|Soil Texture||Available Water Inches/Foot|
|Fine Sand or Loamy Sand||1.0 to 1.1|
|Loam or Silt Loam||2.0 to 2.5|
|Silty Clay Loam or Clay Loam||1.8|
Silt loam soil AWC = 2.5 in./ft.
At silking, corn root depth = 3.0 ft.
ET estimate = 0.30 in./day
MB = 50%
Estimated soil moisture at 60% for 3.0 ft. rooting depth by hand-feel method or by moisture block readings.
AWC x root depth x soil moisture = available water
2.5″ x 3.0′ x 60% = 4.5″ available water
2.5″ x 3.0′ x 50% = 3.75″ MB / .75″ water left
.75″/0.30″ ET = 2.5 days moisture left