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Excerpt from To Establish Agricultural Extension Departments: Hearing Before the Committee on Agriculture and Forestry, United States Senate, Sixty-Second Congress, Second Session on S. 4563
I want to speak, for instance, of the work of Dr. Hopkins down in Illinois. Dr. Hopkins has for years been laboring on this p of soil fertility. He is one of the greatest of our soil chemists in America, and I will give you an instance to Show the efficacy of his work. They have something like 50 or 60 of these demonstration farms in the State of Illinois. Thev go to these farms and first make a soil diagnosis. Now, that is the essence of all curative processes, first to start with a diagnosis. If you have anything the matter with you you want your hysician first to make a proper diagnosis, and, gentlemen, we are a ready reaching the stage where we have to have a soil doctor; we are reaching the stage where we have to know what the condition of that soil is, and Dr. Hopkins goes out and makes these investigations of the soil and finds out whether the soil lacks in phosphate, lacks in potash, or lacks in nitrogen, and then applies the remedies. Let me give you one case which Dr. Hopkins told me about down in Illinois. Down near Egypt, in th southern part of Illinois, where the land is poor, they started one of these demonstra tion farms, and Dr. Hopkins's analysis showed that that soil was lacking in phosphate, and that an application of worth of phosphate to that soil would change it from a soil that would nor mally yield from 12 to 13 bushels of corn to one which would yield from 50 to 60 bushels. N ow, that is a fact which Dr. Hopkins told me about. They started this demonstration farm at one of those sections, called in the farmers from all the surrounding counties and called a meeting, at which the pointed out the value of rock phos phate as a remedy to a deplete soil in restorin the fertility.
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