PERCENTAGE YIELD OF EACH CROP EN' EACH STATE. ETC. 457 



haustion ; but may uot this increased yield during these later years 

 have been owing t') the occurrence of other favorable conditions, the 

 continuance of which for the future we may uot safely predict? 



If, as we have done with the several states, we calculate the average 

 acreage yield of wheat and corn throughout the country for the fii^st 

 and last half of this period, we shall find that, previous to these later 

 years of unusual production, the averages had fallen so low as to al- 

 most overcome this increase in the wheat, and to more than do so in 

 the case of the corn. 



AVERAGE ACREAGE YIELD FOR XTN'ITED STATES. 



Bushels. 

 VTheat—lST.:? to 1S71, inclusive, equals 12.06 



l!S72,to 1S80, inclusive, equals 12.47 



Corn — is<>;{ to 1X71, inclusive, equals 27.69 



1S72 to ISSO, inclusive, equals 26.78 



The increase in wheat, though including these four year.- of unusual 

 production, is only 3.4 per cent ; while the decrease in the yield of 

 corn, thuugh including the past six years of good crops, amounts to 

 3.3 per cent. 



For the purpose of studying this matter more thoroughly, as also for 

 the purpose of throwing s-ome light upon these results, I have grouped 

 the several states as follows, and have calculated the above results for 

 the several groups. 



1st. The Xew England and Middle States, viz.: Maine, Xew Hamp- 

 shire, Vermont, Massachusetts, Rhode Island, Connecticut, Xew York, 

 Pennsylvania, ]S^ew Jersey, Delaware, ilarylaud. 



2ud. The South Atlantic and Gulf States, viz.: Virginia, West Vir- 

 ginia, North Carolina, South Carolina, Georgia, Florida, Alabama, 

 Mississippi, Louisiana, Texas. 



3rd. The Central States, viz.: Ohio, Michigan, Indiana, Illinois, 

 Kentucky, Tennessee, Missouri. Arkansas. 



4th. The N^orth-western and Western States, viz.: Wisconsin, Min- 

 nesota, Iowa, Kansas, Nebraska, California, Oregon. 



In 1879 there was pr.)duced in the United States 1,547,901,790 

 bushels corn, valued at 8580,486,217; 448,756,630 bushels wheat, 

 valued at 8497,756,630. 



Of these aggregates, there was produced in each of the several sec- 

 tions of country, classified, as follows : 



