CONTENTS 



Department Bulletin No. 1287. — Experiments with Cereals at the 

 Akron (Colo.) Field Station in the 15-Year Period, 1908 to 1922, 

 Inclusive — Continued. 



Experiments With minor crops — Continued. 



Spelt 50 



Proso 50 



Flax 50 



Buckwheat 51 



Grain sorghum 51 



Experiments with corn 52 



Comparison of grain crops i 57 



Choice of crops and types of f amain g recommended 59 



Summary 60 



Department Bulletin No. 1288. — The Control of Tomato Leap- 

 Spot: 



Introduction 1 



Natural methods of overwintering 2 



Possibilities of overwintering on dead weeds, grasses, and remains 



of various crops 2 



Effect of soil on the viability of the fungus 4 



Control measures 5 



Use of early plants 5 



Prevention of overwintering 7 



Destruction of other hosts 9 



Use of clean seed beds 10 



Rotation of crops 11 



Use of manure and fertilizers 12 



Spraying and dusting 12 



Development of resistant varieties 15 



Summary 16 



Literature cited . 18 



Department Bulletin No. 1289. — Common Vetch and Its Varieties: 



Introduction 1 



Area adapted to common vetch 2 



Common names 3 



Description of Vicia sativa 3 



Described botanical varieties or subspecies 3 



Numbers classified 5 



Varietal variation 6 



Description of the varieties 7 



Nonshattering varieties 9 



Winter hardiness 9 



Viability of seed 10 



The relation of tripping to seed setting 12 



Insects visiting flowers of common vetch and its varieties 13 



Seed and straw yield of varieties 14 



R.ate of seeding 14 



Time of seeding 17 



Method of seeding 17 



Depth of seeding 18 



Continuous cropping and rotation with oats compared ._ 18 



Rotations with various crops 19 



Literature cited 20 



Department Bulletin No. 1290. — Transportation of Citrus Fruit 

 from Porto Rico: 



Introduction 1 



Equipment and conditions of the experiments 2 



Citrus-fruit growing in Porto Rico 4 



Taking the fruit on the ship 5 



Stowing the fruit 6 



The first trip 7 



The second trip 12 



The third trip 14 



The fourth trip 15 



Dunnage tests. . 16 



on of results 19 



