New crop coefficients estimate water use of vegetables, row crops
To estimate the water use of vegetable and row crops, crop coefficients were developed using portable Bowen ratio instruments that were constructed and tested against lysimeters. These instruments measured evapotranspiration (ET) in fields of vegetable and row crops at var...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of California Agriculture and Natural Resources
1998-01-01
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| Series: | California Agriculture |
| Online Access: | http://calag.ucanr.edu/archive/?article=ca.v052n01p16 |
| Summary: | To estimate the water use of vegetable and row crops, crop coefficients were developed
using portable Bowen ratio instruments that were constructed and tested against lysimeters.
These instruments measured evapotranspiration (ET) in fields of vegetable and row
crops at various developmental stages. The crop coefficient was calculated at different
percentages of ground cover using a direct ratio between the ET of the crop and that
of a reference grass, which was calculated using meteorological data calculated from
local CIMIS weather stations. The crop coefficients for most of the crops increased
as the percentage of ground cover increased. |
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| ISSN: | 0008-0845 2160-8091 |