Gypsum (calcium sulphate) is a very economical source of both calcium and sulphur. The sulphur in the form of sulphate is readily absorbed by the plant. Application rates will vary according to nutrients already present in the soil and a soil test to check for all nutrient requirements is highly recommended. However, 0.5 to 1
The three important factors in applying gypsum are method, rate and frequency of application. In considering these factors much depends on whether the agriculture is dryland or irrigated, whether the topsoil or subsoil (or both) is to be treated and the nature and extent of the problem. General Application Methods 1. Irrigation, the most immediately
To calculate the fertiliser application rate required for a particular nutrient application rate, use the formula: ReGyp screened gypsum products contain approximately 17% of sulphur (S). Application Rate x % Sulphur = Sulphur application rate (kg/ha) Sulphur Kg/ha = 1000 kg/ha x 17 = 170 kg/ha ReGyp screened gypsum products contain approximately 17% of sulphur
To obtain the total cost of supply and application of gypsum per tonne of pure CaSO4.2H2O, the following information is required: A. the landed cost at the farm gate of gypsum per tonne (gypsum + freight); B. the cost of spreading or mixing in irrigation water per tonne of gypsum; C. the purity, as percentage
In deciding which gypsum to buy, the main points to consider are: the total cost of supply and application of gypsum, expressed on the basis of pure CaSO4.2H20 (Regyp - 90%+ pure), how quickly the gypsum dissolves in water (Regyp - up to four faster), how easily and evenly it spreads (Regyp - up to 30%
There are three main ways in which soils can be tested for likely gypsum response. These are: 1. On-farm tests, these are the quickest but least reliable means of assessing likely gspsum response. The simplest test is to drop about eight small (3-5 mm diameter) air-dry aggregates of soil into a container of rainwater or
In the US and in Europe plasterboard waste disposed of in landfills have allegedly created the dangerous Hydrogen Sulfide Gas (H2S). Hydrogen sulfide is a colourless, flammable, poisonous gas that smells like rotten eggs. Hydrogen Sulfide gas is very dangerous and in high concentrations is lethal and in low concentration gives a rotten egg smell.
Boral Plasterboard products REGYP recycles: Plasterboard: Regular, echostop, enviro plasterboard, unispan, wetarea, firestop, shaftliner, wetarea firestop, soundstop, enviro soundstop, impactstop, square edge, recessed edge, RE, SE. Cornice: Classiccove sydney, classiccove new york, classiccove manly, classiccove cairo, scotiacove. CSR Gyprock products REGYP recycles: Gyprock: Gyprock EC08, superchek, plasterboard CD, CD square edge, recessed edge, RE, SE,
ReGyp conducted a trial using the Neuenhuser Screw Mill S380-EMM for processing plasterboard waste. The result produced an unsatisfactory recycled gypsum product for resale. It was also perceived that the O&M cost for the machine would be too high. We think the machine maybe better suited to its main design purpose of food waste processing.
Potentially lethal hydrogen sulfite gasses (H2S) will develop in the landfill - Consequently gypsum waste should not be landfilled in the same landfill cell as organic/biodegradable waste; mono-cells for gypsum are required for safe landfilling. In addition leachate from gypsum waste will contain sulfur that could contaminate the ground water - Consequently gypsum waste should
