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100-pound rate 200 ____ __ Acre Rates ammonia 20 ammonia and treble amounts of sulphate Application of Commercial barnyard manures cent combination with 200 combinations upon acre delayed maturity EXPERIMENT STATION BULLETIN fertilizer applications fertilizer combination fertilizer program GAIN Pounds Pounds GAIN RATE YIELD gains in yield green manures growing season increased yields lbs and 100 manured and nonmanured manured plots maturity and netting MONTANA EXPERIMENT STATION Netted Gem potatoes nitrogen and phosphorus nonmanured land nonmanured plots organic matter plowed pounds of sulphate pounds of treble pounds per acre Pounds Pounds Pounds Pounds Pounds S.A. Pounds T.S.P.—Variab1e S.A. rate of application RATE YIELD GAIN S. A. Sulphate soil STATION BULLETIN 509 sulphate of ammonia sweet clover T.S.P. Treble superphosphate Treb1e Treble superphosphate 43 tubers variable amounts YIELD GAIN Pounds YIELD GAIN RATE yield of Netted ZOO lbs