The three values – number of pods in stage R5 or higher, number of seeds per pod and seed size factor - go into Casteel's equation. For example, 250 pods times 2.5 seeds per pod divided by a seed size ...

Pay Attention to Soybean Growth Stages ... “The indeterminate varieties flower and add vegetative nodes simultaneously until R5,” he says. Determinate varieties grow vegetatively until R1, ...

At R5 and R6, drought will cause smaller beans. “If early planted soybeans run into stress at any of these stages, ... be careful not to burn soybeans in the reproductive stage.

Potassium is the most important yield-limiting nutrient in soybeans, and the plants can suffer a deficiency of it at multiple stages of growth. A new video produced by the University of Arkansas ...

Soybean plants begin to senesce or "shut down" once they reach the R5 growth stage, so insecticide applications are not enhancing yields at that point, Krupke said. "We don't have any mite-specific ...

R1 is the name given to the early flowering stage in soybean growth. There are eight stages of soybean plant reproductive growth, from R1—beginning blooming—to R8—full maturity.

More information: Chengjun Wu et al, Impact of flooding at the early reproductive growth stage on soybean yield and seed ...