Vol. XXVII. PUBLISHED MONTHLY. No. 1. 



S3 

 .J 



k The Journal 



OF THE 



Ministry of Agriculture 



APRIL, 1920. 



PRINCIPAL CONTENTS. 



(For Complete List of Contents see page xv.) PAOB 



The Future of Agricultural Machinery - 1 



The Productiveness of the New Arable - 4 



Cultivation of Land by County Executive Committees - 6 



The Cultivation of a Moor in Cornwall - 9 



Cost of Butter Production ------- n 



Whey and Dairy By-Products ------ 13 



Feeding" Stuffs for May. From the Animal Nutrition Institute, 



Cambridge University - -- -- --31 



Manures for May. From the Bothamsted Experimental Station - 37 



Potash Fertilisers - -- -- -- -40 



Nitrate of Lime : Its Manufacture and Use. G. A. Coivie, 



M.A., B.Sc, A.I.C. 43 



The Composition of Potatoes Immune from Wart 



Disease. E. J. RuJseli, D. Sa, F.K.S. ... . 49 

 A Woman's Impressions of a Danish Small Holding-. 



Bertha M. Bayne. --------52 



French Agricultural Soil Maps. Lt.-Col L. Tebbuu - - 57 



The Establishment of Village Industries. Sir John L. Green 62 

 Preserving Green Fodder : An Inexpensive Trench Silo. 



A. W. Oldershaw, M.H.F., B.Sc. 65 



Air Pollution by Coal Smoke. A. G. Buston, B.A., B.Sc., M.Sc 69 

 Decay in Potato Clamps due to " Black- Leg." S. G. Paine 



and C. M. Haemeler - -- -- --78 



Ideal Homes Exhibition : The Ministry's Model Allotment 81 



LONDON. 



PRINTED UNDER THE AUTE ORITY OF HIS MAJESTY'S 8TATIONFRY OFFICT, 

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