161
Symposium--Crop Yield Gap Assessment for Global Food Security

Oral Session

Special Sessions

Growing demand for food in the coming decades asks for an substantial increase of the current global crop production. Given limited land suitable for crop production achieving highest possible yields on existing farm land is the only feasible solution to ensure food security while protecting carbon- and biodiversity-rich rainforests, wetlands, and grasslands. Quantifying the size of current exploitable yield gaps — the difference between current farm yields and yield potential — provides the basis for identifying regions best suited for agricultural intensification and helps to prioritize investments in agricultural research and development. This symposium will focus on opportunities to improve methods for quantifying yield gaps at local to global scales, and how to use and interpret yield gap assessment data. Two half-day sessions are proposed. The first half-day session will provide a general overview about the needs for yield gap assessments and recent advances in developed methods to estimate them, including choice of weather, soil and management data and crop models, validation of crop yield potential estimates, and up-scaling from local to national levels. The second half-day session will focus on case studies of yield gap analysis from data-rich regions such as USA and Europe, but also from data-poor regions such as Africa and Asia, encompassing cropping systems across a wide range of climatic, technological, and social conditions. The session will end with a summary presentation about progress in methods used for yield gap assessments and how to interpret the results that emerge from earlier presentations, followed by an open discussion.

Cosponsor(s):

