Nothing is impossible to labour, aided by ingenuity.  The true objects of the agriculturist are likewise those of the patriot. Men value most what they have gained with effort; a just confidence in their own powers results from success; they love their country better, because they have seen it improved by their own talents and industry; and they identify with their interests, the existence of those institutions which have afforded them security, independence, and the multiplied enjoyments of civilized life.

Contents

The Yearbook Committee:  PAGE IV
Foreword, by Clinton P. Anderson, Secretary of Agriculture  page V
A Note to the Reader  p. VII

     Backgrounds
Men Who Went Before, by Ernest G. Moore  p. 1
What Is Farm Research? by Charles E. Kellogg  17

     Animals
Breeding Better Livestock, by Ralph W. Phillips  33
Producing Better Beefsteaks, by Ralph W. Phillips  61
Drugs to Control Parasites, by Benjamin Schwartz  71
Animal Diseases, by L. T. Giltner  81
New Ideas in Feeding, by N. R. Ellis  95
Thyroprotein for Cows, by L. A. Moore and J.F. Sykes  107
Artificial Breeding, by Ralph W. Phillips  113
Hormones in Reproduction, by S. R. Hall and J. F. Sykes  123
Vitamin A for Dairy Cattle, by L. A. Moore, Henry T. Converse, and S. R. Hall  133
More Vitamin A in Milk, by R.E. Hodgson, H. G. Wiseman, and W. A. Turner  143
What to Feed a Cow, by R. E. Hodgson and W. J. Sweetman  149
Advances in Feeding Calves, by Henry T. Converse  159
Breeding Better Cows, by M. H. Fohrman  169
Cross-Breeding Dairy Cows, by M. H. Fohrman  177
The Inside of a Dairy Cow, by W. W. Swett and C. A. Matthews  185
A Cow a Calf Will Be, by W. W. Swett  195
Progress in Hog Production, by John H. Zeller  201
Developments in Sheep, by Damon A. Spencer  209
News About Goats, by Victor L. Simmons  217
Breeding Better Poultry, by Theodore C. Byerly  225
Keeping Poultry Healthy, by Theodore C. Byerly  231
Feeding Poultry, by H. R. Bird  235
Horses and Mules, by William Jackson  239

     Plants
Genetics and Farming, by E. R. Sears  245
Plant Growth Regulators, by John W. Mitchell  256
Short Cuts for the Gardener, by F. C. Bradford  267
Day Length and Flowering, by H. A. Borthwick  273
Flowers as You Like Them, by S. L. Emsweller  284
About Hydroponics, by Neil W. Stuart  289
Finer Strawberries Ahead, by George M. Darrow  293
New Varieties of Blueberry, by George M. Darrow  300
Better Peaches Are Coming, by Leon Havis, J. H. Weinberger, and C. O. Hesse  304
Healthier Tomatoes, by William S. Porte and C. F. Andrus  312
The Story of Hybrid Onions, by H.A. Jones and A. E. Clarke  320
Breeding Healthy Potatoes, by F. J. Stevenson and Robert V. Akeley  
Control of Bean Diseases, by W. J. Zaumeyer  333
Soybeans for the South, by Paul R. Henson  338
Progress With Sugar Sorgo, by E. W. Brandes  344
New Kinds of Sugarcane, by George B. Sartoris  353
Saving Our Sugar Beets, by Eubanks Carsner and F. V. Owen  357
New Kinds of Tobacco, by E. E. Clayton  363
What Makes Cotton Good? by E. E. Berkley and H. D. Barker  369
New Rices; New Practices, by Jenkin W. Jones  373
New Varieties of Wheat, by B. B. Bayles  379
Flax Moves West, by Arthur C. Dillman and L. G. Goar  385
Corn Hybrids for the South, by Merle T. Jenkins  389
Disease-Resistant Oats, by T. R. Stanton  395
Improved Varieties of Barley, by G. A. Wiebe  403
Tailor-Made Sorghums, by John H. Martin  413
Grasses for Hay and Pasture, by M. A. Hein  417
More and Better Clover, by E. A. Hollowell  427
Breeding Better Alfalfa, by H. M. Tysdal  433
New Legumes for the South, by Roland McKee  439
G-Men of Plant Diseases, by Paul R. Miller  443
Spot Anthracnoses, by Anna E. Jenkins  451

     Trees
Better Timber From Farms, by Benson H. Paul  455
Timber—A Modern Crop, by R. R. Reynolds  461
Hybrid Forest Trees, by Palmer Stockwell and F. I. Righter  465
Forests for Old Fields, by John T. Auten  473
Canker Stain of Planetrees, by James M. Walter  481

