128 



MAN ON THE LANDSCAPE 



Oak, 70, 71, 79, 80 



Oils, plant and animal, 14 



(see petroleum) 

 Organic matter, 7, 61, 88; materials of, 



49; processes, 10; in tropics,21 

 Organisms, 49, 59, 60, 66, 88, 90 

 Organization, 3, 4, 5, 6 

 Overgrazing, 10, 87, 97-8, 103 

 Overpopulation, 62, 102-3 

 Overview, 1, 3 

 Owl, 88 



Oxidation, 13, 88 

 Oxygen, 15, 52, 59, 61 



Paleontology, 50 



Palestine, 35, 41, 42, 74 



Parasites, 53 



Parran, Dr. Thomas, 40 



Passenger pigeon, 102 



Pasture, 3, 10, 12, 67; burned, 90, 91 



Pennsylvania Germans, 71 



People, abnormal, 1, 9 



Petroleum, 13 



Pheasant, 20, 106 



Phoenicia, 10, 41 



Phosphorus, 10, 20, 23, 24, 27, 89; 

 available, 23; lack of, 29 



Photosynthesis, 14, 15, 52, 68, 88 



Phyla, 53-5 



Physicist, 58, 87 



Pinchot, Gifford, 44 



Plains, 15, 23, 24, 69, 71, 107 



Plankton, 52, 53 



Plants, 4, 14, 59, 60, 68; aquatic, 88; 

 associations, 68; and climate, 74; 

 climax, 62 ; dead, 59 ; destruction 

 of, 72-5, 107; elements of, 4; en- 

 vironmental needs, 55-6, 72 ; evolu- 

 tion of, 48-56; flowering, 55; 

 forage, 22 ; fossil, 50 ; geography 

 of, 70-2 ; green, 14, 49 ; interrela- 

 tions, 61; kinds of, 53-6; more 

 needed, 40; nature of, 48-9; nutri- 

 tion of, 26, 28, 29 ; pioneer, 74, 75 ; 

 power stored in, 13, 59 ; quality of, 

 25, 28, 29; saprophytes, 49, 53; 

 succession, 72-80 ; succulence, 20, 

 22, 23; woody, 20, 22 



Plastics, 45, 46 



Pollination, 55 



Pollution, 52, 53, 88, 94-6, 98 



Pond, 54, 93 



Population, 10, 12, 36, 76, 99; controls, 

 62-4, 102-3; potential, 62; provid- 

 ing for, 14, 66; and resources, 102- 

 3 ; in tropics, 21 



Potassium, 17, 27, 28, 29 



Power, 5. 6, 7 ; atomic, 14, illus., 8 ; 

 output of plants, 16 ; raindrops, 82- 

 6; sun, 12, 18; water, 1 



Prairie, 23, 71, 99, 107 



Prairie chicken, 20, IOC 



Prairie dog, 20, 74 



Predation, 106 



Price, Dr. Weston, 31, 32 



Problems, landscape, 107 



Processes, organic, 10 



Production, 3 



Profit motive, 36, 107 



Proteins, 16, 17, 20, 48, 52; and soil, 



17, 60 



Proton, 4, 5 

 Protoplasm, 49 

 Protozoa, 16, 17, 60 

 Pteridophytes, 54 

 Puma, 106 



Quail, 101-2, 106 



Babbit, 77, 106; bones, 30; growth, 

 and soil, 32; sterility and soil, 33 



Eaccoon, 106 



Rain, 4, 5, 9, 105 



Raindrops, 7, 58, 83 ; effect on soil, 84, 

 illus., 85-6; splash, illus., 82. 



Rainfall, 70; per acre, 83-4 



Range, 3, 10, 89 



Reactions, natural, 83, 84, 104-6; of 

 raindrop, 83; violent, 99-100 



Reforestation, 70 



Relationships, 61, 62; (see interre- 

 lations) 



Reproduction, 49 ; controls, 62 ; soil 

 and, 32-4 



Research, 12 



Reserves, protective, 99, 100-2 



Reservoir, silting of, 96; illus., 97 



Resources, 4, 47; American, 35; man- 

 agement, 10; natural, 1, 67; and 

 population, 102 



Respiration, plant, 14 



Rice, and beri-beri, 17 



Rivers, 6; (see streams) 



Rock, 5, 20, 49, 54; decay, 24, 58; 

 mantle, 57; parent, 25, 69; vol- 

 canic, 15 



Roots, 48, 52, 59, 77, 87, 101; nodules, 

 17; rot, 27 



Rome, 25, 35, 42, 91 



Rubber, synthetic, 45 



Runoff, 93; illus., 7 



Salmon, 98 



Salts, 29, 57 



Sand, 13, 74 



Sandstone, 25 



Saprophytes, 49, 53 



Sassafras, 77, 78 



Science, 1, 83, 89, 104, 105 



Scrub, 52, 91 



Sea, 58; life in, 52 



Seed, 55, 62, 64, 75, 76, 77, 88 



Sewers, 6 



Shad, 98 



Shade, 69, 77, 80 



leaves in, 70 

 Shale, oil, 13 

 Shelter, 88, 98. 



