SPRING WHEAT IN THE GREAT PLAINS AREA. 25 
production of wheat at a loss ranging from 30 cents on listed land 
to $7.17 an acre on green manure. Generally speaking, the more 
expensive the method of preparation the greater the yield. But the 
yields did not increase in the same ratio as the expense; it accord- 
ingly follows that the less the expense of preparation the less the loss 
that attended the use of any method. 
SCOTTSBLUFF FIELD STATION. 
The work at Scottsbluff, Nebr., is conducted at a field station 
located on the North Platte Reclamation Project. The soil is a com- 
paratively light, sandy loam. At a depth varying from 5 to 8 feet 
there is a sharp break from this soil to either sand or Brule clay. 
Above this point the soil offers no unusual resistance to the downward 
passage of water or the development of roots. Owing to its light 
character, however, it is possible to store in it only a moderate pro- 
portion of available water. While the evidence on this point is not 
yet complete, the amount of water that can be stored in this soil is 
known to be somewhat intermediate between the corresponding 
amounts that can be stored in the Belle Fourche and North Platte 
soils. 
The results of three years are available for study at this station. 
All have been years of comparatively light yields, but one of them 
shows heavy production from one method. 
Spring plowing has been generally better than fall, irrespective of 
whether it were wheat, oat, or corn stubble that was plowed. Marked 
benefit was apparently derived one year from the use of manure in 
growing the corn that preceded one plat of wheat. 
Furrowing with a lister and leaving the ground rough through the 
winter instead of plowing was apparently beneficial one year, but of 
neutral value in the others. 
Disked corn ground was the second best method in one year, but it 
seemed to be of little benefit in increasing production in the other 
two years. Disked corn ground has each year given larger returns 
of wheat than were obtained by plowing it either in spring or fall. 
The results from green manure are not consistent either among 
themselves or in comparison with other methods. In average pro- 
duction it stands third on the list, being exceeded by summer tillage 
and disked corn ground. 
The highest yields each year have been obtained from summer 
tillage. This method has an average yield of 19.9 bushels per acre 
as against 14 bushels, the next highest average, from disked corn 
ground. 
