∴A-PEN
Importance of acidity measurement
when the soil is not neutral but acid or
alkaline:
- It is hard for plants to absorb nutritious
substances from the soil, because the substances do not dissolve
well in acid or alkaline soil.
- The soil is prone to fail to absorb
fertilizers.
- Plants have problems in development
of their roots and also in cell division.
- Harmful objects such as heavy metals
are soluble in such a condition.
- Profitable Microorganisms will decrease
and lose their vitality.
- Microorganisms will lose their balance
of life and mold will increase.
- Alkaline soil is harmful to the plants
as well as acid soil.
Measurement of Lime requirement
- improves acid soil into neutral soil.
This will help plants absorb nutritions and, on the other hand,
keep plants from absorbing heavy metals.
- hastens the transfer of carbohydrates,
so a plant will have strong roots, leaves and a
solid trunk.
- vitalizes microorganisms and prevents
damages by disease and harmful insects.
- improves the absorption of manures ,
especially phosphoric acid.
Measurement of SiO2 requirement
- A rice plant absorbs silicic acid about
8 times as much as nitrogen.
- (To produce 100 kilograms of rice, one
needs 1.8 kilograms of nitrogen and 14.8 kilograms of SiO2 .)
- SiO2 makes rice plants taste better.
- makes the leaves and the trunk more
solid, thus helps a plant bear the cold and the drouht better.
- makes plants tougher against disease
and harmful insects, such as rice
blight,
rice(stem) borer and so on.
Measurement of EC and Salt
- Excessive fertilization is a major cause
for accumulation of salts in soil.
- Generally, a plant only absorbs 40 %
of nitrogen and 15 % of phosphoric acid, and the rest could
be washed away or just remains in soil. But in agricultural
facilities, unlike open-air farmlands, the rest does hardly
be washed away, and just remains in soil, thus salts get accumulated
in soil.
- High density of salt hinders plants
in absorbing water or nutritions, what is worse, it can even
make the plants push out the water or nutritions from their
roots and cause dehydration.
- Not that long after the roots stop growing
and turn brown, the plant will be dead.
- Especially, plants in growth period
are very weak to salts.
Measurement of No3-N requirement
- If the content of No3-N increase in
agricultural facilities, density of salt will also increase.
High density of salt will ruin the quality of the farm products,
and also can make the plants absorb harmful chemical substances,
which can be bad for human body.
- Most of the rest of No3-N that is not
absorbed by plants moves to the water table. So, One can rather
measure the quantity of No3-N than to measure that of standard
nitrogen fertilization. This way, one can save 47 Kg of nitrogen
per 300 square-meter a year. Reduction of the use of fertilizer
is not only good for our environment but also financially profitable
for yourself.
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