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United States Department of Agriculture

Agricultural Research Service

Title: In-Season N Management for Irrigated Corn Using Chlorophyll Meters

Authors
item Varvel, Gary
item Shanahan, John
item Wilhelm, Wallace
item Schepers, James

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: August 1, 2006
Publication Date: November 1, 2006
Citation: Varvel, G.E., Shanahan, J.F., Wilhelm, W.W., Schepers, J.S. 2006. In-season n management for irrigated corn using chlorophyll meters. Agronomy Abstracts.

Technical Abstract: 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.

Last Modified: 7/25/2014
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