1913 ] Shaiv : Studies on Influences Affecting Protein Content of Wheat 125 



There is shown a slightly increased protein content on the 

 potash plats over the corresponding checks. Three out of the 

 five cases show a higher protein content on the potash plats than 

 on the checks, and one shows the same percentage on both plats. 

 The difference is so small in the average that it might easily 

 be due to difference in the moisture content of the soil, but data 

 along this line as relating to these plats are not at hand, and 

 therefore it would be unwise to attempt to draw conclusions 

 until such data are secured. 



THE EFFECT OF GEEEN MANUKE CEOPS 



Plats 23, 24, and 25 have had legumes grown upon them 

 every third year and cereal crops the other"' year of the rotative 

 period, with superphosphates and potash added the second year 

 after the legume. Comparing the result from these plats for 

 the short period the trials have been under way with the average 

 of the check plats, and with the average of those on either side, 

 the following results appear : 



Per cent 

 protein 

 Plats with legumes 11.06 



Average of all checks, no legume 11.02 



Average of two nearest checks, no legume — . 10.90 



It is not apparent that any material change in protein content 

 has been effected by the treatment employed. 



GENERAL CONCLUSIONS 



The results presented in the foregoing pages seem to warrant 

 the following conclusions: 



First — There are important seasonal, varietal, and individual 

 variations in wheat plants with respect to protein content. 



Second — The principal factor causing the most pronounced 

 variation in the protein content of wheats is climate, particu- 

 larly the moisture supply in the later growing period of the crop. 



Third — The tendency of wheat kernels to change from a 

 glutenous to a starchy condition is not a constant one, but is 

 mainly dependent upon the individuality of the plant and upon 

 seasonal influences, particularly moisture supply in the latter 

 part of the growing period of the plants. 



