RELATIVE FARM VALUE OE CROPS. 



43 



When we come to a consideration of the rotation which has given 

 the best results at those stations where two or more tests have been 

 made, we find less difficulty in reconciling the seeming diversity of 

 results. 



At Dickinson, N. Dak., rotation No. 1 gave the best results in 1908 

 and No. 2 in 1909. A change of 60 cents in the relative farm values 

 per acre in 1909 would have made No. 2 the best both years. It is 

 quite probable that a rotation of wheat on disked corn stubble, oats 

 on spring plowing, and corn on spring plowing would give better 

 results than either No. 1 or No. 2 at this station. 



At Edgeley, N. Dak., rotation No. 1 gave the best results in 1907 

 and 1908, while in 1909 No. 3 was best. The difference between No. 

 1 and No. 3 in 1909 was, however, only 23 cents per acre. These 

 two rotations differ only in that in No. 1 the corn stubble is disked 

 and in No. 3 it is plowed. It may therefore be inferred that No. 1 

 will give the best average results at this station. 



At Highmore, S. Dak., rotation No. 6 gave the best results one 

 year and No. 7 the next. These are both barley rotations. It may 

 therefore be inferred that barley is a profitable crop there, and that 

 neither the sequence nor the time of plowing is of great importance 

 in a 3-year rotation of corn, oats, and barley. 



At North Platte, Nebr., a different rotation gave the best results 

 in each of the three tests. The results in the 1909 tests were so affected 

 by adverse weather conditions in May as to have little significance. 

 In 1907 No. 4 and in 1908 No. 1 gave the best results. These two 

 rotations differ only in sequence. In both No. 1 and No. 4 grain was 

 sown on disked corn stubble, and the corn and other small-grain 

 crop were on fall plowing. It would therefore seem that at this sta- 

 tion disked corn stubble for one of the small-grain crops and fall 

 plowing for corn and other small-grain crops are the best methods 

 of preparation and that sequence is of relatively small importance. 



At Amarillo the crops all suffered so severely from drought in 1909 

 that the discrepancies in the results of the two years are not sig- 

 nificant. 



Comparisons of the several rotations will be made in discussing the 

 tables which follow. 



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