16U1.] PUBLIC DOCUMENT— No. 33. 157 



The absence of nitrogen in the manuriul niattt'i- applied 

 to plats 4, 7, 9, is accompanied by the lowest yield in dry 

 matter in the grain ; the yield of dried grain in case of plats 

 4, 7, 9, averages 67.9 per cent., and in case of the remain- 

 ing plats, excluding Plat 8 for stated reasons, it averages 90.8 

 per cent. The plats containing potash-magnesia sulphate as 

 the potash source, namely, plats 2, 5, 10, have yielded the 

 largest amount of grain ; each of these plats received its 

 nitrogen supply in a different form, — ammonium sulphate, 

 blood, and nitrate of soda. The field (A) has been seeded 

 vrith winter rye during the late autumn, to contmue the 

 investigation in the same direction. 



