Why Measure pH

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Acidity>>--------pH7.0-------->>Alkalinity

The degree of soil acidity or alkalinity is measured by what is known as the pH scale. A figure of pH 7 represents a materials relationship to the neutral position of pure water at pH 7.0. Figures below 7 indicate increasing acidity and above 7 increasing alkalinity.

The optimum for general cropping is between pH 6.8 and 7.0.

Acid

 

Extent of Acidic Soils in Peninsular India

Acid soils are occur primarily in high rainfall, hilly / Mountainous and coastal regions. These regions in India are primarily used for food crops, horticulture and plantation crops. These soils are leached out of essential minerals and hence poor in fertility.

Area in Million Hectares Strongly Acidic
pH <
4.5essential
minearla
Moderately
Acidic
pH: 4.5- 5.5
Slightly Acidic
pH: 5.5- 6.5
Total
Karnataka  - 0.06 3.25 3.31
Kerala 0.14 2.87 0.75 3.76
Tamil Nadu 0.21 0.35 4.29 4.85
Maharashtra - 0.21 0.33 0.54
Goa - 0.11 0.19 0.30

Acid Soils are also found in the Himalayan region, Eastern and North Eastern Plains and several other zones in pockets.

 

Impact on Productivity and Liming Needs

  • Liming is the most natural and easy method of soil amendment and pH correction.
  • pH correction will lead to an increase in the yield (50% to 150%)
  • pH correction will decrease the usage of chemical fertilizers and bring savings
  • Lime will provide Ca and Mg as minerals necessary for growth
  • Lime will improve the soil structure and help in better growth of root systems
  • Active Lime also acts as insecticide

 

Fertilizers reduced efficiency due to soil acidity

Why Measure PH

Why Measure PH

pH is a scale that chemists use to measure acidity. Values < 7 are considered acidic Read More...

pH is a scale that chemists use to measure acidity. Values < 7 are considered acidic, values > 7 are alkaline and 7 is neutral. Most plants can tolerate a wide pH range in solution culture, but they cannot tolerate a wide range of acidity in the soil... Read More...

 

Latest News

Tattva Hical stood first in a competition held by Unconvention, a Villgro initiative, at Ahmedabad on 26th March'2016. THC's project of 'Granulated liming products' was recognized as an initiative with high social impact.

 

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