Food for Experiments with Fertilizers on Sweet Potatoes. 



Plants 

 Kind of fertilizer and Cost of Bushels per acre. 



quantity per acre. fertilizer. Large. Small. Total. 



1. No manure 157 51 208 



2. 320 lbs. bone-black, 160 lbs. muriate 



of potash $T -"JO 205 36 241 



3. 200 lbs. Nitrate of Soda, 320 lbs. 



bone-black, 160 lbs. muriate of 



potash 12.34 270 58 32S 



4. 20 tons stable manure 30.00 263 61 324 



It will be seen that the addition of Nitrate of Soda to 

 the bone-black and potash gave an increase of 65 bushels 

 per acre, and that the Nitrate, bone-black and potash,, 

 together costing ^12.34, produced a little larger yield than 

 20 tons of manure, costing ^30.00. 



"Another point of considerable importance, since it has reference to the 

 salability of the potatoes, was noticed at the time of digging, viz.: That 

 those grown with chemical manures alone were bright and sinooth of skin, 

 while at least one-third of those grown with barn-yard manure were rough 

 and partially covered with scurf." 



At the Kentucky Experiment Station, experiments were 

 made with fertilizers on Burley Tobacco. The land was 

 ^ , "deficient in natural drainage," so that the 



fertilizers could hardly be expected to have 

 their full effect. Yet, as will be seen by the following table,, 

 the profits from the use of the fertilizers were enormous: 



Experiments on Tobacco at the Kentucky 



Experiment Station. ^, , ^- 



^ Value or 



Yield of tobacco — pounds. tobacco 



Fertilizer per acre. Bright. Red. Lugs. Tips. Trash.Total. per acre. 



1. No manure 



2. 160 lbs. Nitrate of Soda. . . 



3. 160 lbs. sulp. of potash; 160 



lbs. Nitrate of Soda 



4. 320 lbs. superphosphate; 160 



lbs. sulp. of potash; 160 



lbs. Nitrate of Soda 310 810 420 10 360 2000 201.20- 



The tobacco was assorted by an expert and the prices 

 given as follows: Bright and red, fifteen cents per pound;. 



