INDEX. 43 



Piige. 



Water, factors affecting quantity used 1)}- plants 14-15, IG, 17-19, 26 



irrigation, in the semiarid region ] 7-18 



needs for plant growth in the semiarid region 26 



\\lieat, durum, cultivation in the semiarid region 23, 32, 33 



Kharkof, cultivation in the semiarid region 32 



macaroni. See Wheat, durum. 



spring, cultivation in the semiarid region 31, 32 



Turkey Red, cultivation in the semiarid region 23, 32 



printer, cultivation in the semiarid region 23, 31, 32, 35, 36, 37 



Wind, effect on agriculture in the semiarid region 15-16 



\\'ind breaks, uses in the semiarid region 38 



Wisconsin, moisture conditions relative to j^lant growth 14 



215 



o 



