What two nutrients are considered critical from emergence to the first square in cotton?

The critical nutrients from emergence to the first square in cotton are potassium and phosphorus. During the early growth stages, cotton plants require adequate phosphorus to establish strong root systems, which is essential for nutrient uptake and overall plant development. Phosphorus plays a key role in energy transfer and photosynthesis, making it vital for the growth of healthy plants during this period.

Potassium is equally important during this stage as it contributes to numerous physiological processes, including water regulation, enzyme activation, and stress tolerance. Adequate potassium levels help the plant cope with environmental stresses and promote overall growth and development. It also aids in the processes of photosynthesis and nutrient transportation.

Both potassium and phosphorus are essential for the successful establishment of cotton, influencing early growth and development, which sets the foundation for the plant's ability to produce fruit later in the growing season. Thus, these two nutrients are considered critical from emergence to the first square in cotton production.