Manganese dynamic in acid soil and uptake by maize seedlings

Abstract
Reports on manganese (Mn) soil tests in Brazil are not correlated either with total uptake of Mn by plants or plant growth response to added Mn salts. We have investigated the factors influencing Mn release in an acid soil and to better understand the Mn dynamic and uptake by maize seedlings. Soil preparation processes (air‐dry, oven‐dry, storage, etc.) significantly influenced Mn availability. Soil Mn extracted by 1M NH4OAc pH 7.0 was highly correlated with plant Mn. The use of a soil sample without drying seems promising for evaluting soil‐available Mn but the procedure still needs widespread evaluation.