10 



COOPERATIVE SERIES. 



Phos. 

 Nitrog-en acid Potash 

 percent, per percent, 

 cent. 

 Best results on seven New Hampshire farms (husked 



corn) 4.7 9.0 10.7 



Best results on seven New Hampshire farms (fodder) 2.3 9.5 11. 9 



Best results on potatoes 2.3 11.6 7.1 



Best results on sweet corn 2.1 lo.S ii.o 



Best results on ensilage .0 4.0 24.0 



Best results 011 potatoes (2d series) .... 2.8 9.7 12.4 



Average composition of mixtures of chemicals that 



have produced best results 2.4 S.6 14.6 



Average composition of fertilizers sold in the state 3.0 12.0 3.0 



RELATIVE EFFICIENCY OF CHEMICALS AND FARM-YARD 



MANURES. 



Can chemical manures compete with farm-yard manures.'' 

 Will they hold out.'' — These are questions that are asked hun- 

 dreds of times ever}' year b_v careful farmers. 



The experiment begun at Hanover in 1SS5, and reported on 

 at times as the work progressed, is now completed, the full 

 rotation having been accomplished the year before the station 

 was moved from that town. 



Two acres of land, from a field of six acres, were selected 

 for this experiment. The land had produced hay for three 

 years previous, to iSS^J ; oats and sugar-beets had preceded 

 the hay. 



The third acre had 13 loads of manure plowed in and 

 9 loads harrowed in, or in cords this would be 5.6 cords 

 plowed in and 3.8 cords on surface, or 9.4 cords in all, 

 which would sell, as it lay under the stables, for $33. This 

 manure was from fattening steers, well fed with hay, straw, 

 cotton seed, and corn meal. The fourth acre had yearly 

 applications of chemical fertilizers, inixed as follows: 



Dissolved bone-black 346 lbs. 



Muriate of potash 150 " 



Sulphate of ammonia 55 " 



The average cost of this mixture has been $11, and as there 

 have been three applications since 1SS5, it follows that each 

 acre has received $33 worth of fertilizer ; the third having 



