1. CASE 2: Corn Belt Soil Carbon & Other Options

2. Iowa Climate

3. Soil texture

4. Historic landcover 1840’s
Current landcover 1990’s

5. Iowa’s Agriculture -2003 Livestock Principal Crop Area – 1st
Hogs – 1st
Eggs – 1st
Milk – 12th
Sheep – 9th
Principal Crop Area – 1st
Corn production – 1st (1.8 billion bu)
Soybean production – 2nd (337 million bu)
Alfalfa Hay – 4th
Total Value of Agriculture – 3rd

6. Carbon Cycle
Grain produced on farms is fed to livestock for meat, eggs, or milk
Product is exported for consumption
Manure is applied to land area as a “nutrient resource”
Tillage systems are predominantly fall-chisel with spring operations, reduced tillage on less than 10% of cultivated area

7. 21.2 MMTC yr-1 on 149 Mha cropland
Century
21.2 MMTC yr-1 on 149 Mha cropland
Paustian et al.

8. Land Use for C Sequestration Management Strategies

9. Corn Belt Soil Carbon & Other Options
Biophysical Opportunities
Baseline and Uncertainity: Joel Brown
Permanence and Soil Equilibria: Tris West
Economics and Policy
Cathy Kling and Lyubov Kurkalova
Implementation Experience
Gordon Smith