34 



FIELD CROPS 



No treatment 



2590 Ibs. hay per acre 



Fig. 8. 



640 Ibs. nitrate soda 320 Ibs. nitrate soda 



320 Ibs. acid phosphate 320 Ibs. acid phosphate 



80 Ibs. muriate potash 80 Ibs. muriate potash 



7590 Ibs. hay per acre 7110 Ibs. hay per acre 



Plenty of nitrogen is essential to good hay crops. 



20 tons manure 10 tons manure No treatment 



7420 Ibs. hay per acre 4350 Ibs. hay per acre 2230 Ibs. hay per acre 

 Fig. 9. Grass crops make better use of barnyard manure 

 than does any other crop. 



