202 Agricultural Chemistry. 



9.90 and 9.05 per cent of protein in the seed, respectively, while 

 portions of the same seeds grown in South Dakota contained 

 14.24, 13.89 and 12.87 per cent of protein. The same condition 

 obtained with Crimean wheat grown in the other triangle, Kansas 

 uniformly producing the highest protein content in the grain 

 and California the lowest. These results lead to the conclusion 

 that a crop should be improved by selection in the region where 

 it is to be grown, or that "seed should be selected from a region 

 of similar climatic condition. ' ' 



The author just quoted compared eight samples of Durum 

 wheat grown in arid and semi-arid regions with seven samples 

 of the same variety from humid regions. The seed from dry 

 regions contained 17.23 per cent of protein, and that from humid 

 regions, 13.75 per cent ; and the samples weighed 30.3 grams and 

 33.5 grams per 1000 grains, respectively. Abundant water sup- 

 ply is thus productive of plump, starchy grains, while dry con- 

 ditions produce a smaller grain richer in protein. This contrast 

 is illustrated by the change in composition of Durum wheat 

 grown in Mexico. The original seed contained 12.3 per cent pro- 

 tein. Grown under irrigation it produced seed of 11.1 per cent 

 protein, non-irrigated, 17.7 per cent. Shutt has confirmed these 

 data with wheat grown on irrigated and non-irrigated soil at 

 Manitoba, Canada. Lawes and Gilbert had previously observed 

 at Kotharnsted that hot, moderately dry seasons produced the 

 best quality of wheat. 



Sweet corn has been similarly tested by Wiley for several suc- 

 cessive years. The results have shown that the content of sugar 

 is less influenced by temperature than in the case of the sugar 

 beet. The ripening crop was followed along the Atlantic coast 

 from Florida to Maine. Contrary to the results with the sugar 

 beet the higher average content of sugar appeared to be found 

 in the warmer climates. The lower temperatures of the North, 

 however, retard the ripening process and render the corn suc- 

 culent for a longer period than does the warm climate of the 

 extreme South. "Wiley concludes that the amount and distribu- 



