22 CULTIVATION METHODS AND ROTATIONS FOR GREAT PLAINS. 



except that in No. 2 spring plowing has been practiced, while Nos. 1 

 and 3 are fall plowed. 



Rotations Nos. 2 and 3 are identical, except that spring plowing is 

 practiced in No. 2, while No. 3 is fall plowed. This will give an oppor- 

 tunity to compare spring with fall plowing both upon the rotations 

 as units and upon each of the several crops of the rotation. 



Rotations Nos. 1 and 4 have the same crops in each, but their 

 sequence is changed, oats instead of wheat being stubbled in after 

 corn, with wheat following oats instead of oats following wheat. A 

 comparison of these two wheat and oats crops will give some very 

 definite information concerning the proper sequence of these two 

 crops, as well as the proper relation of the corn crop to each. The 

 relative effect of wheat and oats upon the following corn crop can 

 also be studied. 



Rotations Nos. 1, 2, and 3 may be compared with rotation No. 5 

 to ascertain the relative merits of summer-fallowing and cropping 

 to corn as a preparation for a wheat crop, taking into consideration 

 that but two crops are grown in three years in the case of No. 5, while 

 three crops are grown in Nos. 1, 2, and 3. 



In rotation No. 6 a barley crop has been substituted for the wheat 

 crops which occur in all the preceding rotations. Many comparisons 

 may be made between these six rotations that will throw much light 

 upon sequence as well as cultivation. 



Rotation No. 7 is like No. 6, except that the relative positions of 

 oats and barley have been transposed. The same comparison may 

 be made with this as with No. 6. 



In rotation No. 8 we have another chance to compare summer 

 fallow with corn as a preparation for small-grain crops, oats being 

 the crop used to follow the summer fallow in this instance. A com- 

 parison of No. 8 with No. 4 will bring out the relative value of corn 

 and summer fallow as a preparation for oats, and a comparison with 

 No. 1 and No. 5 will show whether the best results will be obtained 

 from using wheat, oats, or barley as a crop to follow corn or summer- 

 fallow. 



Rotation No. 9 is identical with No. 3, except that the sequence is 

 changed. 



Besides the comparisons already mentioned, the list of which 

 might be indefinitely extended, each one of the nine rotations may be 

 compared as a unit with any other. 



We have seven crops of wheat growing each year, as follows: 



No. 1. Wheat after corn — stubbled in. No. 5. Wheat after summer fallow. 



No. 2. Wheat after corn — spring plowing. No. 8. Wheat after oats — fall plowing. 



No. 3. Wheat after corn — fall plowing. No. 9. Wheat after oats — spring plowing. 

 No. 4. Wheat after oats — fall plowing. 

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