Soybean Response to Inoculation with Bradyrhizobium japonicum in the United States and Argentina

• DOI: 10.2134/agronj2016.04.0214
• Publication Date: 2017-03-10T00:02:10Z
• Authors: Mary Leggett; Martin Diaz‐Zorita; Marja Koivunen; Roger Bowman; Robert Pesek; Craig Stevenson; Todd Leister
• Keywords: Bradyrhizobium japonicum; Bradyrhizobium; Crop Rotation

Core Ideas Soybean seed inoculation with Bradyrhizobium japonicum enhances grain production. Greater response happens in Argentinean sites than the United States. Several soil properties and crop management practices are related responses to inoculation. Although relevance of biological N nutrition soybean [ Glycine max (L.) Merr.] is recognized worldwide, shows variable results benefit needs be validated under current production practices. We conducted statistical analysis field trial data provide insight into factors affecting efficacy contrasting conditions. Most experimental sites, 187 trials States 152 Argentina, were soils history naturalized B. strains. Yield increases greater Argentina (190 kg ha −1 equivalent 6.39%) (60 1.67%). Tillage methods did not affect inoculant performance. In States, was more effective higher pH (>6.8) while greatest effect on occurred a lower (<5.5). where most rotation corn ( Zea mays L), positive observed late planted crops independent organic matter (SOM). had its no history, relatively high SOM, levels extractable P S, areas precipitation during early reproductive growing stages. both regions, yield due support regular use this practice help adequate conditions for