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Soils, Water and Plant Growth
Goal of Irrigation: to recharge the available water
in the top foot of soil
Amount to irrigate depends on:
- Soil water-holding capacity
- Weather
- Site aspect
- Plants
grown and their growth stage
A plant water use calculator (evaporation
plus transpiration) is online at
http://hort.tfrec.wsu.edu/Orchard/PET/evapo.php
- On average, plants consume from 0.1 to 0.3 in of
rainfall or irrigation per day
- Sandy soils: Hold
between 0.5-1 in. of water per ft. soil
- Loams: Hold
between
0.8-2 in. per ft. soil
- Clay: Hold between 1.3-2.4
in. per ft. soil
Next page: Chemical
properties of soils
Updated
August 24, 2004
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