CONTENTS 



XV 



CHArrKH IX 

 Experiments ii'on (Juass Land Mown von Hay eveio Ykah 



I. The Unnianurt'd Plots .... 

 II. L'se of Nitrogeimus Maniu-fs alone 



III. Mineral Manures used alone 



IV. Complete Manures — Nitrogen and AMinerals 

 \ . The Action of Organic Matter 



VI. Effects of Lime ..... 



\TI. Changes in Herbage following Changes in Manuring 



MIL The Effect of Season .... 



Practical Conclusions .... 



References ..... 



mi 



157 

 15S 

 160 

 165 



107 

 IGS 

 ls;i 

 1^5 

 KH9 



CHAPTER X 



Experiments upon Chops (.rown in Rotation, Aodei.i, Fiei. 



I. The Unmanured Plots ..... 



II. Effect of the Manures ..... 



III. The Effect of the (irowth of Clover or Beans on the succeedin^ 



Crops ....... 



IV. Effect of Manorial Residues on subsequent Crops . 

 y. Gain or Loss of Manurial Constituents to the Land 



Practical Conclusions ..... 



References ....... 



192 

 19.-. 



2(M) 



204 

 2<il) 

 211 

 2 If, 



Nitrification and 



CHAPTER XI 



ME Composition ok Draina(;k U'atk.r.- 



I. The Process of Nitrification 

 II. Denitrification 

 III. Nitrates in Cultivated Soils 

 I\'. Nitrates in Manured and Cropped Soils 



\'. The Nitrates in Drainage Waters . 

 \T. Other Constituents of Drainage Waters 

 References .... 



217 

 2 1 !> 

 221 

 22.1 

 229 

 2 .{7 

 239 



