SUMMARY OF RESULTS. 271 



Ground 

 Bone-dust. Guano. rape-cake. 



Ibs. Ibs. IDS. 



Total amount of nitrogen in crops ... 1170 1139 1046 



Total amount of nitrogen in crops ) Q10 Q10 910 



from unmanured plots f 



Increase of nitrogen over the un- ) HQQ 229 136 



manured plots J 



The manure contained nitrogen 207 236 415 



More than in manure 53 less 7 less 279 



The manure poorest in nitrogen (the bone-dust) thus 

 actually gave the highest, and the one richest in nitro- 

 gen (the rape-cake) the lowest, amount of that element 

 in the produce. 



To 100 Ibs. nitrogen in the manure, there was ob- 

 tained of that element in the increased produce 



By bone-dust 125 Ibs. 



" guano 97 " 



" rape-cake 32 " 



The amount of phosphoric acid in the crops was 

 from 



Ground 



Bone-dust Guano. rape-cake. Unmanured. 

 Ibs. Ibs. Ibs. Ibs. 



Phosphoric acid 361 362 338 292 



The manure contained 1102 288 86 



The fields gained 741 



Thefieldslost 74 252 292 



