1. North American Croplands Teki Sankey and Richard Massey

2. Master-file Primary layers – Cropland extent – Crop type – Crop intensity – Irrigated/Rainfed Secondary layers – Temperature – Precipitation – Elevation AttributeNameValue Cropland ExtentNon-Cropland0 Cropland1 Irrigated/RainfedRainfed0 Irrigated1 Crop TypeNon-Cropland0 Wheat1 Rice2 Corn3 Barley4 Soybean5 Pulses6 Potatoes7 Cotton8 Others9 IntensityNo crop0 Single crop1 Double crop2 Double+ crop3 TemperatureCelsius-value- PrecipitationCentimeters-value- Elevationmeters-value-

3. United States Cropland Distribution: 2008 (source: USDA CDL) Landcover typePixels% of total croplands % Sum Winter Wheat5902131913.5 Spring Wheat260753546.0 Durum Wheat44713851.0 Corn 137534136 31.5 Sweet Corn4841630.1 Pop or Orn Corn1355180.0 Rice44481421.0 Barley54204881.2 Soybeans 112384082 25.7 Lentils3817710.1 Cotton149038153.4 Potatoes14529500.3 Sweet Potatoes461820.083.9 Alfalfa212433574.9 Dbl Crop WinWht/Soybeans 100089902.3 Sorghum92745812.1 Sunflower32462090.793.9

4. Spectral database AttributeNameValue Cropland ExtentNon-Cropland0 Cropland1 Irrigated/RainfedIrrigated0 Rainfed1 Crop TypeNon-Cropland0 Wheat1 Rice2 Corn3 Barley4 Soybean5 Pulses6 Potatoes7 Cotton8 Others9 IntensitySingle crop0 Double crop1 Triple crop2 Triple+ crop3 TemperatureCelsius-value- PrecipitationCentimeters-value- Elevationmeters-value- Class IDBand 1Band 2………Band N Class 10.510.59………0.60 Class 20.500.58………0.66...………0.59...………0.46...………0.62...………0.61 Class M0.490.57………0.63 Cropland attributes Grouped classes for one set of attributes

5. Spectral database Isodata classification for each AOI + AgEco zone (2000 and 2007) Master file using CDL for 2007 and 2008 10,000 sample points per crop type for each AgEco zone Extraction of spectral signatures from NDVI time series data Corn, Irrigated, Single crop Wheat, Irrigated, Single crop Soybean, Irrigated, Single crop