1921.] 



Additions to the Librae y. 



767 



The following preliminary statement shows the estimated total production of 

 Agricnltnral ^ops in the years 1921 and 1920, with the acreage and 

 Returns, 1921 : estimated average yield per statute acre, in each county of 

 Produce of flops. England in which hops are grown ; and the average yield 

 per acre of the ten years 1911-1920. 



Counties, &c. 



Estimated Total 

 Produce, 



Average returned 

 on 4th June. 



Estimated 

 Average Yield 

 per Acre. 



Arerage 

 of the 

 ten years 



1 Ql 1 9 A 





1921. 



1920. 



1921. 



1920. 



1921. 



1920. 



, East 

 1 Mid 

 Kent < Weald ... 



Cwt. 

 39,000 

 52.000 

 52,000 



Cwt. 

 49.000 

 72.000 



85,000 



Acres. 

 4.005 

 5.414 

 6.634 



Acres. 

 3,258 

 4,520 

 5,710 



Cwt. 

 9-6 

 9-7 

 7-9 



Cwt. 

 15-2 

 15-9 

 14-s 



Cwt. 



11- 5 



12- 2 

 IM 



1 Total Kent 

 HA2fTS 



Surrey 



Sussex 



Hereford 

 Worcester 

 Other Counties* 



143.000 

 9.000 

 1.500 

 13.000 

 33:000 

 24.000 

 760 



206.000 

 10.000 

 2.000 

 26.000 

 23.000 

 14.000 

 120 



16.053 

 1.043 

 196 

 2.269 

 3.522 

 1,963 

 87 



13.488 

 838 

 172 

 1,788 

 2,993 

 1.667 

 56 



8-9 



8- 4 



7- 4 

 5-7 



9- 5 

 121 



8- 7 



15-3 



11- 8 



12- 7 

 14-6 



8-3 

 2-1 



11-6 

 10-1 

 8-3 

 10-4 



7- 7 



8- 2 

 6-3 



Total 



224,000 



281,0u0 



25,133 



21,002 



8-9 



13-4 



10-5 



* Salop, Gloucester, and Berkshire. 



Note. — The estimated total production of 224.000 cwt. this year is 57.000 

 cwt. below that of 1920, when the area was 4,000 acres less, and, excluding 

 the years 1917-19, in which the area was compulsorily reduced to a very low 

 figure, is the lowest recorded since 1909. The total area of 25,133 acres this 

 year includes about 8,000 acres planted after September, 1919, so that nearly 

 a third of the total consisted of young hops not yet in full bearing. The 

 average peld per acre of 8*9 cwt. is 4*5 cwt. less than last year, and 1*6 cwt. 

 below the average of the ten years 1911-20. Good crops were obtained in the 

 western ccmnties, Hereford showing a yield nearly 2 cwt. and Worcester a 

 yield nearly 4 cwt. above the average, but crops were unsatisfactory in the 

 south-eastern counties, notably in the weald of Kent and in Sussex. 



ADDITIONS TO THE LIBRARY. 



Agriculture, General and Miscellaneous. 



Smith, J. W. — Agricultural Meteorology : The Effect of "Weather on Crops. 



(304 pp.) (Hural Text Book Series.) New York : The Macmillan Co., 



1920, 13s. [651.5.0 

 Harris, F. 5.— Soil Alkali : Its Origin, Nature and Treatment. (258 pp.) 



New York : J. Wiley & Sons ; London : Chapman and Hall, 1920, 



13s. 6d. net. [63.11(02); 63.12.] 



Plant Diseases. 



Curtis, K. M. — Life History and Cytology of Synchytrium Endohioticum 

 (Schilh.), Perc, the Cause of Wart Disease in Potato, (pp. 409-478.) 

 Proceedings of the Royal Society, Series B, Vol. 210, B380. London : 

 Harrison & Sons, 1921, 10s. 6d. [63.24.0 



Brierley, W. B. — On a Form of Botrytis cinerea, with Colourless Sclerotia. 

 (pp. 83-114.) Proceedings of the Eoval Society, Series B, yd. 210, 

 B374. London : Harrison & Sons, 1920, 4s. [63.24.0 



