Cropland Soils Module

Scenario:
Kentucky, North Carolina, and Tennessee have the greatest number of tobacco farms among tobacco producing states (Capehart, 2004) and lie in the heart of the “tobacco belt.” These farms tend to be small, averaging 175 acres total and typically averaging 8.4 acres of tobacco (Capehart, 2004). In terms of revenue from agriculture, Kentucky is the most tobacco-dependent state (Snell and Goetz, 1997). Tobacco buyout programs in the 1990’s, the end of tobacco settlement payments in 2005 (KY Tobacco Settlement Trust, 2009), and the end of tobacco farming subsidies has resulted in decreasing profitability in tobacco farming, especially in small farms. Decreasing profitability from tobacco farming is causing many tobacco farmers to diversify and/or to change crops entirely.

Your family has been growing tobacco for generations. They have many small fields scattered across the county. Since tobacco has been the only crop grown for years, no one has paid much attention to the soil types in these fields or to the mineral nutrients available in the soil. All they know is that when one field stops yielding well, they let it “go to grass” for a year or two before growing tobacco there again. Farming families are very proud of their agricultural heritage and want to ensure that their land will remain fertile for generations to come. It is very important to them that the farming practices used be as environmentally friendly as possible in order to maintain the balance of the ecosystems. Because your family wants to keep their land and continue in farming, they are considering crop rotation as a future farming alternative.
Concepts:
1) Soil Types; 2) Soil Erosion; 3) Soil-plant interactions; 4) Sustainable agriculture; 5) Geochemical Cycling;  6) Plant Nutrition
Standards:
Earth and Space Science (Std D): Properties of earth materials, Changes in earth and sky
Cycle A
Activities: Resource Files:
A1 (#1) - Planting seeds in soil samples Experimental design worksheet
A2 (#2) - Word wall for the module  
A3 (#3) - Characteristics soils  
A4 (#4) - Soil chemistry  
A5 (#5) - Soil distributions  
Cycle B
Activities: Resource Files:
B1 (#6) - Xylem system and transpiration  
B2 (#7) - Fruits and vegetables  
B3 (#8) - Major national and local crops  
B4 (#9) - Analysis of plant growth  
Cycle C
Activities: Resource Files:
C1 (#10) - Biogeochemical (Nutrient) cycles Crop information worksheet
C2 (#11) - Fertilizers and crop rotation Crop rotation worksheet
C3 (#12) - Final analysis and farming decisions Plant and soil interactions worksheet and Farming decisions worksheet
C4 (#13) - Class presentations