Core Ideas Nitrogen recommendations for individual corn fields are less accurate than
desired. Nitrogen recommendations need improvement for economic and environmental …

References........................................................................................................................................
43Discovery of the essentiality of nitrogen is often credited to de Saussure (1-3), who in …

Decomposition of forage legume‐grass (FLG) sods after turnover will supply N to the next
corn (Zea mays L.) crop. For optimum economic grain production typically a starter N …

Under semiarid Mediterranean conditions irrigated maize has been associated to diffuse
nitrate pollution of surface and groundwater. Cover crops grown during winter combined …

The concept of critical N concentration (Ncrit) assumes at any time a minimum shoot N
concentration necessary for maximum biomass production. For maize (Zea mays L.), Ncrit …

ABSTRACT High nitrate (NO3–N) concentrations in Iowa rivers have been linked to areas of
intensive row crop production, but they have not been experimentally linked to specific …

We compared six late‐season diagnostic tests for determining N adequacy in corn (Zea
mays L.) in a 3‐yr study in Pennsylvania. The six tests were:(i) the NO− 3–N concentration of …

Crop monitoring technologies to determine crop nitrogen (N) status include centuriesold
visual observations, decades‐old destructive and nondestructive plant component analysis …

Compared with corn (Zea mays L.) following corn, N guidelines for first‐year corn following
alfalfa (Medicago sativa L.) in the US Corn Belt suggest that N rates can be reduced by …

Core Ideas N application rate for corn should be estimated conditional to other influential
factors to N availability. Guided sampling by aerial imagery for end‐of‐season stalk nitrate …