What is the effect of root conditions on manganese (Mn) availability in soil?

Root conditions play a significant role in the bioavailability of manganese (Mn) in soil. When root conditions are not optimal, such as when soil is compacted, excessively dry, or too acidic, the availability of manganese can be compromised. In particular, poor root conditions can lead to decreased aerobic and anaerobic microbial activity, which influences the transformation of manganese into forms that plants can absorb.

Additionally, in poorly aerated conditions often associated with root stress, manganese can become reduced and less soluble, thereby decreasing its availability to plants. Furthermore, in very acidic soils, while the availability of manganese can increase depending on the concentration, typically, adverse root conditions will exacerbate the situation, leading to decreased access to this essential nutrient.

Understanding the relationship between root health and nutrient availability is critical for effective nutrient management in agricultural practices. By ensuring healthier root conditions through practices like proper drainage or soil aeration, one can improve the manganese intake of plants, ultimately influencing growth and yield.