National Fertilizer Association. (1929). American fertilizer practices: A series of reports relating to the use of commercial plant food, presenting information obtained by a survey among 48,000 farmers in 35 states. Prepared and published by the National fertilizer Association.
Chicago Style (17th ed.) CitationNational Fertilizer Association. American Fertilizer Practices: A Series of Reports Relating to the Use of Commercial Plant Food, Presenting Information Obtained by a Survey Among 48,000 Farmers in 35 States. Washington, D.C.: Prepared and published by the National fertilizer Association, 1929.
MLA (9th ed.) CitationNational Fertilizer Association. American Fertilizer Practices: A Series of Reports Relating to the Use of Commercial Plant Food, Presenting Information Obtained by a Survey Among 48,000 Farmers in 35 States. Prepared and published by the National fertilizer Association, 1929.