79 



10. Irrigated Wheat district: 



(a) Present average yield per acre aljout 21 bushels. 

 (6) Chief varieties at present grown: 



Sonora, Little Club, 



Taos, Defiance, 



Felspar, Amethyst, 



(c) Needs of the grower: 



Increase of the gluten content. 



Early maturity. 



11. Wliite Wheat district: 



(a) Present average yield per acre about 141- bushels. 

 {b) Chief varieties at present grown: 



Australian, Foise, 



California Club, Palouse Blue Stem, 



Sonora, Palouse Red Chaff, 



Oregon Red Chaff, White Winter, 



Little Club. 

 (c) Needs of the grower: 



Early maturity. 



Nonshattering varieties. 



Hardy winter varieties in the colder portions. 



12. The cultivated varieties of wheat are naturally divided into eight 

 rather distinct groups, corresponding to eight botanic species, as fol- 

 lows: (1) Common Bread Wheat {Triticumvulgare)^ (2) Club or Square- 

 head {T. compactum)^ (3) Poulard {T. turgidum)^ (4) Durum {T. durwn), 

 (5) Polish Wheat {T. polonimm), (6) Spelt {T. spelta), (7) Emmer {T. 

 dicoecu7it)^ and (8) Einkorn {T. monococcum). The special character- 

 istics of. these groups of wheats that are of prime importance in the 

 work of wheat breeding are her^ given: 



(1) Common Bread Wheat group: 



(«) Excellence of gluten content for bread making. 

 {h) Excellence of certain varieties for cracker making, 

 (c) Yielding power of certain sorts. 

 {d) Rust resistance (in some varieties), 

 (e) Winter hardiness of certain varieties. 

 (/) Resistance to drought of certain varieties. 

 {g) Early maturity (in some varieties) . 



(2) C^lub or Square-head group: 



{a) Great yielding power. 

 {h) Stiffness of straw. 



(c) Freedom from shattering. 



{d) Early maturity (in some varieties). 



(e) Drought resistance (in some varieties). 

 (/) Excellence of certain sorts for making crackers and breakfast foods. 



(3) Poulard group: 



(f/) Excellence of certain varieties for making macaroni. 

 {h) Resistance to orange leaf rust, 

 (c) Resistance to drought. 

 {d) Stiffness of straw. 



