Soil Micronutrient Imbalance Threatens Beijing's Food Security
The study looked at the distribution of microelements in soil in Pinggu District of Beijing to help with fertilizer use. Soil samples were collected and analyzed for copper, zinc, iron, and manganese. The topsoil had higher levels of these microelements compared to subsoil. The spatial patterns of these microelements varied, with iron and manganese influenced by soil properties and land use affecting copper and zinc. Fertilizer and pesticide use led to higher copper and zinc levels, especially in orchards and vegetable fields. The study suggests paying attention to the potential harm to soil quality from these high levels.