xviii LIST OF ILLUSTRATIONS 



DIAGRAMS IN THE TEXT— conti7iue(l . 



Fig. 4. — Comparison of Nitrate of Soda and Ammonium-salts on 

 Wheat ...... 



„ 5. — Relation between Cost of Production and Returns with 

 varying quantities of Manure 



„ 6. — Production of Wheat with varying Mineral Manures 



„ 7. — Loss of Nitrogen as Nitrates in the Drainage Water, lb 

 per aci'e ...... 



„ 8. — Comfjarative Effects on Wheat of Ammonium-salts applied 

 at different times ..... 



^^ 9. — Effect of Wet or Dry Autumns on continuous Wheat, and 

 Wheat alternated with Fallow 



,, 10. — Yield of Barley during successive 10-year periods (1852 

 1901) 



,, 11. — Yield of Bai'ley (Grain and Straw) with different sources 

 of Nitrogen ..... 



„ 12. — Bai'ley. Total Produce, showing residual effect of Dung and 

 no Manure in relation to the Dung Plot = 100 . 



„ 13. — Effect of Mineral Manures on the yield of Barley (Grain and 

 Straw) ...... 



J. 14. — Mangel Wurzel. Effect of increasing amounts of Nitrogen 



J, 1.5. — Mangel Wurzel. Effect of various Mineral Manures 



,j 16. — Mangel Wurzel. Effect of addition of Mineral Manure to 

 Dung, with various Nitrogenous Cross-dressings . 



„ 21. — Effect of the various Ash constituents with and without 

 Nitrogen on the produce of Hay per acre 



J, 28. — Effect of Nitrogenous Manures on the produce of Hay pe 



acre . . • 



^^ 29. — Progressive Effect of Changes in the Manuring on the Com 



position of the Hay Crop .... 



„ .32. — Percentage of Anthoxanthum odoratum in the Herbage of the 

 Grass Plots ..... 



„ 33. — Percentage of Festuca ovina in the Herbage of the Grass 

 Plots . . 



^^ 34. — Percentage of Alopecimis prafensis in the Herbage of the 

 Grass Plots ..... 



^, 3.5. — Percentage of Arrhenatherum aveiiaceimi in the Herbage of 

 the Grass Plots ..... 



^^ 36. — Percentage of Holms lanatus in the Herbage of the Grass 

 Plots ...... 



