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Nitrogen Bacteria and Legumes / With special reference to red clover, cowpeas, soy beans, alfalfa, and sweet clover, on Illinois soils cover

Nitrogen Bacteria and Legumes / With special reference to red clover, cowpeas, soy beans, alfalfa, and sweet clover, on Illinois soils

By Cyril G. Hopkins
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About This Book

The bulletin explains the roles of two groups of bacteria in soil nitrogen cycling: nitrifying organisms that oxidize organic nitrogen to plant-available nitrates and nitrogen-gathering bacteria that form legume root nodules. It outlines soil chemistry requirements for nitrification, emphasizing the need for available alkaline elements such as calcium, oxygen, and the effect of acidity, lime, and phosphorus. Experimental results and practical recommendations address species-specific inoculation of legumes, noting cowpeas often carry suitable bacteria while soybeans and red clover generally require inoculation, and that infected sweet clover soil can effectively inoculate alfalfa. Methods to improve legume establishment and restore soil nitrogen are discussed.

About the Author

Hopkins, Cyril G. portrait

Cyril G. Hopkins

Cyril G. Hopkins was an influential figure in agricultural science, particularly known for his work in soil fertility and crop production. His notable publications include "The Farm That Won't Wear Out," which emphasizes sustainable farming practices, and "The Story of the Soil," where he explores the scientific principles underlying soil health and productivity. Hopkins also contributed to the understanding of nitrogen-fixing bacteria in legumes, as detailed in his work "Nitrogen Bacteria and Legumes." His research has had a lasting impact on modern agriculture, advocating for methods that enhance soil quality and promote sustainable farming.

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