Soils have a natural characteristic called the cation exchange capacity (CEC) that allows them to hold (and exchange) cations (e.g., Ca+2 or Na+). These cations are held tight enough on the CEC that ...

Since the alfalfa in the rest of the field didn’t show any signs of potassium deficiency, I suggested that the farmer take a composite soil sample from just the high areas, which represented about one ...

Scientists have explored how to improve the PERSAM model used by the European Food Safety Authority (EFSA) in pesticide regulation. They have analysed the risks posed by four pesticides on two types ...