1. 1st Node Above Soil Surface
Figure 1. Accumulated water-use by evapotranspiration for hard red spring wheat in relation to plant development stage (Irrigated).
Flowering
Y = 0.110X X
n = 257
R2 = 0.87
X = Haun Stage of Development
Y = Water-use Inches.
Milk
Water-use Inches
1st Node Above Soil Surface
First Awns Visible
Tillering Begins
Flag Leaf Developed
Soft Dough {
5.6
11.4 {
11.6
13.0
14.0
14.5 {
15.0 {
15.5
Haun Stage of Development
Bauer, A., A.L. Black, and A.B. Frank Soil Water Use by Plant Development Stage of Spring and Winter Wheat. Exp. Sta. Bull North Dakota Agricultural Experiment Station, Fargo, ND. Modified
Hard Dough
Photos: Jack Kelly Clark, courtesy University of California Statewide IPM Project