Fig. 3
From: Photosynthetic characteristics of cotton are enhanced by altering the timing of mulch film removal
Soil volume moisture content variation of different soil layer at 33–128 days after emergence in 2017 in various treatment groups: 1 and 10 days before the first irrigation (T1, T10, respectively) and 1 day before the second irrigation (E1) after seedling emergence, with one control group of film mulching present across cotton plant growth stages (CK). A, B, and C represent removal of mulch on May 31, June 10, and June 20, 2017, i.e., 10 days, 1 day before the first irrigation, and one day before the second irrigation, respectively