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 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.

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


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.

Proposed change in farming Practice

  • Current process has two steps:
    Step1: Lime Application;
    Step2: Fertilizer application in high quantities.
  • Proposed process: Application of fertilizers along with Minshakti(70% Fertilizers;30% Minshakti)
  • Minshakti leads to better absorbtion of fertilizers - hence lesser quantity required
  • Reduced fertilizer quantity offsets the cost of Minshakti
  • Reduced labour costs/hassles