Report of the National Conservation Commission, February, 1909: Accompanying papers: Lands, minerals, and national vitality
U.S. Government Printing Office, 1909 - Natural resources
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acre acreage agricultural Alaska ammonia amount annual average yield beds beneﬁt brands Bureau bushels census cent chieﬂy cities clover coal ﬁelds conservation considerable contain copper corn cost County crops cultivated death rate decrease deposits disease district drought estimated farm farmers fertilizers ﬁeld ﬁgures ﬁnd ﬁre ﬁrst ﬁve ﬂies ﬂy Geological gold grain Guano hematite High Grade hygiene important improvement increase industry inﬂuence insect iron labor land less lignite lime loss magnetite malaria manure material methods mineral mining mortality nitrogen oats output Paciﬁc peat petroleum Phos phosphate phosphoric acid placer plant food potash pounds practically present probably production proﬁt proﬁtable quantity reduced region result rock seed short tons soil South South Carolina South Dakota species square miles statistics supply timber tion tuberculosis typhoid United varieties waste wheat yield per acre York