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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]Newsletter 2005 ] Field and Feedlot ] Stakeholder Report ] Soybean Aphid ] Soybean Rust ] Special Topics ] Crop Modeling ] Weather Data ] Yield Trials ] IA Crop Stats ] Subsoil H20 ]
[
ISU Extension][IA State University]

Fall 2001 Subsoil Moisture Survey Results

  • Counties:  Carroll, Sac, Crawford, Monona, Pocahontas and Ida
  • Date Sampled:  October 29 - 31

Graphs
Detailed Excel worksheet

Soil moisture status is quite variable across the region, depicting the variable rainfall that was observed during the summer and fall months. Subsoil moisture status ranges from a low of 0.7 inches (6% capacity) plant available water (PAW) under an alfalfa field in Monona County to 9.8 inches PAW (78% capacity) under a soybean field in Sac County. Most fields are in far better shape this sampling period compared to samples taken the last two falls. Generally, subsoil moisture status improves as you move north and east from Monona County.

Areas in Monona, Ida, Carroll and Crawford counties still require much needed rainfall to bring the soil profile up to Capacity. The five-foot soil profile ranges from 15% to 50% of capacity for PAW in these counties. Soil moisture reserves are by far the best in Sac and Pocahontas counties where the sample locations ranged from 50% to 80% of total potential PAW. All locations need to recharge soil moisture levels at the soil depth of 3 to 5 feet.

 

County

Site

Soil

Crop

Sample Date

Plant Available
Water (5 ft)

Inches %

Carroll

Heinen

Marshall Silty Clay Loam

Soybean

31-Oct

8.0

64%

Crawford

Steffen

Monona Silt Loam

Corn

31-Oct

2.1

18%

Crawford

Steffen

Monona Silt Loam

Soybean

31-Oct

4.3

37%

Ida

Schug

Monona Silt Loam

Corn

31-Oct

3.4

29%

Ida

Goodenow

Marshall

Corn

31-Oct

5.5

44%

Ida

Parker

Marshall Benches

Corn

31-Oct

7.3

59%

Monona

WIRF

Monona Silt Loam

Soybean

31-Oct

1.8

15%

Monona

WIRF

Monona Silt Loam

Corn

31-Oct

4.0

34%

Monona

WIRF

Monona Silt Loam

Alfalfa

31-Oct

0.7

6%

Sac

Buehler

Primghar

Corn

29-Oct

7.8

63%

Sac

Riniger

Galva

Soybean

29-Oct

9.8

79%

Sac

Berry

Clarion

Corn

29-Oct

8.5

77%

Sac

Graber

Canisteo

Soy bean

29-Oct

7.7

79%

Sac

Wilken

Marshall

Corn

29-Oct

6.2

50%

Pocahontas

Reigelsberger

Nicollett

Corn

2-Nov

6.2

56%

Graphs
Detailed Excel worksheet

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  

Newsletter 2005 ] Field and Feedlot ] Stakeholder Report ] Soybean Aphid ] Soybean Rust ] Special Topics ] Crop Modeling ] Weather Data ] Yield Trials ] IA Crop Stats ] Subsoil H20 ]

This page last updated on 01/26/05

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