TEACHING ALL VOLUMES SUBMIT WORK SEARCH TIEE
VOLUME 2: Table of Contents TEACHING ISSUES AND EXPERIMENTS IN ECOLOGY
ISSUES: FIGURE SETS

Figure Set 4: Glyphosate Tolerant Soybeans

Purpose: To examine the usefulness of Roundup ready soybeans as compared to conventional varieties, analyzing both yields and herbicide use rates.
Teaching Approach: "formal group work"
Cognitive Skills: (see Bloom's Taxonomy) — comprehension, analysis, synthesis
Student Assessment: concept mapping

FIGURE SET 4

Figure 4a

Figure 4a. Glyphosate tolerant soybean adoption (from Marshall, USDA National Agricultural Statistics Service 2000).



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Figure 4b

Figure 4b. Herbicide use in soybeans (AR, IA, IL, IN, MN, MO, NE, OH) (from USDA National Agricultural Statistics Service 1991-2000).



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Figure 4c

Figure 4c. State average yield performance of Roundup Ready Relative to conventional varieties 1998 and 1999, (numbers are calculated as Roundup Ready / conventional crop yields, from Carpenter, J. E. 2001. Comparing Roundup Ready and conventional soybean yields 1999. National Center for Food and Agricultural Policy. January 2001).



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