Tue, Dec 12, 2017
10:00 AM to 10:50 AM
Tue, Dec 12, 2017
3:00 PM to 3:50 PM
Few investigations are available looking at the changes over time in nutrient uptake and yield, in addition to the study of nutrient stoichiometry as a metric of nutrient limitations in soybean. The presentation will be focused on: 1) understanding the historical changes on yield, total biomass, and nutrient (N, P, K) content and concentration in studies published from 1921 to 2016; 2) investigating the role of biological nitrogen fixation (BNF) as a main contributor of this nutrient to the plant; and 3) exploring the effect of management practices for closing yield gaps. Historical seed yield increase was primarily driven by increase in biomass rather than harvest index (HI) with also increasing NHI. Overall, contribution of BNF to plant N demand was 56%, representing a total contribution of 122 lbs N per acre. From a pragmatic viewpoint, the use of the best management practices (BMPs) impacted soybean yield, biomass and N uptake. Narrow row spacing, high seeding rate, and balanced nutrition increased partitioning efficiency for biomass and nitrogen, and consequently increased final yields. These findings have implications for soybean production and integrated nutrient management to improve yield, nutrient use efficiency, and seed nutrient composition.
During his time pursuing a Ph.D. at Purdue University, Ignacio worked as a research assistant, and was actively involved in the graduate students’ representatives committee. Ignacio received several honors among them, Marschner Young Scientist Award, Gamma Sigma Delta Professional Award, M.O. Pence Memorial Scholarship, Gerald O. Mott Award, Bilsland Dissertation Fellowship, Outstanding Ph.D. Student in Research Award, George D. Scarseth Scholarship, and the International Scholar Award from IPNI.
Currently, he is the Cropping Systems Specialist at Kansas State University, department of Agronomy. His research is connected to understanding the genotype x environment x management practices interaction, including crop physiology, production, remote sensing and modeling tools. He is also an Associate Editor for Crop Science Journal, and he is also actively involved in the reviewing process for several International Journals (i.e. Agronomy Journal, Crop Science, Field Crops Research, and Frontiers in Plant Science). He is also an active member of the Crop Science Society of America, American Society of Agronomy, the Soil Science Society of America, Sigma Xi, Gamma Sigma Delta, CAST and Epsilon Sigma Phi. He recently has received awards for his early professional career achievements such as the Early Career Awards for Epsilon Sigma Phi and Gamma Sigma Delta.
Ignacio married Gloria in 2007 and they have three children, Simon, Josefina and Jeremías. For recreation, Ignacio enjoys time spent with family and friends, the outdoors and cooking.
• Ph.D. Crop Physiology and Nutrition, Purdue University, 2012
• M.S. Soil Fertility & Plant Nutrition, Univ. of Buenos Aires, 2009
• B.S. Agronomy, University of Buenos Aires, Argentina, 2005