SPEIItfG WHEAT IIST THE GEE AT PLAINS AEEA. 15 



The results of only two years are available for study from the 

 Huntley station. Both were years of good to heavy production, but 

 years when production was determined to a considerable degree by 

 the amount of water stored in the soil at seeding time. There was 

 consequently rather sharp response to those methods that start a 

 crop with more available soil water than others. 



The highest average yield, 25.9 bushels per acre, has been obtained 

 from summer tillage. The next highest yield, 24.1 bushels, has been 

 from the use of peas as green manure. Disked corn ground with a 

 yield of 22.4 bushels has been better than corn ground plowed either 

 in fall or spring. The data on the effects of fall and spring plowing 

 of either corn ground, wheat, or oat stubble being rather contradic- 

 tory and inconsistent among themselves, are hardly sufficient to admit 

 the drawing of conclusions. Indications are that marked differences 

 are not to be expected. The same lack of significant difference 

 exists between the yields from listing and plowing. The yields from 

 subsoiled land have just equalled those from land similarly treated 

 in every way except subsoiling. Green manure, on the average, was 

 productive of yields intermediate between those on summer-tilled 

 ground and those on cropped ground. The crop raised in 1913 where 

 peas were plowed under was much superior to that raised where barley 

 was plowed under. In 1914 there was little difference between the 

 crop after peas and that after winter rye. 



Wheat has been produced at a profit by all methods. The greatest 

 profit, $10.93 per acre, has come from disked corn land. This is due 

 both to high yield and low cost of preparation. Between fall plowing, 

 spring plowing, and fisting there is little difference, the profits from 

 them exceeding $3 per acre less than from disked corn ground. Sub- 

 soiling, on account of its low yield and higher cost, has reduced the 

 profits to $4.03 per acre. The high cost of production on summer 

 fallow has overcome the high yield to the extent that the profit from 

 it has been somewhat less than that realized from land cropped every 

 year. The least profit, $1 per acre, has been from the use of green 

 manure. 



WILLISTON FIELD STATION. 



The experimental work at the Wilfiston Field Station, in North 

 Dakota, is conducted on a silt soil that carries a considerable propor- 

 tion of available water and on which the depth of feeding is limited 

 only by the depth to which the character of the crop limits its devel- 

 opment of roots. 



The results of five years are available for study from Wilfiston 



station. The production for two of these years was very heavy, the 



average yield from all plats in 1912 being the highest yet recorded 



in this work. The year 1913 was one of good but not excessive 



85751°— Eull. 214—15 3 



