12 HATCH EXPERIMENT STATION. [Jan. 



2. There is much evidence that the fertilizer for one acre 

 should furnish at least 80 to 100 pounds of actual potash. 



3. A corn fertilizer containing* 5 per cent, of potash, 

 applied at the rate of 1,000 pounds per acre, furnishes 50 

 pounds of actual potash. With such a fertilizer it will pay 

 to use from 75 to 100 pounds of muriate of potash per acre. 



4. Four cords of average farm-yard manure will supply 

 about 96 pounds of actual potash ; but not all of this will be 

 available the first year, hence it will in most cases be found 

 profitable to use with this manure 75 to 100 pounds of muri- 

 ate of potash for corn. 



Bye. 



This crop is most largely increased by muriate of potash 

 and nitrate of soda, but responds much less freely to an ap- 

 plication of fertilizers than corn. 



White Mustard. 



1. In this we have a crop responding most freely to an 

 application of phosphates, indicating that the percentage of 

 phosphoric acid in fertilizers for turnips and cabbages (mem- 

 bers of the same family) should be large. 



2. White mustard sown yearly in standing corn in the 

 later part of July grows until late in the fall, thus prevent- 

 ing soluble nitrogen compounds from being washed out of 

 the soil. It does not injure the growth of the corn the year 

 it is sown, and the ultimate effect is to make the soil produce 

 larger crops in subsequent years. 



Potatoes. 



1. Both being used in connection with materials furnish- 

 ing equal amounts of nitrogen and phosphates, sulphate of 

 potash gives larger yields of potatoes than muriate of potash. 



2. Used in the same way, sulphate of potash produces 

 potatoes of better quality than muriate of potash. 



3. Potato fertilizers should therefore contain potash in 

 the form of sulphate rather than muriate. 



4. A large share of a fertilizer for potatoes should be 

 placed in the drill. This gives larger crops of better quality 

 than spreading broadcast. 



