With the climate change and deforestation, The relationship between vegetation succession and soil hydraulic properties has been concerned. The dynamic of soil hydraulic properties recovery at different time intervals is still under discussion. This study was made on several decades after deforestation, and it provides data about the deep layers (80 cm). The result indicated that improvement of soil hydraulic characteristics and mediation of overland flow related to increasing in macroporosity and root biomass as advancement of forest succession.

Gully erosion can be the dominant erosion process in some regions and can result in large volumes of sediment being delivered to streams. Here, gully density is predicted across the Murray–Darling Basin - the mean gully density was predicted to be 0.08 km km^–2 and it was estimated that gullies contribute up to 27 million tonnes of sediment to the river network each year. This is equivalent to the amount of sediment eroded from all other sources in the Murray–Darling Basin.

Information on soil quality, energy use and disease in irrigated cotton rotations under varying stubble management in sodic Vertosols is limited. In an experiment conducted in northern NSW, where the treatments were: continuous cotton (CC), cotton–vetch (CV), cotton–wheat (CW), and cotton–wheat–vetch (CWV), soil quality was best with CW and CWV but poorest with CV. Growing vetch reduced greenhouse gas emissions by substituting fixed atmospheric N for N fertiliser from fossil fuels. Black root-rot of cotton increased as the number of cotton crops sown increased.

The prediction of soil respiration was studied using classical statistical methods and state-space methods. Results showed that all used state-space models predicted soil respiration time series better than the classical statistical models, because classical methods do not consider temporal/spatial coordinates and assumed sample independence. State-space approach is an effective tool for studying the temporal relationships between soil respiration and influencing factors, and can be used to predict soil respiration time series.

Understanding the dynamics of metals in the agricultural setting is important as most are essential micronutrients but in elevated concentrations these can become toxic. Different forms of metals in the soil can be more or less biologically available to plants and this has impacts on the health of the plant as well as grazing animals. This study aimed to understand these changes using a range of metals, metal concentrations and soils.

Copper (Cu) deficiency is widespread in most of the world’s calcareous soils. To manage this issue, we need to quantify the Cu behavior in such soils. Our results confirmed that the release rate of native Cu in these calcareous soils is controlled by diffusion of Cu through a reacted soil particle or aggregate. CEC was found to be the most influential factor in controlling Cu release and 2h equilibration in DTPA soil test may be sufficient for calcareous soils of Iran.

Decreases in soil carbon have been measured in New Zealand dairy grazed soils. We investigated whether soil carbon leaching was increased by cow urine deposition; which was the case. However, losses of soil C by leaching were small and it was likely that priming of soil carbon decomposition is the dominant pathway of loss of soil carbon under urine patches.

Soil CO₂ production and efflux are the important processes of the global carbon cycle. We measured soil CO₂ efflux and soil CO₂ concentration concurrently in three subtropical forests, and found both parameters increased gradually with forest age but the incremental increase of soil CO₂ concentration was greater than that of soil surface CO₂ efflux in younger forest. Our results suggest that more carbon as CO₂ gas can be sequestered in the younger forests.

The longevity of nitrification inhibitor dicyandiamide (DCD) and the nature and of its biophysical disappearance in soil are not well understood. In field trials soil temperature was a major control factor for the variation, and the half-life was longer in lower soil temperature condition. These results suggest that different amounts and frequencies of DCD application may be required in different seasons to optimise its effectiveness by sustaining effective concentration of DCD in soil.