31 



(Plat 4 — Nitrate of soda, cotton seed hrdl ashes, castor pomace. 

 I " 5— " " " " cotton seed 



First j ''^^"^* 



, ■ < " 9 — Nitrate of potash, cotton seed hull ashes, cottonseed 



meal. 



" 10 — Nitrate of p)otash, carhonate of potash-magnesia, 



];)hosphatic slag. 



'Plat 6 — Nitrate of soda, high grade sxdiohate of potash, cot- 

 ton seed meal, dissolved hone black. 

 Second " 8 — Nitrate of soda, high grade s^dphate of p)otash, lin- 



class 1 seed meal, dissolved bone black. 



" 7 — Nitrate of soda, high grade sulphate of p)otash, cas 

 \ tor pomace, dissolved bone black. 



r Plat 1 — Nitrate of potash, p)0tash-7nagnesia sulphate, cotton 

 Third j seed meed, dissolved bone black, 



class S " 2 — Nitrate of jyotash^ potash-magnesia sulphate, castor 

 \^ piovKice, dissolved bone black. 



The observations with barnyard manure have not been considered 

 in the above classification ; they are very encouraging yet not suffi- 

 cient in number to advise detailed discussion in this connection. 

 Besides, the amount of barnyard manure used in our experiment, 10 

 tons per acre, contained nearly two hundred pounds of potassium 

 oxide and from thirty to forty pounds of available phosphoric acid 

 less than our formula of commercial fertilizing ingredients called for. 

 An early application of barnyard manure properly supplemented 

 with a suitable potash compound and available phosphoric acid has 

 produced excellent results in other localities. 



Amherst, May 12th, 1897. 



-^i>^ 



