Clay Soil. Over a period of three years of annual or twice-yearly applications, soil structure can be improved significantly.
Add powdered gypsum at the rate of two to three handfuls per square metre, then dig the soil over and water it in. (It will take several months to get the full effect.
A. LG works much faster (days compared to months or years), takes less labor and time to apply, is lighter-weight to ship and use, will not blow away because it does not require tilling and does not create a build-up of white layer in the soil.
Gypsum is a form of hydrated calcium sulfate. Speed of action can be hastened by cultivating the gypsum in and by adding organic matter to the soil if that is practical. For amending soil structure and reducing soil salinity, gypsum is best considered in a long term programme. You can do this on an annual basis or more frequently if you prefer.
Gypsum is a soil conditioner and when applied to the soil it has the ability to break up heavy clay soils by chemical exchange between the clay and the gypsum.
In clay soil, gypsum helps to hold clay particles together in clumps, which improves soil structure. If you have a crack at 'gypsum' in a reference work such as wikipedia, you'll find reference to the caves of giant gypsum crystals in the Naica mine in Mexico. How does LG compare to traditional dry gypsum?
(It will take several months to get the full effect. Gypsum is a powdered soil amendment that landscaping experts frequently recommend for loosening hardpan clay soils. When using the product, break up the surface of the soil and apply the gypsum at the rate of 1-2Kg per square metre.
Add powdered gypsum at the rate of two to three handfuls per square metre, then dig the soil over and water it in.