Soil Capacity

Posted: September 21, 2011 in Soil capacity
Tags: , , ,

Introduction:

Soil is a reservoir for H20

Field capacity (FC) is the upper limit of water in the soil. Water stops.

Saturation: Max H20, water is flowing freely through soil.

Field capacity is expressed in in/ft or %.

Used to help determine : Plant available water (PAW)

FC is 25% by volume= with in 12′ of Soil, 25% is H20.

3/12=.25 or 25%

or 25%=.25 x 12=3/ft

Permanet wilting point. (PWP)

if PWP is 15.4%, what is PWP in inches per foot.

15.4=15.4/100=.154.154×12’=1.85

Three main stages:

Saturation-

Field Capactity ( Soil resevoir is full) and can no longer pull water…

Permanet wilting point-

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