146 



THIRD ANNUAL SESSIONS 



Column No. 



1. Yield of Oats on spring plowed land after Wheat. 



2. Yield of Oats on fall plowed land after Wheat. 



3. Yield of Oats on spring plowed land after Oats. 



4. Yield of Oats on fall plowed land after Oats. 



5. Yield of Oats on spring plowed land after Corn. 



6. Blank, no Oats having been grown on fall plowed Corn ground. 



7. Yield of Oats on land disked but not plowed after Corn. 



8. Yield of Oats on fallow or summer tilled land. 



9. Yield of Oats on land which had Rye plowed under for green manure. 

 10. Yield of Oats on land which had Peas plowed under for green manure. 



1>. Yield of Oats on land which had Sweet Clover plowed under for green manure. 



12. Yield of Oats on fall plowed land after Barley. 



13. Yield of Oats on fall plowed land after Flax. 



The lower half of this diagram shows the same data for Wheat that the 

 upper half does for Oats. 



yields obtained from the oat crop following wheat, either spring or fall 

 plowed, and that following oats spring plowed. The crop obtained from 

 oats following oats on fall plowed land was 3.2 bushels greater than for 

 oats following oats upon spring plowed land. The yield obtained from 

 the oat crop following corn upon spring plowed land, 33.9 bushels, was 

 \^ery nearly the same as that obtained from wheat land. The disked corn 

 land gave an average yield of 36.1 bushels, which was .5 bushels less 

 than the crop obtained from continuous cropping to oats upon fall plowed 

 land. The yield of oats upon fallow or summer tilled land was 44.5 bush- 

 els, being 7.9 bushels more than for continuous cropping to oats upon 

 fall plowed land. 



Soil Fertilization. 



"The yield obtained from the oat crop following rye plowed under 

 for green manure was 45.3 bushels, being 0.8 bushels higher for summer 

 tilled land. Upon land where peas had been plowed under for green 

 manure the yield was 40.8 bushels, being 4.5 bushels less than where rye 

 was plowed under and 3.7 bushels less than for summer tilled land. The 

 yield on land where sweet clover had been plowed under for green 

 manure was 44.9, being 0.5 bushels more than for summer tilled land, and 

 0.4 bushels less than for land having rye plowed under for green manure. 

 Crop Rotation. 



"The yield of oats following barley upon fall plowed land was 36 

 bushels, being 0.6 of a bushel of the same yield obtained where oats 

 followed oats. The yield of oats following flax, was 32 bushels per acre, 

 being 1.4 of a bushel less than continuous cropping to oats on spring 

 plowed land. It will thus be seen that averaging all the yields for all 

 the stations for the entire time we find that the highest yields (45.3 

 bushels), of oats was obtained by plowing under rye for green manure 

 and the lowest yield (32 bushels), from oats following flax. We can see 

 from this that the average results do not indicate that either crop 

 sequence or time of plowing produces any marked effect upon crop 

 yield. It is only when green manure is plowed under or the land is 

 allowed to remain fallow for the preceding year that any marked 

 increase in the crop is noted, and even these increases are too' slight 

 to warrant the additional expense of these practices so far as the im- 

 mediate crop is concerned. There are, however, other reasons why some 



