PREFACE 



TN the following pages I have collected information about 

 manures and soil management which will .1 hope prove 

 helpful to farmers in drawing up their schemes for cropping. 

 Conditions are changing so quickly, and labour and transport 

 difficulties react in such complex ways, that no general advice 

 could hold good all round. All farmers ought to increase the 

 produce of their land, and most of them are trying to do so. 

 I have aimed at giving them facts from which they can draw 

 conclusions suited to their own conditions and bearing on their 

 own problems. In agriculture the judgment of the man on the 

 spot has usually to be final, and the more clearly he has the facts 

 before him the sounder the judgment is likely to be. Fortunately 

 the system of County Expert Advisers is in working order, so 

 that no farmer need have any difficulty in getting information on 

 which to base his plan of action. 



E. J. R. 



ROTHAMSTED EXPERIMENTAL STATION, 

 HARPENDEN. 



January 1916. 



365548 



