazed irrigated pasture in a long-term field trial at Winchmore in Mid-Canterbury. The soil P fractionation scheme used involved ...

Objective: To investigate and quantify the effects of long-term increases in pasture production caused by variable inputs of fertiliser and irrigation on soil profile carbon under permanent grazed pasture.

A poster showing significant depletion of topsoil P over 10 years following establishment of plantation forest on grassland was mainly attributed to enhanced mineralisation of readily extractable organic P due to a combination ...

Soils constitute the largest pool of terrestrial carbon, and the development and adoption of methods designed to increase storage of carbon is an effective means of reducing atmospheric carbon dioxide. The main objective ...

Large scale afforestation of grasslands has occurred in New Zealand. Detailed investigation of changes in soil properties over time following establishment of different tree species is necessary to understand the impacts ...

Soil P composition can be conveniently determined in alkaline extracts using solution ³¹P nuclear magnetic resonance (NMR) spectroscopy, but spectral assignments are based on fragmentary literature reports of model compounds ...

A field trial was established to quantify the impacts of lime (0, 2.5, 5 and 10 t/ha) and nitrogen (N) fertiliser (0, 50, 100, 200 and 400 kg N/ha/year) addition on the dry matter (DM) production of a crop sequence of ...

Changes in soil phosphorus (P) associated with the establishment and maintenance of improved ryegrass-clover pasture under different superphosphate fertiliser treatments were examined over a 20-year period (1957-77). Results ...

Phosphorus losses from agricultural soil to water bodies are mainly related to the excessive accumulation of available P in soil as a result of long-term inputs of fertilizer P. Since P is a nonrenewable resource, there ...