26 The Bulletin. 



Results of 1905. — During this year at the Iredell farm, the only 

 farm at which these tests were conducted, plats to which 100 pounds 

 of nitrate of soda per acre were added respectively each with 150 

 pounds of acid phosphate and 25 pounds of manure salt were the 

 ones producing the gTcatest values of corn in excess of the cost of 

 fertilizer added. On one plat all the nitrate of soda went into the 

 soil at planting with the other materials, while the other had 50 

 pounds of it to go in at planting and the remaining 50 pounds to be 

 added as a side-dressing on June 27. 



An application of 125 pounds of acid phosphate and 135 pounds 

 of cotton-seed meal yielded corn enough per acre to pay for the fer- 

 tilizer at market price of the materials and have $13.50 worth of 

 corn, taking corn at 60 cents per bushel. 



Results of 1906. — At the Iredell farm the most favorable applica- 

 tion was one consisting of 150 pounds of acid phosphate, 25 pounds 

 of manure salt and 100 pounds of nitrate of soda per acre, the nitrate 

 being divided and 25 pounds going in just before planting, with the 

 other materials, and the remaining 75 pounds being used as a side- 

 dressing and applied on June 16. During this year at this farm, 

 the use of 200 pounds of Peruvian guano per acre was the second 

 most favorable application with a value of $11.08 in excess of the cost 

 of the guano ; while 400 pounds of Peruvian guano applied per acre 

 only gave $9.32 as the selling price of the com in excess of that 

 required to pay for the guano. This latter application only produced 

 eight cents more profit than the plat to which no fertilizer was ap- 

 plied. In fact only eight cents for the trouble and expense of apply- 

 ing the Peruvian guano.- However, it must be remembered that as 

 Peruvian giiano only acts with moderate rapidity its residual action 

 on subsequent crops should be considered in drawing final conclusions. 

 The guano has a high percentage of total phosphoric acid, the residue 

 of winch should prove very beneficial in subsequent years to crops 

 grown on the land to which it has been applied in libefal quantities. 



An application of 150 pounds of acid phosphate, 25 pounds of 

 manure salt and 50 pounds nitrate of soda per acre, applied just be- 

 fore planting, produced corn to the value of $10.65, after deducting 

 the cost of the fertilizing mixture. 



At the Edgecombe farm during this year, probably due to exces- 

 sive rains, that fell during the growing season, all applications of 

 fertilizers proved disappointing in their results in ])romoting in- 

 creased yields, as very little efi"oct resulted from any of the applica- 

 tions used, as is seen by comparing the yields of the unfertilized plat 

 (No. 4) with the others, results of which are contained in Table XII. 

 The largest yield and the greatest value of corn produced over cost 

 of fertilizer was from an application of 150 pounds of acid phosphate, 

 25 pounds of manure salt and 100 pounds of nitrate of soda per 

 acre, applied just before planting the corn. The land at this farm 



