1164 
Journal of Agricultural Research 
Vol. V, No. 25 
Table IV. —Effect of green clover and oats on the germination of cottonseed and soybeans 
No. 
Seed. 
Treatment. 
Germination. 
1 -week. 
2 weeks. 
3 weeks. 
Relative. 
Per cent . 
Per cent . 
Per cent . 
Per cent . 
1 
Cotton. . . . 
None. 
95 
IOO 
IOO 
IOO 
2 
1 per cent of oats. 
35 
35 
35 
35 
.do. 
1 per cent of clover.. 
10 
10 
10 
4 
Soybean... 
None. 
IOO 
IOO 
IOO 
IOO 
5 
1 per cent of oats .... 
40 
40 
40 
40 
6 
1 per cent of clover.. 
30 
60 
60 
60 
Here it was again found that the oil seeds are very sensitive to green- 
manuring. Soybeans are more resistant to this injury than cotton. 
As regards the source of the green manure, the results of numerous 
tests indicate that clover causes a greater loss than oat tissue. An 
exception to this is found with soybeans (Table IV). No satisfactory 
explanation has been found for the different action of these two sub¬ 
stances. The average of three total-nitrogen analyses shows that clover 
contains 80.27 P er cent °f moisture and 4.8 per cent of protein (dry 
basis). The oats contained 82 per cent of moisture and 3.96 per cent of 
protein. Chemical analyses fail to disclose any very striking differences 
between the clover and oat tissue. Indeed, the protein content is nearly 
the same in both substances. It is possible that the nitrogen of legumes 
is more available than that of nonlegumes (14). It was noticed repeat¬ 
edly that clover tissue decomposes more rapidly than oat tissue. 
EFFECT OF TIME OF PLANTING AND QUANTITY OF GREEN MANURE 
ON THE GERMINATION OF COTTON SEED 
Ten half-gallon jars were filled with soil and treated as shown in 
Table V. 
Table V. —Effect of time of planting and quantity of clover on the germination of 
cottonseed 
No. 
Treatment. 
'Germination. 
Planted immediately. 
Planted two weeks later. 
1 
week. 
2 
weeks. 
weeks. 
Rela¬ 
tive. 
1 
week. 
2 
weeks. 
weeks. 
Rela¬ 
tive. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
I 
None... 
90 
90 
90 
IOO 
90 
95 
95 
IOO 
2 
0.25 per cent of clover. . 
60 
60 
60 
66 
90 
95 
95 
IOO 
3 
0.5 per cent of clover ... 
50 
50 
$0 
55 
80 
95 
95 
IOO 
4 
.1.0 per cent of clover... 
35 
35 
35 
38 
IOO 
IOO 
IOO 
IOO 
2.0 per cent of clover. .. 
8* 
8e 
80 
I 
3.0 per cent of clover... 
/ D 
70 
85 
8S 
89 
