∴A-PEN

Importance of acidity measurement

when the soil is not neutral but acid or alkaline:

  1. It is hard for plants to absorb nutritious substances from the soil, because the substances do not dissolve well in acid or alkaline soil.
  2. The soil is prone to fail to absorb fertilizers.
  3. Plants have problems in development of their roots and also in cell division.  
  4. Harmful objects such as heavy metals are soluble in such a condition.
  5. Profitable Microorganisms will decrease and lose their vitality.   
  6. Microorganisms will lose their balance of life and mold will increase.
  7. Alkaline soil is harmful to the plants as well as acid soil.

Measurement of  Lime requirement

  1. improves acid soil into neutral soil. This will help plants absorb nutritions and, on the other hand, keep plants from absorbing heavy metals.
  2. hastens the transfer of carbohydrates, so a plant will have strong roots, leaves and   a solid trunk.
  3. vitalizes microorganisms and prevents damages by disease and harmful insects.
  4. improves the absorption of manures , especially phosphoric acid.

Measurement of SiO2 requirement

  1. A rice plant absorbs silicic acid about 8 times as much as nitrogen.
  2. (To produce 100 kilograms of rice, one needs 1.8 kilograms of nitrogen and 14.8 kilograms of SiO2 .)
  3. SiO2 makes rice plants taste better.
  4. makes the leaves and the trunk more solid, thus helps a plant bear the cold and the drouht better.
  5. makes plants tougher against disease and harmful insects, such as rice blight, rice(stem) borer and so on.

Measurement of EC and Salt

  1. Excessive fertilization is a major cause for accumulation of salts in soil.
  2. 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.
  3. 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.
  4. Not that long after the roots stop growing and turn brown, the plant will be dead.
  5. Especially, plants in growth period are very weak to salts.

Measurement of No3-N requirement

  1. 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.
  2. 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.

■reagent kit-case

  • how-to-use Video
  • wash bottle 300cc
  • waste-water-container
  • pH6.86 (buffer solution) 300cc
  • pH4.01 (buffer solution) 300cc
  • 0.01N (standard solution) 300cc

■case contents

  • A-PEN INSTRUMENT
  • PH ELECTRODE
  • CONDUCTIVITY SENSOR
  • TEMPERATURE
  • COMPENSATION SENSOR
  • PH4.01 STANDARD
  • PH6.86 STANDARD SOLUTION
  • 6 BEAKERS
  • 5G MEASURING SPOON
  • MANUAL BOOK

■SPECIPICATION

DIMENSION

  • INSTRUMENT: 23 X 14 X 6 Cm
  • CASE : 42 X 33 X 10Cm

WEIGHT

  • INSTRUMENT: 0.8Kg
  • CASE : 1.5Kg

carry-case is convinient to take
anywhere you want to test soil

 

 

 

Item

pH

EC

range

0.01 to 14.00 pH

0.1 to 99.99 ds/m

accuracy

±0.01 pH

±1% constant0.1-1.999

temperature

auto-compensation

auto-compensation

electrode

Ag-Agcl ref/comb

platinized-conductivity

practicaluse

LIME
requirement for neutralize acid soil
SILICA

No3-N
contents in soil

 

Auto power off
220/110 free Volt

 

 

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