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Adding marl
to solve acid sulfate soil problem
Marl is Calciumcarbonate
which is loamy. It is found in Lop Buri, Saraburi and Nakhon
Sawan.
How to add
marl
Prepare marl
in the ratio suitable for soil acidity. Pile it up as a
small heap distributed in the area and scatter it throughout
the area before soil preparatio. Then, incorporate the soil
and leave it 2 weeks for reaction of soil to acidity before
planting. Such method is effective and safe because adding
marl only one time will solve acidity problem at least 5
years.
Although adding
marl can solve soil acidity problem, there are other factors
for plant growth and crop yield. Such fzctors are varieties
of plant, fertillzer and pesticide application, maintenance
and irrigation. Farmers should select suitable techniques
for their area.
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Ratio
of adding marl for acid soil reclamation
1. Growing
rice Add marl 2 ton/rai.
2. Planting
crops or vegetables Add marl 3 ton/rai.
3. Planting trees
Dig the furrow and move the soil surface to the end of the
furrow. Then, move below acid soil to the furrow border.
Dig the hole 50x50x50 cm. for planting. In the first year,
add marl 2 kg./hole and mix it with all of the soil in the
hole. Add marl 4 kg.,6 kg., 8 kg. and 10 kg. in the second
year, third year, forth year and fifth year respectively.
Scatter it around the crown radius increased every year.
Where marl
is available
Farmers can
buy marl at agricultural equipment store or at Phaputtabaht
District, Saraburi Province.
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