Water Requirements of Crops - Equivalent Depth of Water in Irrigation

We have already studied different soil water and soil water constants. If not, please refer to the article Soil Water and Soil Water Constants.

Water Requirements of Crops - Equivalent Depth of Water in Irrigation
Image Courtesy: www.mvi.farm

At different soil state, the equivalent water depth will be different. We will discuss the equivalent depth formula for each state. The formula requires the specific gravity of soil (S) and the depth of the root zone  (d) along with the moisture content at each state of the soil.

Equivalent Depth of Water at Field Capacity

The Equivalent depth (dw) at field capacity (FC) is

dw = S x d x F.C

Equivalent Depth at Water at Permanent Wilting Point

dw at PWP is

PWP = S x d x PWP

Equivalent Depth at Available Water

dw of available water is

dw = S x d x (FC - PWP )

Equivalent Depth at Readily Available Water

dw = S x d x ( FC -OMC)

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2 Comments

techno said…
Thank you for sharing your blog. Based on your blog. I understand now that irrigation is very essential and powerful. I remembered, few months ago, we consulted Sprinkler Repair when our sprinkler irrigation broke.IRRIGATION INFO
steve said…
irrigation helps to grow agricultural crops, maintain landscapes, and revegetate disturbed soils in dry areas and during periods of less than average rainfall.