Contents 



Experimental Station Staff 

 Books published from Rothamsted 

 General Account of Rothamsted 



Report of Work done 1918-20 



Expenditure on Crops 

 Stubble Cleanint; 

 Efficiency of Labour 

 Value of Tractor 

 Cultivation Experiments 

 Fertiliser Investigations ... 

 Organic Matter in Soil ... 

 Soil Population 

 Weed Flora 

 Physical Conditions 

 Entomological Investigations 

 Mycological Investigations 

 War Work at Rothamsted 



Summary of Papers published : 



I. — Scientific Papers 



Crops and Plan r Gkovvtii : 



Botanical Department... 



Statistical Department 



Chemical Department — Rain 



Soil Changes 

 Soil Organisms : 



Protozoological Department ... 



l^acteriological Department ... 



Chemical Department 



Environmental Factors : 

 Physical Department ... 



Plant Pathology : 



Entomological Department ... 

 Mycological Department 



II. Technical Papers 



Botanical Department... 

 Experimental Plots and Pots 

 Artificial Farmyard Manure ... 

 Partial Sterilisation 

 General Agricultural Problems 



Recent Books by the Rothamsted Stafi 

 Crop Results — 



Notes on Seasons 

 Tables of Results 



Page 

 4, 5 



6 



7,8 



8 

 9 

 11 

 12 

 13 

 14 

 15 

 17 

 19 

 21 

 21 

 23 

 24 

 25 



28 



Trustees and Members of Council 



36 



