1140 



Notes on Manures for March. 



[Mar., 



Bibliography. 



1. (Anon) The Little Owl : A Danger to Poultry and Game. 



Ihe Times, 1919 (Aug. 28th), p. £ 



2. Bryden, H. A The Little Owl: Country Life, 1912 (July 6th), 



pp. 25. 26. 



3. Clarke. E. T The Little Owl: The Gamekeeper, 1920 (March), 



p. 151. 



L Collinge, Walter E. ... On the Value of the different Methods of Estimating 



the Stomach Contents of Wild Birds. Scottish 

 Nat., 1918, pp. 103-108, ffgs. 1 k 2. 



5 The Little Owl : The Times. 1919 (Aug. 21st), p. 6. 



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(Oct. 29th). p. 558. 



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 Soc, 1912, Vol. 56, pp. 1-11. 



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9. Frohawk, F. W. ... The Little Owl m Essex : The Field, 1919 



(Not. 19th), p. 617. 



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Birds, 1920, vol. xiii, pp. 250-268. 



11. McAtee, W. L Methods of Estimating the Contents of Birds' 



Stomachs. Auh, 1912, vol. xxix, pp. 449— 161. 



12. Meade-Waldo, E. G. B. The Food of the Little Owl: Brit. Birds, 1912. 



vol. vi, pp. 61. 64. 



13 The Little Owl : Ue Field, 1919 (Dec. 20ih), 



p. 815. 



14. Waierton, Charles ... Essays on Natural History, chiefly Ornithology. 



Second Series. London, 1884. 



15. Witherby, H. F., and The Spread of the Little Owl from the Chief Centre* 



Ticehurst. N. F. of its Intro iucrion. Brit. Birds. 1907-8, 



vol. i.. pp. 335-342. 



****** 



NOTES ON MANURES FOR MARCH. 



E. J. Russell, D.Sc, F.E.S., 

 Rothamsted Experimental Station. 



Manure for the Swede Crop. — Few crops have been so much 

 discussed as the swede crop : on many farms it involves the 

 expenditure of more money per acre than any other, and at 

 the same time it is so useful as to justify attempts to secure 

 as large a yield as possible. On good farms the management 

 of the crop is as a rule so satisfactory that the yield is about 

 as high as the season will allow : in other words, the limit is 

 set by the weather rather than by the farmer's efforts. Indeed, 

 in some parts of the country farmers put on more fertiliser to 

 the swedes than the yields justify, thus not only bringing 

 disappointment on themselves but losing the benefit which 



