22 
Colorado Experiment Station 
Kind of Seed — ■ 
Taraxacum officinale. . . 
Ivactuca scariola 
Gaura parviflora 
I.«appula occiden tale . . . . 
Amaranthus powelli .... 
Brassica nigra 
Datura stramonium 
Brassica juncea 
Salvia lanceolata 
Cichorium intybus 
Plantago major 
Ambrosia artemisiifolia 
Camelina sativa 
Lepidium apetalum 
Sonchus oleraceus 
Eriogonum effusum .... 
Heracleum lanatum 
Aquilegia coerulea 
Polanisia trachysperma. 
Tragopogon porrifolius. 
Syntherisma sanguinale, 
Ambrosia trifida 
Amaranthus retroflexus. . 
Panicum capillare 
Conringia orientalis 
Chenopodium album 
Saponaria vaccaria 
Helianthus petiolaris . . . 
Senecio spartioides 
Polygonum persicaria. . . . 
Syntherisma humifusum. 
Kochia scoparia 
Euptoraium purpureum. . 
Kuhnia glutinosa.. 
Iva xanthifolia 
Eragrostis major 
Setaria viridis 
Setaria glauca 
Floated 
San 
100 
0 
95 
5 
95 
5 
99 
1 
46 
54 
35 
65 
, 100 
0 
26 
74 
25 
75 
78 
22 
48 
52 
100 
0 
65 
35 
82 
18 
100 
0 
100 
0 
100 
0 
20 
80 
52 
48 
100 
0 
100 
0 
100 
0 
41 
59 
96 
4 
17 
83 
36 
64 
50 
50 
79 
21 
100 
0 
82 
18 
100 
0 
20 
80 
100 
0 
100 
0 
100 
0 
o 
98 
4 6 
54 
94 
6 
GRAZING DITCH BANKS 
One of the most effective and economical ways of keeping’ 
weeds down along irrigation ditches is by grazing. Sheep, 
cattle, and horses are used for this purpose. The fencing and 
grazing of the larger irrigation ditches is becoming a more 
common practice, and one to be strongly recommended. It is 
believed that in a few years measures will be taken to compel 
