Entries by Kylie Dyer

Use of Gypsum to reduce effluent and fertiliser nutrient losses to waterways

Tim A. Jenkins, Vesna Jenkins Centre for Sustainable Agricultural Technologies Ltd P.O. Box 29683, Christchurch 8540, New Zealand Email: tim@csat.co.nz Abstract Agricultural systems are leaky and losses of phosphorus, nitrogen, organic matter and suspended solids can impact on water quality. While direct contamination of surface water can be prevented by avoiding livestock access and effluent […]

How Fast Does Gypsum Release Calcium and Sulphur? – Dr Tim Jenkins

  For amending soil structure and reducing soil salinity, gypsum is best considered in a long term programme. Over a period of three years of annual or twice-yearly applications, soil structure can be improved significantly. Speed of action can be hastened by cultivating the gypsum in and by adding organic matter to the soil if […]

Gypsum and Dairy Factory Wastewater Irrigation

Gypsum and Dairy Factory Wastewater Irrigation Dairy Factory wastewater (DFW) can be a useful resource for pasture and crops but high sodium levels in the wastewater may accumulate in soil. Excess sodium can be detrimental to pasture and crop growth since it causes low soil water availability and poor soil structure. Soil structure effects may […]