18 THE KOTHAMSTED EXPEKIMENTS. 



4. Wheat — grown continuously. 



5. Eotation of crops — Eoot - crops (Swedish turnips), 



barley, leguminous crops (or fallow), and wheat. 



6. Results of experiments on the feeding of animals — for 



the production of meat, milk, and manure, and for the 

 exercise of force. 



It will be observed that Nos. 1, 2, 3, and 4, refer to the indi- 

 vidual crops grown continuously ; and No. 5 to the same crops 

 grown in rotation. Reference to the list given in Table I. will 

 show, however, that among the field experiments there enumer- 

 ated there will still remain untouched the following : — 



The experiments with oats grown continuously ; 



Those with potatoes grown continuously ; 



Those on the alternation of wheat and fallow ; 



The very extensive series on the mixed herbage of permanent 

 grass-land — including results as to the amounts of produce 

 obtained, and those relating to its composition, both botani- 

 cal and chemical. 



There also remains the extensive series of investigations on 

 rainfall and drainage — their quantity and composition. 



It seemed, indeed, desirable that as complete a view as practi- 

 cable within the space to be occupied should be given of the 

 investigations selected for illustration ; leaving the subjects 

 which it was not possible so to include to be studied, by those 

 who desire so to do, in the various papers relating to them 

 which have been published elsewhere, and to which full refer- 

 ence is given in the lists of papers which will be found in the 

 annually issued ' Memoranda of the Origin, Plan, and Results of 

 the Field, and other Experiments, conducted on the Farm and 

 in the Laboratory,' at Rothamsted. In the same document will 

 also be found, besides much general information in regard to 

 the experiments, descriptive and numerical details relating not 

 only to the experiments which will be treated of in the following 

 pages, but also to those the consideration of which cannot be 

 included in the present Report. 



