Soil pH or soil reaction is an indication of the acidity or alkalinity of soil and is measured in pH units. Soil pH is defined as the negative logarithm of the hydrogen ion concentration. The pH scale ...

"It's not just soil pH or nutrient levels that make a difference, but rather a complete balance of what Mother Nature ...

But human activity is destroying the balance and one-third of the world’s soil is already degraded. Soil is fundamental to all life on earth. It filters our water and grows our crops.

Getty Images Alex Higgins, the sampling programme project lead, said each farm was unique but that the pH balance of soil in zones tested so far was below recommended levels. He said variations in ...