1142 ANNUAL REPORTS OF DEPARTMENT OF AGRICULTURE. 



Page. 



Soil, constituenta, orpanic, origin, identification, and study 613-015 



exhaustioii, possibility, causes, etc., discussion 150-151 



fertility, invest isjat ions by Soils Bureau 74-75, 013-615 



indicators, plant.'!, studies 420, 437 



invi'stisjations, work for 16 year.'^, review by Secretary 150-153 



oxidation, relation to fertility, study 614 



physics, study and investi<;ations for soil improvement 72-73, (il3 



samples, sets for educational uses 611 



surveys, area and location, 1912 605- 608 



cooperative work with States 608 609 



of national forests, proposed work 610 



reconnoissance, in States, demand for 610 



work in Great Plains region 71, 72 



work, areas, etc., review by Secretary 71-72, 151 



types, relation to crop rotation, note 152-153 



water, investitiations, Soils Bureau 615-616 



Soile Bureau, appropriation, disbursements, etc., 1912 689 



estimates and appropriations for 1913 702, 703 



officers, titles, and salaries 1090 



report of chief 605-616 



work, review by Secretary 71-75, 150-153 



heating, effect on fertility 615 



maladaptation to various crops, studies, remarks 152-153 



national forests, classification, cooperation of Soils Bureau 64, 72 



"sick," Porto Rico, studies 220 



tobacco, improvement, notes 129 



use of most important types, studies 611-612 



United States, description and classification 609-610 



Solar radiation, investigation and equipment. Weather Bureau. . 41, 186, 191, 265-266 



Solicitor, Oflice, review of work by Secretary 32-36, 248-258 



report, 1912 889^-1076 



scope of work, general statement 889-893 



Sorghum midge, control, note 122 



relation to dry land problem 10 



sirup, investigations by Chemistry Bureau 53, 566 



Sudan grass, introduction, note 121 



Sorghums, grain, experimental work, breeding, and uses 427 



investigations and new varieties 121, 122, 433 



South, beef production, notes 155, 323 



Carolina, Dillon, culvert built by department, items of cost, etc 868-869 



drug-plant work 409 



roads, inspection, etc 866-868, 872 



tobacco work 435 



corn-growing experimental work 142, 429-430 



dairy farming, introduction 156, 324 



Dakota, Bellefourche field station, work 448 



Experiment Station, plant-breeding work, results 213 



roads, items of cost, etc 860-861 



school lands, exchange for forest lands 65, 473-474 



fever-tick eradication 9 



Southern States. See South. 



Southwest, cotton-growing extension and conditions 406 



Sows, immunity from hog cholera 376-377 



Soy beans, investigations, culture, improvement, and oil content 433 



new varieties, introduction 121 



Sparrow, Engli.sh, habits and uses 81, 663, 664 



Sphaeropsis tuinefadens, cause of citrus-tree knot, control 395 



Sphenucus demersus, economic value, etc., studies by Biological Survey 670 



Spider, red, control studies, methods, etc 643 



cotton, area infected, and control experiments, methods, and 



cost 79, 629-630 



Spraying apple and peach, for diseases and insects 137-138, 397-398, 637-638 



codling moth for control, experiments 637-638 



Colorado potato beetle 642 



demonstrations, value in fruit pathological work 137-138, 400 



insects affecting citrus fruits, experiments 78, 645-646 



