Refer to data from the following graphs and explain why crop rotation has been recommended to farmers rather than using fertilizers (L: low Nitrogen level, H: high Nitrogen level). What could be the potential outcome of using synthetic fertilizers in the ecosystem? Fertilizer Effect Crop Rotation Effect 100 100 • Corn Grain Sorghum 80 80 60 60 40 40 20 20 • Corn Grain Sorghum 2007 2008 2009 2010 2011 2012 2013 2007 2008 2009 2010 2011 2012 2013 Figure 2. Yield benefits from added fertilizer (average of L and H) decreased over time, but yield benefits increased over time by rotating crops (average across all 2-yr and 4-yr rötations). % Yield Difference (160 vs 0 lb N/ac) % Yield Difference (Rotated vs Continuous)

Refer to data from the following graphs and explain why crop rotation has been recommended to farmers rather than using fertilizers (L: low Nitrogen level, H: high Nitrogen level). What could be the potential outcome of using synthetic fertilizers in the ecosystem? Fertilizer Effect Crop Rotation Effect 100 100 • Corn Grain Sorghum 80 80 60 60 40 40 20 20 • Corn Grain Sorghum 2007 2008 2009 2010 2011 2012 2013 2007 2008 2009 2010 2011 2012 2013 Figure 2. Yield benefits from added fertilizer (average of L and H) decreased over time, but yield benefits increased over time by rotating crops (average across all 2-yr and 4-yr rötations). % Yield Difference (160 vs 0 lb N/ac) % Yield Difference (Rotated vs Continuous)

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter54: Ecosystems And Global Change

Section: Chapter Questions

Problem 9TYK: The amount of energy available at the highest trophic level in an ecosystem is determined by: a....

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