TABLE 8.-EFFECTS OF COVER CROPS ON


Plot**


 1


 2


 3


 4


Soil
Depth
Inches

 0-9
 9-21
 21-33

 0-9
 9-21
 21-33

 0-9
 9-21
 21-33

 0-9
 9-21
 21-33


1928
pH

6.13
6.03
5.93

6.20
5.80
5.86

6.13
5.66
5.80

6.12
6.03
6.03


1933
pH

6.32
6.18
5.86

6.35
6.18
5.85

6.40
5.86
5.90

6.26
6.01
5.83


THE NITROGEN AND ORGANIC MATTER CONTENT AND THE PH OF THE
 PECAN EXPERIMENT*.


 TOTAL NIRTOGEN
March September Gain or
1928 1933 Loss
Percent Percent Percent

0.042 0.048 +14.28
0.028 0.027 3.57
0.032 0.029 9.34

0.049 0.057 +16.32
 0.029 0.029 0
 0.032 0.031 3.12

 0.046 0.044 4.34
 0.034 0.032 5.88
 0.031 0.028 9.67

 0.048 0.059 +22.11
 0.033 0.033 0
 0.028 0.024 -14.28


March
1928
Percent

2.27
2.48

2.77
 1.93
 3.81

 2.48
 2.92
 5.33

 2.97
 2.68
 3.28


ORGANIC MATTER"


September
 1933
 Percent

 2.34
 1.87

 2.51
 1.87
 3.69

 2.30
 3.14
 4.98

 3.13
 2.99
 3.50


SOIL IN THE


Gain or
 Loss
 Percent

 + 3.08
 -24.59

 9.38
 3.10
 3.14

 7.41
 + 7.53
 S6.56

 + 5.38
 +11.57
 + 6.70



 -


 All determinations were made for that part of the
 *" See Table 2 for cover crops grown in each plot.
*** Determined by the loss on ignition.


soil which passed through a two millimeter sieve.


1___________