TSM Research Farm at Catlin, Illinois, USA     August, September 2002 Newsletter

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Water Use By Corn And Soybeans

By Randy Simonson, Technical Services Manager


Water is a very important component of crop production and is usually the limiting factor in crops that yield less than optimal.  Below is a chart, showing how much water corn and soybeans need to bring the crop to maturity.


Water Use by Corn

Stage of Growth Days to MaturityWater Needed to Mature Crop (Inches)
Blister 45 to 50 7.0 to 7.5
Milk 38 to 42 4.8 to 5.3
Dough 30 to 35 3.2 to 3.6
First Dent 23 to 27 2.1 to 2.4
Full Dent 19 to 21 1.6 to 1.8
1/2 Milk Line 12 to 14 0.9 to 1.2
1/4 Milk Line 6 to 8 0.4 to 0.6
 

Water Use by Soybeans

Full Flower 48 to 54 6.8 to 7.6
Full Pod 35 to 39 4.0 to 4.8
Begin Seed Fill 27 to 31 2.7 to 3.3
Full Seed Fill 16 to 18 1.1 to 1.4
Begin Maturity 9 to 11 0.4 to 0.7



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© 2002 TSM® Services, Inc.