Moisture stress applied when 36% of the cotton bolls were normally set resulted in yield production of 1.47 bales per acre, as compared with 2.37 bales with normal irrigation. Subjecting cotton plants to moderate moisture stress during the peak of the fruiting period (even though followed by normal irrigations) resulted in a shift of boll set to later in the season—a delay causing many bolls at the top of the plants to be unopened at harvest time.

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