Monday, 7 November 2005
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This presentation is part of: Nitrogen Management in Corn Production

In-Season N Management for Irrigated Corn Using Chlorophyll Meters.

Gary Varvel, John Shanahan, Wallace Wilhelm, and James Schepers.

Corn was grown in both continuous corn and corn/soybean cropping systems under irrigation in the Platte Valley of Nebraska. The objective of the study was to determine whether in-season N stress measured by using chlorophyll meters could be used to determine N fertilizer applications. Four corn hybrids differing in yield potential, maturity, and stay green characteristics were tested in both the monoculture and rotation systems in combination with five N fertilizer rates. In-season chlorophyll meter readings at various growth stages appeared to be indicative of various levels of N stress for the various preseason N fertilizer applications.

See more of Nitrogen Management in Corn Production
See more of S04 Soil Fertility & Plant Nutrition

See more of The ASA-CSSA-SSSA International Annual Meetings (November 6-10, 2005)