Page:Popular Science Monthly Volume 78.djvu/263

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253
THE STORY OF A KING AND QUEEN
 
PSM V78 D263 Corn yield of 35 bushels without fertilization.png
1909 Corn, Where the Clover and all Crops are removed and no Treatment Applied: Yield 35 bushels per Acre.
 
PSM V78 D263 Corn yield of 79 bushels with partial fertilization.png
1909 Corn Where Clover and Crop Residues are plowed under and Limestone And Phosphorus Applied; Yield, 79 bushels per acre.
 
PSM V78 D263 Corn yield of 86 bushels with full range of fertilization.png
1909 Corn, where Manure, Limestone and Phosphorus are applied; yield, 86 bushels per acre.