Curtis Publishing Company · Philadelphia, The Curtis publishing company · leaf 49
he crop yields per acre in normal times areapproximately double those of the United States.European agricultural experts estimate that in get-ting the mcreased yield, commercial fertilizer is atleast a 75 per cent factor. It might not be profitablefor American farmers to attempt to equal… … $3,600,000,000 PERSONAL
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Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
