Water and temperature affect many crop processes simultaneously ranging from crop growth, development, photosynthesis, respiration, water transpiration, grain fill, and nutrient cycling. The magnitude of high temperature or drought stress depends also on the stage of the crop. Another factor that should be considered is how high minimum temperatures are. Read full ICM News article Read more about Heat effects on corn and soybean crops
Crop water use (transpiration) during the growing season is a major factor in attaining high yield potential. Soil water loss (evaporation) and crop water loss (transpiration) occur simultaneously; making predictions of evapotranspiration complex. Read full ICM News article
Corn roots grow rapidly starting at the 4th-leaf stage and continue throughout vegetative development. This typically occurs from June to early July. Several factors affect root growth, but temperature and soil moisture are the most relevant factors in the absence of soil constraints. Read full ICM News article
The cold, rainy weather this past weekend has presented challenging conditions for corn fields that have already been planted. Now that the weather is improving it’s good to start thinking about what the consequences might be and what to look for. Heat unit accumulation has been negligible since April 26. Read full ICM News article
The 2016 crop year is in the books. While there were a couple of periods where it looked like the weather was going to have significant impact, it turns out only to be short lived. State average yields are projected to be a record for both corn (199 bushels per acre) and soybean (59 bushels per acre). Read more about the 2016 Crop Year in Review
The effect of cover crop on crop yields, soil health, and nitrate-nitrogen (N) leaching is complex and variable from year to year. From an environmental point of view, the higher the rye biomass production at termination day, the higher the likelihood of increasing soil organic carbon and decreasing N leaching. However, common asked questions are whether the magnitude of rye biomass is proportionally related to yield benefits or losses and how much water and N does rye use? Read more about Understanding rye cover crop effects on corn
FACTS is an ongoing project developed to forecast and evaluate in real-time soil-crop dynamics at specific ISU research fields (field scale) and at regional scale. Predictions will be frequently updated as new information becomes available. The project investigators and Iowa State University are not responsible for extrapolations made by individuals to other fields. Information from this website can be used for presentations without further permission if used in its entirety and credit is given to the Iowa State University FACTS project. Information from this website cannot be used in publications or other model improvement activities without prior permission of the project investigators.