INDEX 



Page 



Acre-foot, the, of water. ........ 258 



Aeration, soil acceleration by cul- 

 tivation and drainage .... W 



Agassiz Lake, the Ancient 44 



Agricultural sciences. * 



substances carry force 1* 



technology 6l 



Agriculture, Department. See 

 Department of Agriculture 



sciences related to. 25 



technical education in 



Air, movement in plants * 



movement in soil < 



spaces in soil ' 



the soil needs . . . - g 



Alkali soils 66, 138, 266 



excess of, washed out by irri- 

 gation 267 



Ancient Lake Agassiz I* 



Animals' dependence on plants. . 70 

 development from lower 



forms %2 



latent energy Zl 



Appliances, surveying and me- 



chanical 156 



Aqueducts, iron ^ 



wood **? 



Arable fields...... 120 



Ashes for road surfaces. ........ -^J 



Associations, State and National 

 good roads, promote road 



building 3; >4 



Assorted till, value as soil 4U 



"Backsetting" sod. ......... 3 



"Back sight" or plus sight , 



explanation 191 



Bacteria ^Q 



Bacteriology ,*2 



Barbed wire fences. ......... ^ 



Bargain hunting m buying farm . 94 



Barn buildings. Ji, 



Barnyards and paddocks *"/ 



Bicycle paths **' 



Blanket, dust " 



Blank forms, drainage io^ 



value *i 



Board drains z ^' 



Botany ,? 



Bracing corner posts ^^ 



Branch drains }^ 



Breaking prairie sod **, 



Breathing pores - - * 



Bridges 272,300, 301 



Brushing the land. . J* 



Buildings for specialties I 1 



Buildings, the barn 1 



Page 

 Bureau of Soils, Department of 



Agriculture, surveys 93 



Burning the surface peat 131 



Business, farming a good 



organization of the farm .... ' 



plan should be stable ' 



the farm the foundation of . . 89 



Capillarity 2 



Capstan plow ditchers 216 



Cement posts. 37.5 



Chains, surveyors 1 f 



Character of farm neighborhood. 91 



Chemicals "5 



Chemistry * 



Chlorophyll . ,f? 



Cities aid in road building 283 



Cities, good roads help 279 



Classification of soils ^ 



mechanical .5 



Clay soils, heavy, notes on 265 



mixing sand into, benefit. . . 137 



Clearing up timber lands 12 / 



Concrete culvert - 501 



Construction, culverts and small 



bridge structures 301 



ditches, farm supply and 



field 259 



road surface ^ 



survey for f 



surveying for 1^ 



tile drains ^ 



Contour survey or cross section . 174 

 Conveying water from source to 



farms L * L 



Co-operation in roadmaking, 



State encouragement of.. 284 



Corner posts, bracing 381 



Costs and profits, study. -.- 146 



data, notes by Maurice O. 

 Eldridge ....... 



Cost of clearing land of stumps. . \l$ 



crushed rock *g 



drain tiles * 



grading 296 



laying tile drains. .. 3 



roads of various widths ^v^ 



sand-clay roads 29s 



tiling per acre - * i:) 



Country life education and good 



roads 278 



institutions devoted to edu- 

 cation for , V ' 



Crops, certainty and quality of 



increase JjnJ 



need irrigation . *' 



rotation, provision for l" 



