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.
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, part of the editorial board of Field Crops Research and Frontiers of Plant Science. He recently has received the America Society of Agronomy Early Career Award and the Young Crop Scientist Award, Early Career from the Crop Science Society of Agronomy.
Ignacio married Gloria in 2007 and they have three children, Simon, Josefina and Jeremías.
• 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