THE MARYLAND AGRICULTURAL Food for 



EXPERIMENT STATION. 



Reprinted from Bulletin No. 67. 



June, 1900. 



The Culture and Handling of Tobacco in Maryland. 



B> H.J. PATTERSON, Director and Chemist. 



Page 140. 



The following materials are well adapted -^ - 



... 1 obacco. 



for use in making fertilizers for tobacco : 



Dissolved South Carolina rock, dissolved bone, dried 

 fish, bone-tankage, cotton-seed meal. Nitrate of Soda, 

 sulphate of ammonia, high-grade sulphate of potash, car- 

 bonate of potash and magnesia, and cottonseed-hull ashes. 

 As a rule, in mixing tertilizers there is not as much Nitro- 

 gen and potash used as would be beneficial and profitable. 

 By the use of crimson clover and cow-peas for adding 

 humus to the soils the amount of Nitrogen or ammonia 

 furnished by commercial fertilizer could be either kept low 

 or reduced. Farmers should generally aim to mix their own 

 fertilizers, as by this means they are sure of what goes into 

 the fertilizer, and, as a rule, they get the plant food cheaper 

 than by purchasing it in ready mixed goods. The mixing of 

 fertilizer can be easily and cheaply done on the barn floor, 

 bv the aid of a hoe, shovel and sand screen. 



The toUowing figures give the approximate per cent- 

 age which each 100 pounds of the various ingredients will 

 represent when thev are added to a mixture and the whole 

 made up to a ton or a,ooo pounds. 



Each 100 pounds of dissolved South Carolina rock 

 represents 7-10 per cent of phosphoric acid in a ton 

 mixture. 



Each 100 pounds of standard dried fish or tankage will 

 represent ^4 per cent of ammonia and 4-10 per cent of total 

 phosphoric acid in a ton mixture. 



Fach 100 pounds of Nitrate of SodaWxW represent about 

 one ( I ) per cent of ammonia when made up in a ton mixture. 



126 



