FIELD CROPS 



545 



Aii experiment was conducted to observe the effect of nitrate of soda 

 applied during the growing season. The same quantities of cotton- 

 hull ashes and of nitrogen were applied for 5 years. Plat H received 

 all its nitrogen (210 lbs. per acre) in the form of castor pomace, while 

 plats I and J received only 105 lbs. in the same form and the rest in 

 the form of nitrate of soda — plat J in one application and plat I in 2 

 applications. The results are given in the following table: 



Effect of nitrate of soda added during the growing season. 



" The average yield of tobacco, as well as the yield of wrapper leaves, was decidedly 

 larger on plat J. which rereived part of its nitrogen in a single application of nitrate 

 of soda after the crop was marly half grown, than on either of the other plats; the 

 individual leaves were no heavier, nor was there any perceptible difference in lire- 

 holding capacity. The quality of the wrapper leaf must determine whether the 

 practice is a profitable one. The indications are that the quality of the crops, 

 where nitrate of soda was applied after the plants were partly grown, was inferior 

 to that of plat 11, to which no nitrate was added." 



The comparison of linseed meal with cotton-seed meal and castor 

 pomace was carried on for only 4 years. The following table shows the 

 results : 



Comparison of linseed meal with cottonseed meal and castor pomace. 



Two plats were dressed annually for 4 years with equal quantities of 

 bone and double sulphate of potash and magnesia. In addition each 

 plat received annually 105 lbs. of nitrogen per acre, one in the form of 



