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Table 5 Effect of PR rates on P solubilization efficiency after four weeks incubation

From: Importance of phosphate pock application for sustaining agricultural production in Egypt

Rate, g/100 g soil

Sebaiya PR

Red Sea PR

Abu Tartur PR

Triple SP

 

Clay soil

0.05

17

11.2

13.2

13.1

0.1

13.6

13

15.5

14.1

0.2

9.18

16.4

16.6

25.7

0.3

13.5

14.1

26.2

12.3

 

Calcareous soil

0.05

6

12.3

6.7

12.3

0.1

12.4

3.6

7.2

10.1

0.2

14.1

4

10.2

14.1

0.3

11.8

7.5

8.5

24

 

Sandy soil

0.05

30.8

29.8

31.7

41

0.1

32.5

23.6

27

44.2

0.2

37

44.5

49.6

76.3

0.3

25.4

27

37.9

28