     Soils
Better Soils, Better Food, by Kenneth C. Beeson  485
Organic Matter in Soils, by A.G. Norman  499
Soil Organisms and Disease, by Selman A. Waksman  511
Ways to Till the Soil, by F. L. Duley and O. R. Mathews  518
Rotations in Conservation, by R. E. Uhland  527
Managing Surface Runoff, by D. B. Krimgold  537
Grass in Farm Waterways, by C. E. Ramser  541
The Control of Salinity, by H. E. Hayward  547
Phosphate Fertilizers, by W. H. Pierre  554
Use of Nitrogen Fertilizers, by F. W. Parker  561
The Liming of Soils, by Emil Truog  566
The Use of Minor Elements, by Matthew Drosdoff  577
Tests of Plants and Soils, by Michael Peech and Hans Platenius  583
Nutrient-Element Balance, by C. B. Shear and H. L. Graner  592
Irrigation in the West, by George D. Clyde  602
Making More of Irrigation, by B. T. Shaw and O.J. Kelley  608

     Insects
The Tax We Pay to Insects, by F. C. Bishopp  613
The Chemistry of DDT, by H. L. Haller and Ruth I. Busbey . . 616
Aerosols for Insects, by Randall Latta and L. D. Goodhue . . . 623
New Insect Repellents, by Bernard V. Travis . . . .628
Pests That Attack Man, by E. F. Knipling  632
DDT in the Home, by L. S. Henderson . . . . . . .643
Crops That Resist Insects, by C. M. Packard, B. B. Bayles and O. S. Aamodt . . . 648
Control of Forage Pests, by W. A. Baker . . . . . . . 651
Insecticides for Cotton, by R. W. Harned . . . . . . . .655
Orchard Insecticides, by B.A. Porter . . . . . . . . .659
Insecticides for Vegetables, by W. H. White . . . . . . . 663
Controlling Pests of Stock, by E. W. Laake and W. G. Bruce . . 670
News About Bee Diseases, by A.P..Sturtevant  674
More Honey From Bees, by C. L. Farrar . . . . . . . . 680
A Bonus From Foulbrood, by E. C. Holst . . . . . . . .686

     New Products
New Uses for Farm Crops, by H. T. Herrick . . . . . . . 689
Penicillin, by Kenneth B. Raper. . 699
Rutin for the Capillaries, by James F. Couch . . . . .711
Dairy Byproducts, by Earle O. Whittier . . . 716
New Goods From Wood, by Alfred J. Stamm and G. H. Chidester . 725
Corncobs Enter Industry, by Elbert C. Lathrop . . . . . . 734
Uses for Vegetable Wastes, by J. J. Willaman and R. K. Eskew . 739
Starch From Wheat, by Cecil T. Langford and Carl E. Rist . . 744
Paper From Flax, by Arthur C. Dillman . . . . . . . . 750

     Food and Clothing
What We Eat, and Why, by Esther F. Phipard . . . . . .753
Protein Is Essential to Life, by D. Breese Jones . . . . . . . 761
Known Nutrients in Milk, by C. A. Cary and A. M. Hartman . . . 770
Unidentified Nutrients, by C.A. Cary and A. M. Hartman . . . 779
Advances in Home Canning, by Edward W. Toepfer and Howard Reynolds . . . . 787
Dried Foods in the Home, by Elsie H. Dawson . . . . . . 795
Freezing Food at Home, by Esther L. Batchelder . . . . . . 801
Clothing That Works, by Clarice L. Scott . . . . . . . . 807
Fabrics Without Mildew, by Margaret S. Furry . . . . . .811

     New Practices
Some New Farm Machines, by R.B.Gray . . . . . . . . 815
Simplifying Farm Work, by E. C. Young and L. S. Hardin . . 817
Machines for Sweetpotatoes, by O.A. Brown . . . . . . . 824
New Fertilizer Machines, by Glenn A. Cumings . . . . . . 827
Cotton Ginning, by Charles A. Bennett . . . . . . . . .832
Air War Against Pests, by H. H. Stage and Frank Irons . . . . 835
Blowers for Insecticides, by W. L. Popham . . . . . . ... 839
Machine-Made Forests, by Paul O. Rudolf . . . . . . . . 843
Equipment for Oil Crops, by I. F. Reed . . . . . . . . 847
New Sugar-Beet Machinery, by S. W. McBirney . . . . . .851
Sugarcane Culture, by George Arceneaux . . . . . . . . 855
Citrus at Its Best, by Paul L. Harding . . . . . 858
Storing Grain in Stall Bins, by E. R. Gross and H. H. Walkden . 863
The Cold Storage of Apples, by W. V. Hukill and Edwin Smith . 867
Shell-Cooled Potato Storage, by Alfred D. Edgar . . .. . . . 871
Pests in Stored Products, by R. T. Cotton. . . . . . . .874
Prefabrication on the Farm, by John A. Scholten . . . . . . 879
Fungi in Forest Products, by Carl Hartley . . . . . . . .883
Advances in Rodent Control, by E. R. Kalmbach . . . . . . 890
Regrassing the Range, by C. Kenneth Pearse . . . . . . . 897
Planning Farm Returns, by Neil W. Johnson and C. P. Barnes . . 905
New Trends in Marketing, by R. W. Hoecker . . . . . . .911

     Conclusions
Farm Science and Citizens, by Sherman E. Johnson . . . . . 920
What Next? by W.V. Lambert   933