26 



BULLETIN 4, U. S. DEPARTMENT OF AGRICULTURE. 



It is not to be inferred that the above classification is absolute. 

 Owing to the adaptability of some species to a rather wide diversity 

 in soil-moisture conditions, a single species, as shown in the above 

 table, may fall under two classifications. TYTrile the classification is 

 necessarily general, it is believed that it will be helpful to stockmen 

 in the judicious selection of species to be used, since it indicates what 

 species may be used in locations of different moisture conditions. 

 Some will succeed in both the medium and dry situations, and some 

 in both the medium and wet. 



As has already been pointed out. the acidity of the soil, as well as 

 its physical structure and the corresponding moisture content, must 

 be ^considered in selecting a species for a given area. Redtop. for 

 example, make- the best growth and becomes permanently estab- 

 lished on moist, poorly drained soils of strongly acid character. 

 Timothy also does well on sour soils, but does not withstand the 

 degree of acidity that redtop does, while clovers fail completely 

 (for all practical purposes) in such habitats. On the other hand. 

 Australian saltbush. aside from being a dry-land plant, is adapted 

 to alkaline soils, which are antagonistic to the other species of low 

 moisture requirements. 



RELATIVE AMOUNT AND COST OF SEED PER ACRE. 



SEEDING TO ONE SPECIES. 



The way in which the seed is sown and the inexpensiveness of the 

 soil treatment makes the cost of the seed itself the heaviest item of 

 expense. The average cost per hundred pounds of choice seed of the 

 various species, and the amount required per acre to secure a full 

 stand on soils of high carrying capacity, follow : 



Table 7. — Amount of seed and cost per acre. 



Species. 



Pounds 

 per acre. 



Cost per 

 hundred- 

 weight. 



Cost per 



GRASSES. 



Canada blue grass. - - 



Slender wheat grass 



Hard fescue 



Italian rye grass 



Kentucky blue grass 



Orchard grass 



Perennial rye grass 



Redtop 



Smooth brome grass 



Tall meadow oat grass 



Timothy 



NONGBASSE 



Alfalfa 



Alfilaria 



Alsike clover 



Australian saltbush 



Bur clover 



Japanese clover 



Red clover 



White clover 



20 



$14.00 



20 



20.00 



15 



15.00 



20 



6.50 



- 



20.00 



15 



15.00 



20 



7.00 



15 



15.00 



20 



15.00 



20 



15.00 



- 



8.00 



- 



10.00 



8 



80.0 



- 



20.00 



20 



75.00 



- 



10.00 



10 



20.00 



- 



25.00 



s 



25.00 



S2.S0 

 4.00 

 2,25 

 1.30 

 4.00 

 2.25 

 1.40 

 2.25 

 3.00 

 3.00 

 .64 



.80 

 6.40 

 1.60 

 15.00 

 .80 

 2.00 

 2.00 

 2.00 



