Adequate rhizobia populations help protect soybean yields
Unless there’s an abundance of N in the soil, the soybean plant will send out a chemical signal that attracts rhizobia bacteria to the roots. The bacteria invade soybean roots and establish colonies in rounded nodules on the roots. The plant supplies carbohydrates and minerals to the rhizobia, which then “fix” the N as ammonium, fueling plant growth and protein development.
“Rhizobia are living organisms,” says Keith O’Bryan, DuPont Pioneer agronomy research manager. “Any condition that affects the amount of oxygen in the soil can limit their numbers. Stresses such as drought, water saturation, high soil pH or sandy soils can curb rhizobia populations.”
Talk to your Pioneer sales professional for more information on nitrogen fixation and rhizobia populations.