Commercial fertilizers are sold under a guaranteed analysis, and
generally at a price consistent with their fertilizing value. No
definite rule can be given for the kind or quantity of fertilizer to
be applied, as this varies with the crop and the land. At first the
only safe procedure is to use a good high-grade fertilizer at the
rate of from 1,000 to 2,000 pounds to the acre and note the results.
Market gardeners frequently apply as much as 2,500 pounds of high-grade
fertilizer per acre each year. Farmers who do not have sufficient
barnyard manure for their crops should begin gradually to use the
commercial fertilizers.--(F. B. 255.)