1. Eric C. Miller SOIL 4213: Precision Agriculture April 15 th, 2013

3.  Improved seedbed environment ◦ Dryer and warmer soils ◦ Earlier planting ◦ Consistent seed depth ◦ Better plant stand  Net Return  Yield Response ◦ P and K fertilizer placement http://www.bighambrothers.com/strip-till-examples.htm

4. Tillage Emergence plants/foot V6 growth grams/plant V12 growth grams/plant Chisel Plow1.81.129 Strip tillage1.61.128 No tillage0.7 18 Data adapted from Wolkowski et al., 2009 Photo adapted from Vyn et al., 2008 No tillageStrip tillage

5. No tillageChisel plowSpring RM*Spring RM + ST $ ac -1 Corn cost*427447429450 Soybean cost157195163182 Rotational Avg.292320296316 *RM=residue management, ST=strip tillage **Costs include: labor, repairs, fuel, seed, fertilizer, herbicide, interest, drying fuel, and operating costs Data adapted from Archer and Reicosky, 2009

6.  Most common method  Increased vertical stratification of P and K http://www.lancoequipment.com/ http://www.farmequipmentfinder.com/view_item.php?id=2695  Potential improved fertilizer use efficiency Broadcast Banded

7. http://science.time.com/2013/04/02/report-predicts-ever-bigger-lake-erie-algae-blooms/

8. ab b Data adapted from Tarkalson and Bjorneberg, 2012

9. a a b Data adapted from Vyn et al., 2006

10. Photo adapted from Vyn et al., 2008 Planted on the strip Planted off the strip The strip

11. a c ab bc ab Data adapted from Vyn et al., 2008

12.  Improved seedbed environment  Net Return  Yield Response  Value of RTK No tillage Conventional

13. Questions?