Table 4. Visual obstruction and litter depth averages from previous studies (Kennedy 1994; Sedivec 1989) and current studies (2001-2002) for treatments surveyed at Central Grasslands Research Extension Center, Streeter, ND.

VOR

Litter Depth (mm)

(Quarter dm)

Study Area

Grazing Treatment

Previous

Current

Previous

Current

CRP (Kennedy 1994)

Rotational

Season Long

Idle

1.57

1.34

1.98

1.13

0.90

2.37

-

-

-

24.50

21.80

62.80

Native (Sedivec 1989)

Twice-over Rotation

Season Long

Short Duration 

Idle

1.17

1.15

1.19

2.25

0.77

1.17

1.15

1.90

-

-

-

-

32.00

35.30

34.70

71.54

Grazing Intensity

Low

Moderate

High

Extreme

Idle

-

-

-

-

-

1.26

1.14

0.57

0.20

1.90

-

-

-

-

-

56.25

46.59

20.44

9.26

71.54