28 The Bulletin. 



It is impossible to draw absolute conclusions as to the require- 

 ments of this type from data thus far obtained. Nevertheless, as 

 in the case of the Toxaway loam, it is safe to say that in the per- 

 manent building up of the type both the phosphoric acid and nitrogen 

 content must be increased. Also, little if any potash need be used if 

 the ground is given thorough tillage, and a rotation used which is 

 adapted to the maintenance of the type. 



COMMERCIAL FERTILIZERS. 



In the Mountain section commercial fertilizers are not as exten- 

 sively used in general farming as they are in the eastern part of the 

 State. The extensive growing of cotton and tobacco has made possi- 

 ble the profitable use of ready-mixed fertilizers in the east. There 

 is not the possibility of profit from this class of goods in grain 

 farming, so we can hardly expect any^vhere near the development of 

 the fertilizer industry in this section as in the east. The abundance 

 of potash in most of the types, and the small amount of profit possible 

 from using commercial nitrogen on grain, practically limit the fer- 

 tilizer constituents to phosphoric acid. 



The plat work on fields "A" and "B" at the Buncombe Farm 

 were planned as mentioned before, to determine the formula which 

 would prove the most profitable for com on the Toxaway and Por- 

 ter's loams. The results on the Toxaway loam (field ''A"), are given 

 in tables 3 and 6, while those on the Porter's loam (field "C"), are 

 in tables 5 and Y. 



The following fertilizing materials were used on these plats : Dried 

 blood for nitrogen, acid phosphate for phosphoric acid, manure salt 

 for potash, and lime from air slaked lime. The normal application 

 of these materials was at the following rate :* 



69.2 lbs. of 13 per cent blood^9 lbs. nitrogen per acre. 



150 lbs. of 14 per cent acid phos.=21 lbs. phos. acid per acre. 



22.5 lbs. of 20 per cent manure salt=4.5 lbs. potash per acre. 



Lime at the rate of 500 lbs, of rock lime or 1,000 lbs. air slaked 

 lime. 



This application exclusive of lime, gives the formula 7-3-11/2- 



The following prices have been used in figuring the cost, and the 

 value of crops: 



14 per cent acid phos., $14.00 per ton. 



13 per cent blood, $60.00 per ton. 



20 per cent manure salt, $20.00 per ton. 



Rock lime, $10.00 per ton. 



Com, 70 cents per bushel. 



Com stover, $8.00 per ton. 



•The normal application was increased on field "A" in 1910 from 300 to 400 pounds [per [acre. This 

 would increase by one-third the amounts of all materials given above. 



