Specifications may be obtained through this station for a large, 

 12-foot harrow intended for use with a 35 horsepower tractor, and a 

 smaller 6-foot model suitable for a light tractor cr horses. 



RAILS . 



Several types of rail drags have been improvised for breaking off and 

 pulling out sagebrush. They are built of railroad rails in various 

 patterns, but usually either as an :, a" pulled from the apex or as one 

 or more parallel beams which are pulled broadside through the brush. 

 Specifications are available at this station for two or three effective 

 models. 



LL0 T 7S . 



Llculdbcard plows are rather slow and expensive for use on range lands 

 but where they will operate satisfactorily are probably the most effec- 

 tive of any implement for destroying cheatgrass, perennial weeds, grasses, 

 and small brush. Their use is recommended especially for spring or late 

 fail plowing of cheatgrass-inf estad abandoned farm land, which is to be 

 spring seeded either to a preparatory cereal crcp or directly to grass. 



Pis}: plow s are about as expensive to use as mouidboard plows and may 

 net turn the surface litter under quite as well, but will operate in 

 rocks and brush and on certain floury-textured soils where a mouidboard 

 plow will not. 



The wheatland or cylinder plow does not turn the soil as effectively as 

 either the disk or mouidboard plows but can be used much more cheaply, 

 and has proved very effective for killing sagebrush and preparing a 

 seedbed for broadcast seeding in one operation. It seems to be the most 

 promising machine yet tested for sagebrush land that is not too steep 

 or rocky. Research paper No. 13 by Robertson and Piummer of the 

 Inte mount air. Station gives some helpful hints on use of wheatland plows 

 on sagebrush land (15), and shows how a drill box is sometimes mounted on 

 the plow. 



A stump jump plow , at present manufactured only in .Australia, has given 

 excellent performance in initial tests in the Intermountain Region on 

 rough, rocky, sagebrush land. It is a very ruggedly constructed disk 

 plow with the disks mounted in pairs on a knee-action arrangement. This 

 allows any pair of disks to ride over a rock without undue strain and 

 without throwing the whole plow out of the ground. It may be several 

 years before these or similar plows are generally available here. 



VI. FORAGE SPECIES FOR RA"GS RESLSDII'G Hi IIONTA!^ 



The following species were specifically suggested for use on certain 

 types of sites. This is not a complete list of species which might have 

 value, but includes most of those that can currently be recommended for 

 large-scale plantings and a few that can be recommended for use only on 

 a limited scale. 



-23- 



