In addition to calcium, wood ash contains 5-7% potassium and 1.5-2% phosphorous, both key nutrients for plants. Although it can be a decent fertilizer, McKinley points out that other fertilizers might ...

The right amount of calcium in the soil can help plants grow healthy and strong. Test your soil first to determine how much ...

Of all the heavy metals appearing as pollutants in agricultural soil, arsenic (As) poses the greatest threat to human health. As is a common pollutant in upland arable soils, which account for nearly ...