Paul Evans Johnston

Principles of Farm Management

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Yields of Corn Hybrids Harvested for Silage

And Methods to Determine the Best Time to Harvest

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A Study of the Cost of Horse and Tractor Power on Illinois Farms

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Twelve Years of Farm Accounts in Illinois

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Harvesting the Corn Crop in Illinois

An Economic Study of Methods and Relative Costs

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A Survey of Illinois Farm Labor in 1946

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How Valuable are the Soils of Central Illinois

A Ten-year Study of Selected Soils, Systems of Farming, and Relative Earnings

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Farm Real-estate Valuations in Illinois with Special Reference to Township Averages

An Analysis of 1930 Census Data and Supplementary Information for Previous and Subsequent Dates

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Crop Yields from Illinois Soil Experiment Fields in 1932 Together with a General Summary for the Rotation Periods Ending in 1932

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