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Northwest Iowa Crops Page
by Todd Vagts
ISU Extension Crops Specialist
Counties Served:  Carroll, Calhoun, Crawford, Ida, Monona, Pocahontas and Sac.


[Home][ISU Extension][IA State University]

 

Fall 2002 Subsoil Moisture Survey Results

  • Counties:  Carroll, Calhoun, Sac, Crawford, Monona, Pocahontas and Ida
  • Date Sampled:  Oct 25 - Nov 1, 2002

The ISU Extension Fall 2002 subsoil moisture survey has been completed for Carroll, Calhoun, Crawford, Monona, Ida, Sac and Pocahontas counties.  Results form this fall’s sampling indicate that west-central IA is going into the winter season in much better (moisture) condition than normal.  

Most sampling areas have an equal or greater amount of plant available water in the top 60-inch soil profile compared to last spring’s samples, a result of very plentiful fall rains across the region.  When compared to the average fall moisture levels (1999 – 2002), the fall 2002 sub-soil moisture condition is about 150% of the 4-year average, with a range of 99% (soybean field near Dow City) to 204% (soybean field near Holstein).  On average across sampling locations, this is by far the best fall soil moisture condition the area has been in for the last several years. 

Carroll, Calhoun, Sac, Ida and Pocahontas counties have very good soil moisture profiles, averaging 9.6 inches of plant available water in the top 60-inches, 0.4 inches more than last spring and 2.7 inches more than last fall.  Carroll and Sac counties have the best sub-soil moisture profile with their PAW capacities filled to 93% and 89% respectively .  On the other hand, Monona and Crawford counties need substantial spring rains to replenish the soil moisture profile.  These 2 counties have an average of 4.8 inches (PAW), which is 41% of the soils holding capacity.  The soil profile in the driest counties needs to be recharged in the 36 – 60 inch depth level.

 

Graphs

        Sample Plant Available Water    60-inch soil profile
County Township Town Crop Date Inches % of Capacity
Carroll Washington Carroll corn 11/01/02 11.5 93.0%
             
Crawford Paradise Dow City soybean 11/01/02 3.0 25.9%
             
Crawford Paradise Dow City corn 11/01/02 7.3 62.6%
             
Ida Grant S-C Ida County soybean 11/01/02 7.6 64.8%
             
Ida Maple Battle Creek Corn 11/01/02 8.5 68.6%
             
Ida Griggs Holstein soybean 11/01/02 11.3 91.1%
             
Monona Center Castana Corn 11/01/02 4.4 37.9%
             
Monona Center Castana Soybean 11/01/02 5.2 44.2%
             
Monona Center Castana Corn 11/01/02 3.5 30.0%
             
Sac Richland Odebolt north Soybean 10/25/02 11.8 94.2%
             
Sac Eurek Schaller Corn 10/25/02 11.3 90.7%
             
Sac Jackson Sac City Soybean 10/25/02 12.8 94.2%
             
Sac Sac Auburn Corn 10/25/02 8.8 90.3%
             
Sac Wheeler Odebolt South Soybean 10/25/02 9.6 77.6%
             
Poke Roosevelt Gillmore City Soybean 11/01/02 8.5 76.4%
             
Calhoun Elm Grove Yetter Corn 11/01/02 8.0 72.2%

Graphs

Compare to Previous Falls...

      PAW - Inches % of Fall Average
County Township Town 2002 2001 2000 1999 2002
Carroll Washington Carroll 11.5 8.0 5.8   136%
               
Crawford Paradise Dow City 3.0 2.1 3.9 3.3 99%
               
Crawford Paradise Dow City 7.3 4.3 3.6 1.8 171%
               
Ida Grant S-C Ida County 7.6 3.4 1.8 4.0 181%
               
Ida Maple Battle Creek 8.5 5.5 1.2 2.5 192%
               
Ida Griggs Holstein 11.3 7.3 1.6 2.0 204%
               
Monona Center Castana 4.4 1.8 1.2   179%
               
Monona Center Castana 5.2 4.0 2.2   136%
               
Monona Center Castana 3.5 0.7 0.0   251%
               
Sac Richland Odebolt north 11.8 7.8 4.4 5.4 161%
               
Sac Eurek Schaller 11.3 9.8 3.8 2.3 166%
               
Sac Jackson Sac City 12.8 8.5 4.7 4.8 167%
               
Sac Sac Auburn 8.8 7.7 2.8 4.4 148%
               
Sac Wheeler Odebolt South 9.6 6.2 3.4 4.1 165%
               
Poke Roosevelt Gillmore City 8.5 6.2     115%
               
Calhoun Elm Grove Yetter 8.0       100%

*PAW = Plant Available Water

 

Todd Vagts
Iowa State University Extension
Field Crops Specialist
1240 D. Heires Avenue 
Carroll, IA 51401 
Office: 712-792-2364; Cell: 712-249-6025;  Fax: 712-792-2366
Email: vagts@iastate.edu  

 

 

This page last updated on 07/21/03

IOWA STATE UNIVERSITY
OF SCIENCE AND TECHNOLOGY

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