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Agristars: supporting research. spring small grains planting date distribution model
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hodges, T. |
| Copyright Year | 1981 |
| Description | A model was developed using 996 planting dates at 51 LANDSAT segments for spring wheat and spring barley in Minnesota, Montana, North Dakota, and South Dakota in 1979. Daily maximum and minimum temperatures and precipitation were obtained from the cooperative weather stations nearest to each segment. The model uses a growing degree day summation modified for daily temperature range to estimate the beginning of planting and uses a soil surface wetness variable to estimate how a fixed number of planting days are distributed after planting begins. For 1979, the model predicts first, median, and last planting dates with root mean square errors of 7.91, 6.61, and 7.09 days, respectively. The model also provides three or four dates to represent periods of planting activity within the planting season. Although the full model was not tested on an independent data set, it may be suitable in areas other than the U.S. Great Plains where spring small grains are planted as soon as soil and air temperatures become warm enough in the spring for plant growth. |
| File Size | 2314930 |
| Page Count | 34 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19820015707 |
| Archival Resource Key | ark:/13960/t8md3rf4q |
| Language | English |
| Publisher Date | 1981-03-01 |
| Access Restriction | Open |
| Subject Keyword | Earth Resources And Remote Sensing Barley Montana Earth Resources Program Soil Moisture South Dakota Minnesota Precipitation Meteorology Crop Calendars Weather Crop Growth Atmospheric Temperature Agristars Project Phenology North Dakota Agriculture Yield Mathematical Models Wheat Planting Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
