Hybrid-Maize (2006 Edition) (Software)
Hybrid-Maize is a computer program that simulates the growth and yield of a corn crop (Zea mays L.) under non-limiting or water-limited (i.e. irrigated or rainfed) conditions based on daily weather data. The purpose of this simulation model is to allow maize producers, crop consultants, and researchers to hypothetically explore the impact of weather and management changes on crop performance so that they might better understand site yield potential, year-to-year variation in yield potential, and possible management options that affect yield and yield stability. As with all simulation models, it represents a simplification of the real-world system and, as such, its predictions may differ from actual outcomes.
Hybrid-Maize allows users to:
- Assess the overall site yield potential and its variability based on historical weather data;
- Evaluate changes in attainable yield using different combinations of planting date, hybrid maturity, and plant density;
- Analyze corn yield in relation to the timing of silking and maturity in specific years;
- Explore options for optimal irrigation management;
- Conduct in-season simulations to evaluate actual growth up to the current date based on real-time weather data, and to forecast final yield scenarios based on historical weather data for the remainder of the growing season.
Hybrid-Maize does not allow assessment of different options for nutrient management nor does it account for yield losses due to weeds, insects, diseases, lodging, and other stresses. Hybrid-Maize has been evaluated primarily in rainfed and irrigated corn systems in the U.S. Corn Belt. Caution should be exercised when applying this model to other environments as this may require changes in some of the default model parameters. While Hybrid-Maize can be used without the Expanded Weather Database (available bundled or separately), many advanced users will find the extended information valuable.
Key improvements in the 2006 version of Hybrid-Maize include:
- WeatherAid: a utility for importing and managing weather data, including direct linkage to online data sources such as the High Plains Regional Climate Center (HPRCC)
- Batch run utility: run several fields or scenarios sequentially and compare the results
- Simplified data entry for initial soil moisture status
- Choice of units for displaying soil water content
- Display results for individual years in long-term mode
Users of earlier versions of Hybrid-Maize can download a free upgrade package. For further information visit the Hybrid-Maize Model Web site at www.hybridmaize.unl.edu or contact Dr. Haishun Yang at hyang2@unl.edu.
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