Handbook of Conservation |
Common terms and phrases
American Forestry annual Arbor Day arid lands birds Brown-tail bushels canals cent coal Congress CONSERVATION MOVEMENT cost cultivation drainage economic electric England exhausted extension farm farmer Federal fertility fire forest reserves Forest Service freight Government greatest ground Gulf of Mexico Handbook head-waters high-grade Hise HOME GARDENS Homestead Homestead Act improvement increase industry insects irrigation Lakes laws less loss Massachusetts methods mineral mining Mississippi National Conservation National Conservation Commission National Forests National Parks natural gas natural resources navigable nitrogen Orson phosphate rock phosphorus plant population possible practical present preserve problem production profit proper protected pruning quantity railroads railways rainfall reclaimed reservoirs rivers Roosevelt school garden slopes soil erosion streams street trees swamp Taft at St Theodore Roosevelt timber tion to-day Tree surgery tree warden twelve cubic feet United utilized waste waste land water power water supply wood