Is rich in soluble Calcium 19% and Sulphur 22%. Acid soils
are naturally low in Calcium therefore where additional
Calcium is needed; gypsum is an ideal source for these
crops. Potatoes are often grown in acidic soils to control
common scab. In these conditions gypsum will improve
1. Improves Soil Structure
Gypsum provides calcium, which is needed to flocculate
clays in soil. This allows root growth and air and water
2.Reclaims Saline Soils
Gypsum is the most economical way to reclaim saline soils.
The calcium replaces the sodium held on the clay-binding
sites. The sulphate is the residue from the gypsum.
3. Prevents Soil Crusting/Aids Seed Emergence
Gypsum can prevent crust formation on soil surfaces which
result from rain drops or sprinkler irrigation on unstable
soil. The gypsum is either surface applied or put in the
irrigation system. Prevention of crust formation means
more seed emergence.
4. Improves Low-Solute Irrigation Water
Irrigation water from rivers that no longer have sources of
leachable salts either penetrates poorly into soil or causes
soil particles to degrade, which results in low water
penetration. This can be corrected with the use of gypsum.
5. Improves Compacted Soil
Soil compaction can be prevented by not ploughing or
driving machinery on soil when it's too wet. The
compaction in many soils can be decreased with gypsum,
especially when combined with deep tillage.
6. Makes Moist Soils Easier to Cultivate
Soils that have been treated with gypsum have a wider
range of soil moisture levels where it is safe to cultivate
without danger of compaction or deflocculating.
7. Stops Water Runoff and Erosion
Gypsum improves water infiltration rates into soils and the
hydraulic conductivity of the soil. It is protection against
excess water runoff from especially large storms that
8. Prevents Water logging of Soil
Gypsum improves the ability of soil to drain and not
become waterlogged due to a combination of high sodium,
swelling clay and excess water.
9. Binds Organic Matter to Clay
Gypsum is a source of calcium which is a major mechanism
that binds organic matter to clay in soil.
10. Makes Polymer Soil Conditioners More Effective
Gypsum increases the beneficial effects of water-soluble
polymers used as amendments to improve soil structure.
11. Makes Magnesium Non-Toxic
In soils having unfavorable calcium: magnesium ratios,
such as serpentine soils, gypsum can create a more
12. Corrects Subsoil Acidity
Gypsum can improve some acid soils even more then lime.
Surface crusting can be prevented. The effects of toxic
soluble aluminum can be decreased, even in the subsoil
where lime will not penetrate.
13. Improves Water Use Efficiency
Gypsum increases water-use efficiency of crops. In times
of drought, this is extremely important. Improved water
infiltration rates, improved hydraulic conductivity of soil
and better water storage in the soil all lead to deeper
rooting and better water-use efficiency.
14. Helps Plants Absorb Nutrients
Calcium, which is supplied in gypsum, is essential to
the mechanisms by which most plant nutrients are
absorbed by roots.
15. Prevents Heavy Metal Toxicity
Calcium acts as a regulator of the balance of
particularly the micro nutrients, such as iron, zinc,
manganese and copper in plants. It also regulates
non-essential trace elements. Calcium prevents
excess uptake of many of them, and, once they are in
the plant, calcium keeps them from having adverse
effects when their levels get high.
16. Increases Value of Organics
Gypsum adds to the value of organic amendments.
Blends of gypsum and organics increase the value of
each other as a soil amendment.
17. Improves Vegetable Quality; Prevents Some
Vegetable do requires an adequate amount of calcium.
Calcium moves very slowly, if at all. Calcium must be
constantly available to the roots. This is especially
true in very high pH soils. Gypsum is preferred over
lime for potatoes grown in acid soils so that scab may
18. Provides a Source of Sulphur
Gypsum contains sulphate, a natural form of sulphur
which is readily available for soil needs and plant up-
take. This replenishes the sulphur which is no longer
being added to the soil due to the use of high-analysis
fertilizers, which contain very little, if any, sulphur.
19. Helps Prepare Soil for No-Till Management
A liberal application of gypsum is a good procedure
when starting a piece of land into no-till soil
management or into pasture crops. Improved soil
aggregation and permeability will last for years and
surface-applied fertilizers will more easily penetrate
into the soil.
20. Decreases Bulk Density of Soil
Gypsum-treated soil has a lower bulk density
compared with untreated soil. Organics can decrease
it even more when both are used. The softer soil is
easier to till and crops respond better.
21. Multiplies the Value of Other Inputs
Gypsum can improve the response to all other inputs,
including fertilizers. It more than adds to their
beneficial effects - it multiplies them.
22. Keeps Clay off Roots
Gypsum can help keep clay particles from adhering to
the roots of crops like potatoes, carrots, parsnips and
sugarbeet. This is cost-saving especially at harvest
23. Decreases Loss of Nitrogen to the Air
Calcium from gypsum can help decrease volatilization
loss of ammonium nitrogen from applications of
ammonia, ammonium nitrate, UAN, urea, ammonium
sulphate, or any of the ammonium phosphates.
Calcium can decrease the effective pH by precipitating
carbonates and also prevent ammonia loss to the
atmosphere by forming a complex calcium salt with
24. Increases Crop Yields
Gypsum-for various combinations of the above
effects-can substantially increase crop yields. From 10
to 40 percent is very common.