№

Options

The initial amount of humus,

(1926 year)

After 20 years,

(1946 year)

After 40 years,

(1966 year)

After 60 years,

(1986 year)

After 80 years,

(2006 year)

After 96 years,

(2022 year)

%

t/ha

Cotton yield c/ha

%

t/ha

Cotton yield c/ha

%

t/ha

Cotton yield c/ha

%

t/ha

Cotton yield c/ha

%

t/ha

Cotton yield c/ha

%

t/ha

Cotton yield c/ha

Total gross yield in 96 years

The amount of hummus for 1 kg cotton yield

1

Every year 30 t/ha manure + 25 kg/ha Р₂О

1.84

68.45

-

1.83

0.33

29.2

1.74

3.68

32.6

1.53

11.40

31.4

1.18

24.44

27.5

0.964

32.58

32.7

306.8

0.108

2

NPK

250:175:125 kg/ha

1.42

53.25

-

1.24

6.48

31.3

1.27

9.22

37.8

1.07

10.09

32.5

0.96

16.95

29.7

0.878

19.65

33.9

330.4

0.059

3

Without fertilizer (control)

1.42

53.25

-

1.11

11.4

16.8

0.98

16.4

13.3

0.91

19.05

15.4

0.71

26.29

15.1

0.642

29.17

9.9

141.0

0.206