Table 28-2. Accumulation of soil organic C in mine spoils covered with topsoil and seeded to big bluestem, little bluestem, orchardgrass, tall fescue, switchgrass, timothy, birdsfoot trefoil, and alfalfa (from Akala and Lal, 2001).

Reclamation duration

 

0-15 cm

15-30 cm
(yr)

 

--------- Mg ha-1 ---------

0

 
 

9.2
 

7.8

5

 
 

16.3
 

10.9

10

 
 

25.3
 

15.6

15

 
 

31.4
 

23.5

20

 
 

45.3
 

22.1

25

 
 

55.4
 

37.8

Pasture control (70 yr)

 
 

30.3
 

14.6

LSD(0.05) (Depth)

21.2
 

 

 
 
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Tall Fescue Monograph