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100 bushels alfalfa American foulbrood amount of organic animals apiary bacteria beekeepers bees black-legged ticks bottomland soils brood brood combs brown winter tick calcium carbohydrates clover and grass colony color combs conservation contain contour farming cooling corn crop yields cropping system developed disease erosion EXPERIMENT STATION farm manure feed fields fleas ganic matter grain crops green manure grow grown grub gullies honey humus increase infested jars keep land large crop legume crops lespedeza lime livestock matter and nitrogen mellow ment Missouri farmers Missouri soils nitro oats organic mat phosphorus plant food elements plowed pollen pollen substitute potash potassium produce protein rainfall rains roots runoff runoff water seed ticks slopes small grain sod crops soil fertility soil organic matter soil treatments souri soybeans subsoil sugar syrup sulfa drug sulfathiazole supply much organic sweet clover teeth temperature terrace texture things topsoil toxaphene usually vegetative wheat wildlife