The Forest WorkerU.S. Department of Agriculture, Forest Service, 1931 - Forests and forestry |
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acres additional Agriculture annual Association average bark building Bulletin burned cent charge classes club College commission common completed Conservation cooperation cost County cover crops decay Department diameter district early effect established Extension farm feet fire Forest Experiment Station Forest Service forestry given growing growth hectares height important inches indicate injury June laboratory land leaves less measures methods Michigan miles natural normal North northern white nursery 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