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Soybean growth is divided into two main phases: Vegetative (V) stages and Reproductive (R) stages. The vegetative stages are characterized by leaf and node development, while the reproductive stages begin with flowering and include pod development, seed development, and plant maturation.

The reproductive stage R1, also known as the beginning bloom stage, is defined as having one open flower at any node on the main stem. This marks the start of the reproductive phase, even if the plant continues to produce new leaves and nodes.

It’s important to note that in indeterminate soybean varieties, which are common in many growing regions, vegetative growth can continue even after flowering has begun. 

“This overlap of vegetative and reproductive growth is a characteristic of indeterminate soybeans.“

However, the plant is still considered to be in the reproductive stage once flowering initiates, regardless of ongoing vegetative growth. The misconception that flowering soybeans are still in the vegetative stage may arise from this overlap in growth patterns. However, from a developmental standpoint, the appearance of flowers signifies that the plant has entered its reproductive phase, even if it continues to add leaves and nodes. Understanding these growth stages is crucial for proper crop management, as many agricultural practices and yield-influencing factors are tied to specific growth stages in soybeans

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