Australian Journal of Soil Research articles from February 2009

Australian Journal of Soil Research archives from February 2009

Preface: nutrient management by the Australian grains industry.(Report)
February 1, 2009... The contributions to this special. edition of the Australian Journal of Soil Research report recent research undertaken as part of a Nutrient Management Initiative established by the Grains Research and Development Corporation (GRDC). The...

Key crop nutrient management issues in the Western Australia grains industry: a review.(Report)
February 1, 2009... Introduction Fertiliser costs represent a significant part of the variable costs of growing grain crops in the Mediterranean-type environment of Western Australia (WA). For example, the State average expenditure on fertilisers (S/crop ha)...

The effectiveness of deep placement of fertilisers is determined by crop species and edaphic conditions in Mediterranean-type environments: a review.(Report)
February 1, 2009... Introduction In modern agriculture, vertical stratification of soil nutrients is thought to be widespread as a result of the increased adoption of minimum- or no-till farming systems, which minimise or practically eliminate soil mixing,...

Tillage system affects phosphorus form and depth distribution in three contrasting Victorian soils.(Report)
February 1, 2009... Introduction Tillage and crop rotations can significantly influence the productivity and sustainability of modern farming systems. Tillage has been shown to affect the physical and biological processes in soils such as water conservation,...

Effects of tillage practices on soil and water phosphorus and nitrogen fractions in a Chromosol at Rutherglen in Victoria, Australia.(Report)
February 1, 2009... Introduction Excessive nutrient concentrations are a major problem for many of the streams draining agricultural catchments in Australia. In the south-eastern State of Victoria, the grains industry is one of many potential contributors to...

Fate of potassium fertilisers applied to clay soils under rainfed grain cropping in south-east Queensland, Australia.(Report)
February 1, 2009... Introduction Potassium (K) is a nutrient required in large quantities by crop plants, with only nitrogen found in greater concentrations in plant biomass (Syers 1998). However, K fertiliser inputs in Australian cropping systems have...

Identifying fertiliser management strategies to maximise nitrogen and phosphorus acquisition by wheat in two contrasting soils from Victoria, Australia.(Report)
February 1, 2009... Introduction Nitrogen (N) and phosphorus (P) fertilisers are a key component of dryland grain production systems in southern Australia, where many soils are inherently low in fertility (Perry 1992). Fertiliser is the single largest...

Wheat roots proliferate in response to nitrogen and phosphorus fertilisers in Sodosol and Vertosol soils of south-eastern Australia.(Report)
February 1, 2009... Introduction Root systems are of fundamental importance to crop productivity because they acquire the water and nutrients that support shoot growth. Unfortunately, root systems and root function are difficult to study in the natural soil...

Plant availability of phosphorus from fluid fertiliser is maintained under soil moisture deficit in non-calcareous soils of south-eastern Australia.(Report)
February 1, 2009... Introduction Fluid mono-ammonium phosphate (MAP) fertiliser has gained commercial acceptance in North America and Europe and is now being considered for grain crops in south-eastern Australia. Previous research has generally shown an...

Quantifying the benefits of accounting for yield potential in spatially and seasonally responsive nutrient management in a Mediterranean climate.(Report)
February 1, 2009... Introduction With the current cost-price squeeze in the Australian grains industry there is a need for more efficient use of fertiliser inputs (Kingwell and Pannell 2005). Improved fertiliser use efficiency can come from adjustment of...

Positive charge discovered across Western Australian wheatbelt soils challenges key soil and nitrogen management assumptions.(Report)
February 1, 2009... Introduction This work examines the current assumption that nitrate leaches freely with water flow in soils of Western Australia (WA). This assumption has important soil and fertiliser management implications because it forms the basis of...