. Medical research and human welfare; a record of personal experiences and observations during a professional life of fifty-seven years . he soilof our farms. One method of soil inoculation is by trans-ferring soil rich in bacteria from a prior crop —clover, alfalfa, etc. — to poorer soil, two hun-dred pounds or more of rich soil over an acreof poor soil. The bacteria of the rich soil mul-tiply enormously and are diffused all throughthe poor soil. A slightly different method is provided forfarms with no rich soil. A liquid pure cultureof the needed bacteria it sprinkled over onehundred to two
. Medical research and human welfare; a record of personal experiences and observations during a professional life of fifty-seven years . he soilof our farms. One method of soil inoculation is by trans-ferring soil rich in bacteria from a prior crop —clover, alfalfa, etc. — to poorer soil, two hun-dred pounds or more of rich soil over an acreof poor soil. The bacteria of the rich soil mul-tiply enormously and are diffused all throughthe poor soil. A slightly different method is provided forfarms with no rich soil. A liquid pure cultureof the needed bacteria it sprinkled over onehundred to two hundred pounds of the poorsoil and thoroughly mixed. This enriched soilis then spread over an acre of poor soil, whenthe same process of diffusion goes on. Another and simpler method is to soak theseeds to be planted in a pure culture of thebacteria for a short time in the evening, drythem, and sow them the next morning. But thesun is an enemy of both good and bad bacteriaand the treated seed must not be sown in sunnyweather. They can be kept for a week or soand still be in good condition, ready to be sownin cloudy weather. 152. Fig 1. Kitrogen-fixing Nodules of the Garden Pea ^H Pl^lll ^^M H y^^^^^^^^K^^^^M ^B H^l ^^^^^^^H^L- ^^^i^:J^^^^^^^^^^^ ^^^^^^^^^1 ^^^^^^^^^^^^^^^^1 ^^H^^^^^^^^H
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