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Kings River Flood Control Maintenance On-Farm Water Management AgLine Agricultural Water Enhancement Program
Field & Row Crop Water Use Tree & Vine Water Use Grass Reference Evapotranspiration
AgLine

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
Alfalfa
April Beans
May Beans
June Beans
Corn
Early April Cotton
Mid April Cotton
Early May Cotton
Grain
April Melons
May Melons
June Melons
July Melons
Pasture Grass
Safflower
March Tomatoes
April Tomatoes
Early Almonds
Late Almonds
Citrus
Olives
Grapes, Single Wire
Grapes, 4 ft Crossarm
Kiwis
Pistachios
Apples, Pears, Persimmons
Plums, Apricots
Low Chilling Stone Fruit
Later Variety Stone Fruit, Cherries
Early Walnuts
Late Walnuts

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.