Corn Yield Response to Row Spacing and Plant Population in Iowa

Corn Response to within Row Plant Spacing

Key planting factors that influence corn stand establishment includes uniform depth and spacing of seed, correct seed population and optimizing the soil environment for rapid germination and uniform emergence. Other variables affecting stand establishment are seedbed quality (including soil moisture and temperature), seed quality and planter speed. Differences among fields for stand establishme...

Yield and Yield adjustments of nonprolific maize hybrids in response to plant population density

Plant Identification in Mosaicked Crop Row Images for Automatic Emerged Corn Plant Spacing Measurement

Image processing algorithms for individual corn plant and plant stem center identification were developed. These algorithms were applied to mosaicked crop row image for automatically measuring corn plant spacing at early growth stages. These algorithms utilized multiple sources of information for corn plant detection and plant center location estimation including plant color, plant morphologica...

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...