APPENDIX 331 



Spraying potatoes costs from three and one half to seven dollars an 

 acre. The cost depends upon the number of applications and the 

 amount of foliage to be covered. 



Fruit trees fully grown may be sprayed for from six to twenty cents 

 a season. This includes the cost of labor. 



FERTILIZER FORMULAS FOR CORN, COTTON, AND TOBACCO 



(These formulas were kindly furnished by Director B. W. Kilgore of the North 

 Carolina Experiment Station.) 



Fertilizers for Corn. For average conditions a fertilizer contain- 

 ing 7 per cent available phosphoric acid, i y 2 per cent of potash, and 

 3 per cent of nitrogen is well suited to corn. The following mixtures 

 furnish these materials in approximately the above proportions : 



No. i 



Acid phosphate, 14 per cent phosphoric acid . 875 Ibs. 

 Cotton-seed meal, 6.61 per cent nitrogen . . . 950 Ibs. 

 Kainit, 12^ per cent potash 175 Ibs. 



2000 Ibs. 

 No. 2 



Acid phosphate . . 1000 Ibs. 



Fish scrap, 8% nitrogen 750 Ibs. 



Kainit 250 Ibs. 



2000 Ibs. 

 No. 3 



Acid phosphate 1000 Ibs. 



Fish scrap 920 Ibs. 



Muriate of potash, 50 per cent potash .... 80 Ibs. 



2000 Ibs. 

 No. 4 



Acid phosphate 950 Ibs. 



Cotton-seed meal . . . i ooo Ibs. 



Muriate of potash 50 Ibs. 



2000 Ibs. 



