Crop Water Use
The AgLine information system provides crop water use information for the Kings River service area. Information provided for each crop includes:
- Crop water use for the past 7 days
- Predicted water use for the next 7 days
- Total crop water use season to date
These numbers, updated weekly, can be used to assist growers in irrigation management decisions. AgLine includes crop water use data for 31 cropping cases. To find information on a specific crop, locate the crop on the table below and click on one of the two general categories at the top of the table.
|Field and Row Crop Water Use
||Tree and Vine Water Use
Early April Cotton
Mid April Cotton
Early May Cotton
Grapes, Single Wire
Grapes, 4 ft Crossarm
Apples, Pears, Persimmons
Low Chilling Stone Fruit
Later Variety Stone Fruit, Cherries
Origin of AgLine Data
AgLine's crop water use data is derived from the California Irrigation Management Information System (CIMIS) station located in Parlier. The CIMIS station provides "reference evapotranspiration" (ETo) with grass as the reference crop.
Given the weather conditions, Grass Reference ETo approximates the amount of water used by healthy, well-maintained grass. Each week, the Grass Reference ETo data is downloaded and entered into a spreadsheet.
The water use for each crop (ETc) is calculated by multiplying the ETo by the crop coefficient (Kc) according to the following formula
ETc = ETo * Kc
Kc values are factors that correlate the ETo to each crop. Kc varies by crop type, time of year, and cultural practices. Values used by AgLine have been adjusted to match crop water use and grower practices in the Kings River service area.
For more information about crop curves or how reference evapotranspiration is obtained, please visit the CIMIS website at www.cimis.water.ca.gov.
Powdery Mildew Index
Information about the Powdery Mildew Index can be obtained from www.calagquest.com.