Food for Nitrate of Soda is readily soluble in water and is directly 



available to plants; while the Sulphate of Ammonia, 



x 3 6 though quite soluble, has to be changed into Nitrate be- 

 fore it can be used by crops. Hence the action of these 

 two materials is not the same on different soils and un- 

 der varying weather conditions. The sulphate has been 

 preferred by some because it would act slower; yet if 

 conditions for nitration were unfavorable, it might not 

 be available to the crop when needed. Again, under 

 some circumstances, Sulphate of Ammonia has been 

 found to be actually harmful* to plants. 



SOUTH CAROLINA AGRICULTURAL 

 EXPERIMENT STATION. 



From Bulletin No. 56, p. 5. 



Wheat. 



/. Comparison of Varieties. IV. Home Manures. 



II. Quantity of Seed per Acre. V. Commercial Fertilizers. 



III. Experiment with Nitrogen. VI. Tillage. 



If wheat is sown upon land deficient 

 er 1 lzers. « n or g an j c matter, it is wise to use a 



complete fertilizer, containing Nitrogen, phosphoric acid 

 and potash. 



If wheat shows an unhealthy appearance in early 

 spring, especially upon sandy lands, an application of 

 seventy -five pounds of Nitrate of Soda will prove bene- 

 ficial provided there is enough phosphoric acid in the 

 soil to co-operate with it and make the grain. 



Experiment with Nitrogen. 



To compare effects of Nitrogen from 

 ob J ect cotton-seed meal and Nitrate of Soda 



and the latter applied with the seed and as a top- 

 dressing. 



The intention was to use on each plot a constant 

 quantity of phosphoric acid and potash as the equiv- 



* On account of its leaving a strong mineral acid residue in the soil, after 

 its Nitrogen has been nitrated by the soil. 



