Contents. ix 



SUMMARY OF THE RESULTS OP TWENTY 

 YEARS' EXPERIMENTS ON THE CONTINUOUS 



GROWTH OF BARLEY UPON THE SAME LAND 117 



VII. EXPERIMENTS ON THE CONTINUOUS G-ROWTH OF 

 BARLEY UPOM THE SAME LAND FOR THIRTY- 

 TWO YEARS 122 



CHARACTERISTICS OF THE BEST AND WORST 



SEASONS OF THE THIRTY-TWO YEARS ... 126 



VARIATIONS IN THE CHEMICAL COMPOSITION 



OF THE BARLEY CROP 128 



THE HOME PRODUCE AND THE IMPORTS OF 



BARLEY 130 



CULTIVATION OF WHEAT AND OF BARLEY 



COMPARED 132 



GRASS. 



VIII. AGRICULTURAL RESULTS OF EXPERIMENTS ON 

 THE MIXED HERBAGE OF PERMANENT 



MEADOW 133 



PLAN OF THE CONTINUOUS EXPERIMENTS ON 



MEADOW HERBAGE 138 



RESULTS OBTAINED UPON THE VARIOUSLY 



MANURED PLOTS OF MEADOW LAND ... 143 



1. Without manure : Plots 3 and 12 ... 144 



2. Ammonia-salts alone : Plot 5 145 



3. Nitrate of soda alone : Plots 15 and 17 146 



4. Mixed mineral manure alone : Plot 7 149 



5. Superphosphate of lime alone: Plot 



4-1 153 



6. Mixed mineral manure, with and with- 



out potash : Plots 7 and 8 155 



Effect of mixtures of nitrogenous and 

 mineral manures ... l' r >8 



6 



