The Forest WorkerU.S. Department of Agriculture, Forest Service, 1931 - Forests and forestry |
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acres additional Agriculture annual applied appointed Association average bark Bulletin burned cent charge classes club College commission common completed Conservation cooperation cost County cover crops decay Department diameter district early effect established Extension fact farm feet fire Forest Experiment Station Forest Service forestry given growing growth hectares height important inches indicate injury July June land leaves less measures methods Michigan miles National Forest natural normal North northern occurred offered operations organized Pacific parks period plans planted plot possible practically present progress protected quantity Quercus range region Ribes roads School seed seedlings showed soil southern species spring spruce stands timber tion trees types United United States Forest University usually West western white pine wood York