Integrated Crop Management News
 

Document Type

Article

Publication Date

9-28-2010

Abstract

As of Sept. 27, nearly 91 percent of Iowa’s corn rates are “safe from frost” according to the USDA- NASS report indicating the majority of the crop isphysiologically mature (R6). The crop’s development is five days ahead of normal, 68 percent mature, and dramatically outpaces the 43 percent mature recorded in 2009 for the same week. Drydown remains as the last major in-field growing season process after the grain reaches physiological maturity – ‘black layer.’ The grain, although still connected to the cob, is disconnected physiologically from the plant because of the abscission or black layer - no further exchange of either nutrients or water between the cob and the kernel occurs.

Copyright Owner

Iowa State University

Language

en

File Format

application/pdf

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The Iowa State University Digital Repository provides access to Integrated Crop Management News for historical purposes only. Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user. Users should make their own assessment of the information and whether it is suitable for their intended purpose. For current information on integrated crop management from Iowa State University Extension and Outreach, please visit https://crops.extension.iastate.edu/.