This dataset consists of agronomic calendars for each growing season (year) when sunflower (Helianthus annuus L.) was grown for seed at the USDA-ARS Conservation and Production Laboratory (CPRL), Soil and Water Management Research Unit (SWMRU) research weather station, Bushland, Texas (Lat. 35.186714°, Long. -102.094189°, elevation 1170 m above MSL). Sunflower was grown on two large, precision weighing lysimeters, each in the center of a 4.44 ha square field. The two fields were the easternmost (NE and SE) of four square fields, which are themselves arranged in a larger square with the fields in four adjacent quadrants of the larger square. Fields and lysimeters within each field are thus designated northeast (NE), southeast (SE), northwest (NW), and southwest (SW). Irrigation was by linear move sprinkler system. Irrigations designated as full were managed to replenish soil water used by the crop on a weekly or more frequent basis as determined by soil profile water content readings made with a neutron probe to 2.4-m depth in the field. Irrigations designated as deficit typically involved full irrigation to establish the crop. A crop calendar for each season lists by date the pertinent agronomic and maintenance operations (e.g., planting, thinning, fertilization, pesticide application, lysimeter maintenance, harvest). For each season there is a crop calendar for the two lysimeters.
These datasets originate from research aimed at determining crop water use (ET), crop coefficients for use in ET-based irrigation scheduling based on a reference ET, crop growth, yield, harvest index, and crop water productivity as affected by irrigation method, timing, amount (full or some degree of deficit), agronomic practices, cultivar, and weather. Prior publications have focused on ET, crop coefficients, and crop water productivity. Crop coefficients have been used by ET networks. The data have utility for testing simulation models of crop ET, growth, and yield and have been used for testing, and calibrating models of ET that use satellite and/or weather data.
- 2009 Bushland, TX, east sunflower agronomic calendarxlsx
This agronomic calendar lists by date the agronomic operations on the...MD5:Explore Data17.27 KB
- 2011 Bushland, TX, east sunflower agronomic calendarxlsx
This agronomic calendar lists by date the agronomic operations on the...MD5:Explore Data24.21 KB
|Release Date|| |
|Spatial / Geographical Coverage Area|| |
POLYGON ((-102.09906463948 35.191719970106, -102.07671433134 35.19121493622, -102.07678299485 35.1865853205, -102.07609634934 35.177044674547, -102.09913330298 35.177072738625))
Ag Data Commons
|Temporal Coverage|| |
January 1, 2009 to December 31, 2011
|Contact Name|| |
Evett, Steven R.
|Public Access Level|| |
|Program Code|| |
005:040 - Department of Agriculture - National Research
|Bureau Code|| |
005:18 - Agricultural Research Service