10 
CoLOiiADO Experiment Station 
lliis is (lone, however, the salt can be remove(i from the soil 'by ^ 
Hooding- and proper drainage during a feAv seasons. 
All the above suggested methods of eradication apply to the 
])lants already established in the soil. Generally peppergrass seed 
in the soil will not retain its vitality for more than two seasons. 
Seed, therefor, which is already in the soil, would be destroyed by 
the above treatments, especially clean cultivation, smothering, or 
the salt treatment. 
As has been noted previously, it is far easier to prevent its intro- 
duction than to eradicate the plant when once established, and it 
is the purpose of this report to impress upon farmers the pecessity 
of combating this weed before it becomes a serious and widely dis- 
seminated pest. 