Agronomic Production Systems, Global Agronomy
Tuesday, November 5, 2013: 8:45 AM-5:00 PM
Tampa Convention Center, Room 22 and 23
Organizer:
Patricio Grassini
8:45 AM
Introductory Remarks
8:45 AM
Yield Gap Assessment: Past, Present, Future.
Kenneth G. Cassman, University of Nebraska; Martin K. van Ittersum, Wageningen University
9:15 AM
Putting It All Together: Functionality of the Global Yield Gap Atlas Website.
Hendrik Boogaard, Wageningen University; Hugo L.E. de Groot, Wageningen University; Martin K. van Ittersum, Wageningen University; Kenneth G. Cassman, University of Nebraska; Joost Wolf, Wageningen University; Lenny G.J. van Bussel, Wageningen University; Justin P Van Wart, University of Nebraska - Lincoln; Patricio Grassini, University of Nebraska-Lincoln; Haishun Yang, University of Nebraska; Lieven Claessens, ICRISAT; Kazuki Saito, Africa Rice Center; Pepijn van Oort, Africa Rice Center
9:45 AM
Soil Data for Yield Gap Assessment and Soil Suitability Index for Sustainable Intensification.
Lieven Claessens, ICRISAT; Kenneth G. Cassman, University of Nebraska; Justin P Van Wart, University of Nebraska - Lincoln; Patricio Grassini, University of Nebraska - Lincoln; Bernard Vanlauwe, IITA; Martin K. van Ittersum, Wageningen University; Lenny G.J. van Bussel, Wageningen University; Hendrik Boogaard, Wageningen University; Jetse J. Stoorvogel, Wageningen University; Joost Wolf, Wageningen University; Haishun Yang, University of Nebraska
10:10 AM
Break
10:30 AM
Generating Long-Term Location-Specific Weather Data Where None Exist for Yield Gap Assessment.
Patricio Grassini, University of Nebraska - Lincoln; Justin P Van Wart, University of Nebraska - Lincoln; Haishun Yang, University of Nebraska; Kenneth G. Cassman, University of Nebraska
10:50 AM
Climate Zonations As Extrapolation Domains for Yield Gap Assessments.
Lenny G.J. van Bussel, Wageningen University; Justin P Van Wart, University of Nebraska - Lincoln; Joost Wolf, Wageningen University; Patricio Grassini, University of Nebraska - Lincoln; Hendrik Boogaard, Wageningen University; Hugo L.E. de Groot, Wageningen University; Lieven Claessens, ICRISAT; Haishun Yang, University of Nebraska; Martin K. van Ittersum, Wageningen University; Kenneth G. Cassman, University of Nebraska
11:10 AM
Estimating Yield Potential of Major Crops in Complex Cropping Systems of Bangladesh.
Jagadish Timsina, University of Melbourne; Patricio Grassini, University of Nebraska - Lincoln; Kenneth G. Cassman, University of Nebraska
11:30 AM
Impact of Warming On Wheat Yield Potential in India and Sudan.
Senthold Asseng, University of Florida; Davide Cammarano, University of Florida; David Lobell, Stanford University; Bruno Basso, Michigan State University; Uran Chung, International Maize and Wheat Improvement Center (CIMMYT); Matthew P. Reynolds, International Maize and Wheat Improvement Center (CIMMYT); Kai Sonder, International Maize and Wheat Improvement Center (CIMMYT)
11:50 AM
Open Discussion: Approaches and Methods
12:15 PM
Lunch Break
1:40 PM
Mapping the Yield Gap of Wheat in Australia: Reflections On Applying the Gyga Protocols.
Zvi Hochman, CSIRO; David Gobbett, CSIRO; Heidi Horan, CSIRO; Di Prestwidge, CSIRO; Javier Navarro Garcia, CSIRO
2:00 PM
Yield Gap Assessment and Prognosis for Self-Sufficient Maize Production in Ghana.
Samuel Adjei-Nsiah, Institute of Agricultural Research, University of Ghana; Lenny G.J. van Bussel, Wageningen University; Joost Wolf, Wageningen University; Justin P Van Wart, University of Nebraska - Lincoln; Patricio Grassini, University of Nebraska - Lincoln; Hendrik Boogaard, Wageningen University; Lieven Claessens, ICRISAT; Martin K. van Ittersum, Wageningen University
2:20 PM
Estimating Yield Gaps and Potential Rice Production in Sub-Saharan Africa.
Kazuki Saito, Africa Rice Center; Pepijn van Oort, Africa Rice Center; Suchit Prasad Shrestha, Africa Rice Center; Atsuko Tanaka, Africa Rice Center; Ibnou Dieng, Africa Rice Center; M. Wopereis, Africa Rice Center
2:40 PM
Food Security in West Africa: Is Self-Sufficiency Possible On Existing Farmland?.
Justin P Van Wart, University of Nebraska - Lincoln; Abdullahi Bala, Federal University of Technology-Minna; Kenneth G. Cassman, University of Nebraska
3:00 PM
Break
3:20 PM
Magnitude and Variability of Maize, Wheat, and Soybean Yield Gaps in Argentina.
Juan Pablo Monzon, Conicet; Fernando Aramburu Merlos, INTA; Jorge Mercau, Grupo de Estudios Ambientales CONICET Universidad Nacional de San Luis; Patricio Grassini, University of Nebraska - Lincoln; Fernando Andrade, INTA; Miguel A. Taboada, INTA - National Inst. of Agricultural Technology - Argentina; Antonio Hall, IFEVA; Kenneth G. Cassman, University of Nebraska; Esteban Jobbágy, UNSL Argentina
3:50 PM
How Much Sugarcane and Maize Production Is Possible in Brazil On Existing Farmland?.
Fabio Ricardo Marin, University of Săo Paulo - ESALQ; Geraldo Martha Jr., Embrapa; Kenneth G. Cassman, University of Nebraska; Patricio Grassini, University of Nebraska - Lincoln
4:10 PM
Assessment Of Wheat Yield Potentials and Yield Gaps In Morocco, Tunisia and Jordan.
Haishun Yang, University of Nebraska; Haithem Bahri, National Research Institute for Rural Engineering, Water and Forestry; Said Ouaattar, Institut Agronomique et Vétérinaire Hassan II; Muien Qaryouti, National Center for Agricultural Research and Extension (NCARE)
4:30 PM
Next Steps: Completing the Global Yield Gap Atlas by 2015
5:00 PM
Adjourn
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