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Table 1 Soil water stored in different soil layers after the sowing, seedling, and square formation stages of cotton in 2014 and 2015 (mm)

From: Soil replacement combined with subsoiling improves cotton yields

Year

Treatment

After sowing

Seedling stage

Square formation stage

0~20 cm

20~40 cm

40~60 cm

60~80 cm

0~20 cm

20~40 cm

40~60 cm

60~80 cm

0~20 cm

20~40 cm

40~60 cm

60~80 cm

2014

CK

63.0 a

62.9 a

55.2 b

44.0 b

55.8 b

54.9 b

54.6 b

44.3 a

31.2 b

27.9 b

37.5 a

37.8 a

T1

60.0 b

60.2 ab

57.4 a

45.2 b

54.5 b

57.5 a

57.1 a

43.7 a

38.3 a

26.9 b

37.7 a

38.6 a

T2

57.1 b

57.2 b

58.7 a

49.5 a

56.1 ab

54.8 b

56.3 a

45.4 a

37.8 a

36.6 a

36.7 a

38.6 a

T3

57.8 b

57.2 b

58.1 a

51.0 a

57.3 a

54.6 b

54.7 b

47.0 a

39.2 a

38.4 a

36.4 a

38.6 a

2015

CK

63.1 a

61.6 a

56.7 b

60.2 b

52.1 a

59.4 b

58.5 a

59.0 b

27.1 c

34.8 c

47.5 ab

54.4 a

T1

59.0 b

62.5 a

62.8 a

60.7 b

55.1 a

62.4 a

58.6 a

59.5 b

33.3 b

42.1 b

49.9 a

54.4 a

T2

57.4 b

58.0 b

63.4 a

63.6 a

54.0 a

57.4 b

58.5 a

62.7 a

31.3 bc

44.0 a

46.7 b

55.1 a

T3

57.8 b

59.1 b

62.6 a

63.7 a

56.0 a

58.1 b

58.2 a

62.5 a

36.4 a

45.0 a

48.0 a

54.9 a

  1. Note: The treatments were as follows: T1 (replacing the topsoil from 0~15 cm with the subsoil from 15~30 cm), T2 (replacing the topsoil from 0~20 cm with the subsoil from 20~40 cm plus subsoiling at the 40~55 cm layer), T3 (replacing the topsoil from 0~20 cm with the subsoil from 20~40 cm plus subsoiling at the 40~70 cm layer) and CK (rotary tillage within 15 cm). Different lower-case letters indicated significant difference between treatments within the same year