WEATHER AND CORN MATURITY IN IOWA

Quasi-biennial corn yield cycles in Iowa

Quasi-biennial cycles are often reported in climate studies. The interannual El Niño Southern Oscillation (ENSO) and North Atlantic Oscillation (NAO) are two phenomena containing quasi-periodicities of approximately 2.5 and 2.2 years. It is known that ENSO affects corn yield throughweather patterns, NAO affects surface temperature and cloudiness, and surface temperature, rainfall, and radiation...

Soil Temperatures as Related to Corn Yield in Central Iowa

Soil temperature data collected a t the Iowa State College Agronomy Experimental Farm are analyzed in relation to corn yields. Some of the determining weather factors of soil temperature are evaluated. Monthly values of soil temperature at various levels are compared with corn yield in central Iowa and three physical relationships are discussed. In order to summarize the effect of these three r...

Psychiatry, technology, and the corn fields of Iowa.

This issue’s In Review section provides erudite overviews of 3 specific technologies and their current role in the field of psychiatry. Dr Rima Styra addresses the impact of the Internet—a powerful technology for accessing clinical and research information, obtaining online continuing medical education, and communicating with patients and colleagues. Dr Don Hilty and his colleagues offer a defi...

1998 Iowa Gold Catalog High-Oil Corn Test

Interactions of Nitrogen, Weather, Soil, and Irrigation on Corn Yield

but no difference in yields with increased N when the season was cool. Numerous factors that affect corn yield in the Northern Great Soil moisture status is also important in maintaining Plains are not considered in current N fertilizer recommendations. A maximum corn yields, and maintaining optimal soil moislinear model to describe the interactions of N fertility, weather, soil, ture is facili...