Is nitrogen really limiting rice yields (August 2001)

Angus, J Williams R


This IREC Farmers Newsletter present information the issue of pre flooded nitrogen verse top dressing and yield comparisons. The article states that trial work and computer models predict that pre flooded nitrogen is more efficient than top dressed nitrogen however grower experience would suggest otherwise. Possible reasons presented by researchers include over sampling at PI, pre flood loss of nitrogen, “insurance” application of nitrogen, poorly drained areas and paddock variation may explain pre flooded nitrogen application are not as efficient as agronomist expect. The article states that research for possible explanation continue.