What is first square in cotton? @CottonInfoAust
What is first square in cotton? @CottonInfoAust
Uploaded February 2026 | Updated September 2026, 2 hours ago
'First square' in cotton is an important crop development stage - the point at which the crop begins its reproductive phase.
CottonInfo Technical Lead Paul Grundy explains the physiological definition of first square, and demonstrates how to determine whether your crop has reached this stage.
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What is 'first square' in cotton?

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