As ? decreases, binding of the water becomes stronger, and at small potentials ( more negative, approaching wilting point ) water is strongly bound in the smallest of pores, at contact points between grains and as films bound by adsorptive forces around particles.
12.
A particularly good example is the study by Hall et al . ( 1977 ) from soil in England and Wales; they established field capacity, permanent wilting point, available water content, and air capacity as a function of textural class, and as well as deriving continuous functions estimating these soil-water properties.
13.
With the introduction of the field capacity ( FC ) and permanent wilting point ( PWP ) concepts by Frank Veihmeyer and Arthur Hendricksen ( 1927 ), research during the period 1950-1980 attempted to correlate particle-size distribution, bulk density and organic matter content with water content at field capacity ( FC ), permanent wilting point ( PWP ), and available water capacity ( AWC ).
14.
With the introduction of the field capacity ( FC ) and permanent wilting point ( PWP ) concepts by Frank Veihmeyer and Arthur Hendricksen ( 1927 ), research during the period 1950-1980 attempted to correlate particle-size distribution, bulk density and organic matter content with water content at field capacity ( FC ), permanent wilting point ( PWP ), and available water capacity ( AWC ).
