[Zn(PDMA)] -is stable from pH 7 to 9 at all tested ionic strengths, particularly in waterlogged conditions, where competition with Cu II and Fe III is minimized by the reducing environment. For that reason, the most favorable soil conditions for a successful application of PDMA as Zn II fertilizer in paddy soils is providing free PDMA at pH 7-9 in flooded conditions. If we consider that 75% of rice cultivation is done under flooded conditions and alkaline soils, where Zn II is less mobile, the application of PDMA as fertilizer can significantly contribute to reduce Zn II deficiency in paddy soil.