U.S. flag

An official website of the United States government

Other Access

The information on this page (the dataset metadata) is also available in these formats:

JSON RDF

via the DKAN API

Data Extent

USDA-ARS Colorado Maize Water Productivity Dataset 2012-2013

Maize field

The USDA-Agricultural Research Service carried out an experiment on water productivity in response to seasonal timing of irrigation of maize (Zea mays L.) at the Limited Irrigation Research Farm (LIRF) facility in northeastern Colorado (40°26’ N, 104°38’ W) starting in 2012. Twelve treatments involved different water availability targeted at specific growth-stages. This dataset includes data from the first two years, which were complete years with intact treatments. Data includes canopy growth and development (canopy height, canopy cover and LAI), irrigation, precipitation, and soil water storage measured periodically through the season; daily estimates of crop evapotranspiration; and seasonal measurement of crop water use, harvest index and crop yield. Hourly and daily weather data are also provided from the CoAgMET, Colorado’s network of meteorological information (https://coagmet.colostate.edu/ ; GLY04 station). Additional soil data can be found in a previous dataset (USDA-ARS Colorado Maize Water Productivity Dataset 2008-2011) also available from the Ag Data Commons. This previous dataset included six targeted treatments that were generally uniform through the season. This new dataset can be used to further validate and refine maize crop models.

The data are presented in a spreadsheet format in individual sheets within one workbook. The first sheet in the work book provides a list of data descriptions. Two sheets (one sheet for each of the two years) provide the hourly weather data, with the exception of the precipitation data, which is included in the sheet with daily data per treatment. The weather data is from a weather station on site. Another sheet provides plot level data (harvest index, yield, annual ET, maximum LAI, stand density, total aboveground biomass) taken annually by plot (four plots per treatment). Another sheet provides LAI measured four times over each season per plot. The final sheet provides daily data per treatment over each season, including data needed to compute daily water balance. This sheet has LAI, crop growth stage, plant height, estimated root depth, interpolated canopy cover, ET coefficients, precipitation, and estimated deep percolation, evaporation, and soil water deficit at four soil depths.

List of files:
LIRF small plots map 2012-2013
LIRF maize annual_daily_hourly data 2012-2013

FieldValue
Tags
Modified
2019-08-05
Release Date
2018-06-04
Frequency
Irregularly
Identifier
b432d393-f178-49d4-99df-ab48e30d65ad
Spatial / Geographical Coverage Area
POLYGON ((-104.63916890323 40.446194880627, -104.63916890323 40.449232121566, -104.63449113071 40.449232121566, -104.63449113071 40.446194880627))
Spatial / Geographical Coverage Location
N.E. of Greeley Colorado; 40°26’ N, 104°38’ W
Publisher
Ag Data Commons
Temporal Coverage
January 1, 2012 to December 31, 2013
License
Data Dictionary
Contact Name
Comas, Louise
Contact Email
Public Access Level
Public
Program Code
005:040 - Department of Agriculture - National Research
Bureau Code
005:18 - Agricultural Research Service