NAPRA Scenarios for the Southwestern Michigan
(Study area - Cass county)


  Cass county is located in the Southwestern Michigan.  In terms of the county soil survey, Kalamazoo loam is the predominent soil in the county (30%),  followed by Oshtemo sandy loam (15%) and Spinks loamy sand. The Kalamzoo soils are formed in loamy and sandy material, and well drained. Permeability in these soils is moderate in the upper part of the profile and rapid in the low part. The Oshtemo soils are also formed in loamy and sandy material with moderately rapid permeability. The Oshtemo series are well drained soils. Spinks soils are formed in sandy material, and well drained. These soils are moderately rapidly permeable or rapidly permeable.

   Annual precipitation in the county is about 33.6 inches of which approximately 19.7 inches is received during the growing season (May - October). Corn, soybeans and wheat are the main field crops in the county. Other crops include oats, dry beans, barley and hey. 

   A variety of pesticides including herbicides and insecticides  are used in croplands.  Among them are Atrizine,  Metolachlor and Metribuzin.
 

Pesticide losses from agricultural lands are affected by climate, soils, and tillage. Annual concentration and annual four-day maximum concentration of pesticide are used to assess the long- and short-term risk to water quality. Pesticide losses in runoff and percolation are used to assess the risk to surface and groundwater quality. The environmental risk of pesticide is also associated with pesticide properties such as toxicity and persistence. Select from the following to see a variety of scenarios:
 

 

1. Select a soil 

2. Select a crop 

3. Select a pesticide 

4. Select an application method 

5. Select an amount of pesticide (active ingredient) applied 

6. Is irrigation applied? No Yes

 

 

 

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