The Bulletin. 



25 



RESULTS OF PERUVIAN GUANO-NITRATE OF SODA TESTS WITH CORN. 



ResuUs of 190 J/. — At the Iredell farm during this year applica- 

 tions of 50 and 100 pounds of nitrate of soda per acre respectively at 

 planting, each with 150 pounds of acid phosphate and 25 pounds of 

 nmnure salt, were the ones to induce the largest yield of corn in excess 

 of cost of fertilizer. Two hundred pounds of Peruvian guano per 

 acre proved the next best application during this year with a value of 

 $7.06 per acre over cost of guano applied; while the plat receiving an 

 application of 400 pounds of guano per acre only yielded enough com 



Fig. 5— Cotton grown at the Iredell Farm without fertilization and in the same series with the 



Basic Slag and Phosphate Rock Tests. 



taken at 60 cents per bushel to leave $1.22, after paying for the guano, 

 to pay for cultivation, rent, and harvesting, etc., of corn. One hundred 

 pounds of nitrate of soSa divided, half going in at planting and the 

 remaining half used as a side-dressing on June 20, with 150 pounds 

 of acid phosphate and 25 pounds of manure salt, as shown by Plat 

 'No. 5 of Table IX, yielded enough corn to sell for $6.91 per acre 

 after paying for the fertilizing mixture applied. The plat receiving 

 an application of 150 pounds of acid phosphate, 25 pounds of manure 

 salt and 70 pounds of dried blood yielded corn to the value of 

 $5.51 per acre in excess of the cost of its fertilizer application. 



