Variable rate nitrogen management in corn: Response in two crop rotations

References

1. 1. Abendroth L.J.,
   2. Elmore R.W.,
   3. Boyer M.J.,
   4. Marlay S.K.

   . 2011. Corn Growth and Development. PMR 1009. Ames, IA: Iowa State University Extension.
2. 1. Baker J.L.,
   2. Timmons D.R.,
   3. Kanwar R.S.,
   4. Amos F.B. Jr..

   1995. Optimum time of nitrogen application to improve nitrogen use-efficiency and reduce leaching. Integrated Farm Management Demonstration Program Comprehensive Report, IFM 16, p. 4.3-4.5. Ames, IA: Iowa State University Extension.
3. 1. Barker D.W.,
   2. Sawyer J.E.

   . 2010. Using active canopy sensors to quantify corn nitrogen stress and nitrogen application rate. Agronomy Journal 102:964-971.

   OpenUrlCrossRef
4. 1. Barker D.W.,
   2. Sawyer J.E.

   . 2012. Using active canopy sensing to adjust nitrogen application rate in corn. Agronomy Journal 104:926-933.

   OpenUrl
5. 1. Delgado J.A.,
   2. Khosla R.,
   3. Bausch W.C.,
   4. Westfall D.G.,
   5. Inman D.J.

   . 2005. Nitrogen fertilizer management based on site-specific management zones reduces potential for nitrate leaching. Journal of Soil and Water Conservation 60(6):402-410.

   OpenUrlAbstract/FREE Full Text
6. 1. Doerge T.A.

   2002. Variable-rate nitrogen management creates opportunities and challenges for corn producers. Crop Management doi:10.1094/CM-2002-0905-01-RS.
7. 1. Schepers J.S.,
   2. Raun W.

   1. Fox R.H.,
   2. Walthall C.L.

   . 2008. Crop monitoring technologies to assess nitrogen status. In Nitrogen in Agricultural Systems, ed. Schepers J.S., Raun W., 647-670. Soil Science Society of America (SSSA) Monograph 49. Madison, WI: Soil Science Society of America.
8. 1. Holland K.H.,
   2. Schepers J.S.

   . 2013. Use of a virtual-reference concept to interpret active crop canopy sensor data. Precision Agriculture 14:71-85.

   OpenUrl
9. 1. Bruulsema T.W.,
   2. Fixen P.E.,
   3. Sulewski G.D.

   1. IPNI (International Plant Nutrition Institute)

   . 2013. 4R Plant Nutrition Manual: A Manual for Improving the Management of Plant Nutrition, 1st edition, eds. Bruulsema T.W., Fixen P.E., Sulewski G.D.. Norcross, GA: International Plant Nutrition Institute.
10. 1. ISU (Iowa State University) Agronomy Extension

    . 2012. Corn nitrogen rate calculator: Finding the maximum return to N and most profitable N rate. Ames, IA: Iowa State University Agronomy Extension. http://extension.agron.iastate.edu/soilfertility/nrate.aspx.
11. 1. Jaynes D.B.,
    2. Colvin T.S.

    . 2006. Corn yield and nitrate loss in subsurface drainage for midseason nitrogen fertilizer application. Agronomy Journal 98:1479-1487.

    OpenUrlCrossRefWeb of Science
12. 1. Khosla R.,
    2. Fleming K.,
    3. Delgado J.A.,
    4. Shaver T.M.,
    5. Westfall D.G.

    . 2002. Use of site-specific management zones to improve nitrogen management for precision agriculture. Journal of Soil and Water Conservation 57(6):513-518.

    OpenUrlAbstract/FREE Full Text
13. 1. Killorn R.J.,
    2. Voss R.D.,
    3. Hornstein J.S.

    . 1995. Nitrogen fertilizer management studies, 1987-1991. Integrated Farm Management Demonstration Program Comprehensive Report, 2.3-2.15. Ames, IA: Iowa State University Extension.
14. 1. Lawrence J.

    2014. Reducing nutrient loss: Science shows what works. SP 435. Ames, IA: Iowa State University Extension.
15. 1. Mallarino A.P.,
    2. Sawyer J.E.,
    3. Barnhart S.K.

    . 2013. A general guide for crop nutrient and limestone recommendations in Iowa. PM 1688. Ames, IA: Iowa State University Extension.
16. 1. Schepers J.S.,
    2. Raun W.

    1. Randall G.,
    2. Delgado J.A.,
    3. Schepers J.S.

    . 2008. Nitrogen management to protect water resources. In Nitrogen in Agricultural Systems, eds. Schepers J.S., Raun W., 911-945. Soil Science Society of America (SSSA) Monograph 49. Madison, WI: SSSA.
17. 1. Randall G.W.,
    2. Vetsch J.A.,
    3. Huffman J.R.

    . 2003. Corn production on a subsurface-drained mollisol as affected by time of nitrogen application and nitrapyrin. Agronomy Journal 95:1213-1219.

    OpenUrlCrossRefWeb of Science
18. 1. Ruiz Diaz D.A.,
    2. Hawkins J.A.,
    3. Sawyer J.E.,
    4. Lundvall J.P.

    . 2008. Evaluation of in-season nitrogen management strategies for corn production. Agronomy Journal 100:1711-1719.

    OpenUrlCrossRef
19. 1. SAS Institute

    . 2010. The SAS system for Windows. Release 9.1. Cary, NC: SAS Institute.
20. 1. Sawyer J.,
    2. Nafziger E.,
    3. Randall G.,
    4. Bundy L.,
    5. Rehm G.,
    6. Joern B.

    . 2006. Concepts and rationale for regional nitrogen rate guidelines for corn. PM 2015. Ames, IA: Iowa State University Extension.
21. 1. Scharf P.C.,
    2. Schmidt J.P.,
    3. Kitchen N.R.,
    4. Sudduth K.A.,
    5. Hong S.Y.,
    6. Lory J.A.,
    7. Davis J.G.

    . 2002. Remote sensing for nitrogen management. Journal of Soil and Water Conservation 57(6):518-524.

    OpenUrlAbstract/FREE Full Text
22. 1. USDA NRCS (Natural Resources Conservation Service)

    . 2015a. Water Quality Enhancement Activity—Precision application technology to apply nutrients. WQL11. Washington, DC: USDA NRCS.
23. 1. USDA NRCS

    . 2015b. Water Quality Enhancement Activity—Split nitrogen applications, 50% after crop emergence or pasture green up. WQL07. Washington, DC: USDA NRCS.
24. 1. USDA NRCS

    . 2015c. Water Quality Enhancement Activity—Apply enhanced efficiency fertilizer products. WQL32. Washington, DC: USDA NRCS.
25. 1. USDM (United States Drought Monitor)

    . Tabular Data Archive jointly produced by the National Drought Mitigation Center at the University of Nebraska-Lincoln, USDA, and the National Oceanic and Atmospheric Administration. http://droughtmonitor.unl.edu/.