ch. 1. Energy and climate implications for agricultural nutrient use efficiency / Adam J. Liska and Richard K. Perrin -- ch. 2. Nutrient management for improved energy efficiency / F. Mamani Pati, David E. Clay, and Gregg Carlson -- ch. 3. Using precision farming to overcome yield-limiting factors in southern Brazil Oxisols : a case study / Telmo Jorge Carneiro Amado and Antn̥io Luis Santi -- ch. 4. Collecting and analyzing soil spatial information using Kriging and inverse distance / David W. Franzen -- ch. 5. Integration of USDA-NRCS web soil survey and site collected data / Kurtis D. Reitsma and Douglas D. Malo -- ch. 6. Space, time, remote sensing, and optimal nitrogen fertilization rates : a fuzzy logic approach / Nicolas Tremblay ... [et al.] -- ch. 7. Digital northern great plains and zone mapping application for precision agriculture / Xiaodong Zhang -- ch. 8. Spatial variability of field machinery use and efficiency / Viacheslav I. Adamchuk, Robert D. Grisso, and Michael F. Kocher -- ch. 9. Precision manure application requirements / John Nowatzki -- ch. 10. Case study for improving nutrient management efficiency by optimizing the plant population / Gregg Carlson, David E. Clay, and Joseph Schefers -- ch. 11. Soil water status maps for variable rate irrigation / C.B. Hedley and I.J. Yule -- ch. 12. Maximizing nutrient efficiency through the adoption of management practices that maintain soil organic carbon : calculating carbon turnover kinetics / David E. Clay, Gregg Carlson, and Sharon A. Clay -- ch. 13. Predictive mapping of soil organic carbon : a case study using geographically weighted regression approach / Umakant Mishra and Rattan Lal --

ch. 14. Tillage and crop residue effects on soil carbon turnover using the Michaelis-Menten approach / Mahdi Al-Kaisi -- ch. 15. Geospatial management of Andean technology by the Inca Empire / F. Mamani Pati, David E. Clay, and H. Smeltekop -- ch. 16. Calculating energy efficiency of applying fresh and composted manure to soil / R.J. Wiederholt, Shafiqur Rahman, and A. Ehni -- ch. 17. Quantifying greenhouse gas (CO2, CH4, and N2O) fluxes from soil in a pasture / Nsalambi V. Nkongolo -- ch. 18. Improved nitrogen and energy-use efficiency using NIR-estimated soil organic carbon and N simulation modeling / Christopher J. Graham ... [et al.] -- ch. 19. Computing wheat nitrogen requirements from grain yield and protein maps / Daniel S. Long and R.E. Engel -- ch. 20. Review of low- and high-technology nitrogen management approaches for improved nitrogen use efficiency / Daryl B. Arnall and Robert W. Mullen -- ch. 21. Use of GIS-based site-specific nitrogen management for improving energy efficiency / Kevin F. Bronson, Peter C. Scharf, and Newell R. Kitchen -- ch. 22. Geographic information and the management of animal manure / D.A. Crouse and J.L. Havlin -- ch. 23. Spatial ramifications of crop selection : water quality and biomass energy / M.P. Russelle ... [et al.] -- ch. 24. Estimating soil productivity and energy efficiency using the USDA web soil survey, soil productivity index calculator, and biofuel energy systems simulator / Kurtis D. Reitsma, R. Kyle Heimerl, and Thomas E. Schumacher.