300 



The Wohurn Field Experiments, 1912. 



Table I. — Continuous Growing of Wheat, 1912 

 (36^/i Season). 



(Wheat grown year after year on the same land, the manures being applied 



every year.) 

 Stackyard Field— Produce per acre. 



Plot 



1 



2a 



2aa 



2b 



2bb 



3a 

 3b 



4 



5a 



5b 



6 



7 

 8a 



8aa 

 8b 



8bb 

 9a 



9b 



lOa 



10b 

 11a 



lib 



Manures per acre 



Head corn 



Unmanured .... 



Sulphate of ammonia (:=25 lb. 

 ammonia) .... 



As 2a, with 5 cwt. lime, Jan., 

 1905, repeated 1909, 1910and 

 1911 



As 2a, with 2 tons lime, Dec., 

 1897 



As 2b, with 2 tons lime (re- 

 peated), Jan., 1905 



Nitrate of soda(=50 Ib.ammonia) 



Nitrate of soda(^25 Ib.ammonia) 



Mineral manures (superphos- 

 phate, 3 cwt. ; sulphate of 

 potash, ^ cwt.) 



Mineral manures and sulphate 

 of ammonia (=25 lb. ammonia) 



As 5a, with 1 ton lime, Jan., 

 1905 



Mineral manures and nitrate 

 of soda (=:25 lb. ammonia) . 



Unmanured .... 



Mineral manures and (in alter- 

 nate years) sulphate of 

 ammonia (^50 lb. ammonia) 



As 8a, with 10 cwt. lime, Jan., 

 1905 



Mineral manures, sulphate of 

 ammonia (=50 lb. ammonia) 

 omitted (in alternate years). 



As 8b, with 10 cwt. lime, Jan., 

 1905 



Mineral manures and (in alter- 

 nate years) nitrate of soda 

 (=50 lb. ammonia) 



Mineral manures, nitrate of 

 soda (=50 lb. ammonia) 

 omitted (in alternate years) . 



Superphosphate 3 cwt., nitrate 

 of soda (=25 lb. ammonia) . 



Rape dust (=25 lb. ammonia). 



Sulphate of potash 1 cwt., ni- 

 trate of soda (=25 lb. am- 

 monia) ..... 



Farmyard manure (=100 lb. 

 ammonia) .... 



' Applied. 



No. of 

 bush. 



9-1 



16-6 



17-5 



11-2 

 6-4 

 8-0 



7-8 



22-5 



23-9 



8-2 

 7-3 



9-fi' 

 22-3' 



4-8^ 

 20-4^ 



6-6' 



4-82 



13-2 

 16-2 



9-8 

 12-5 



Weight 



per 

 bushel 



Tail 

 corn 



Lb. 

 54-0 



53-7 



54-5 



56-0 

 520 

 52-0 



53-2 



56-7 



56-2 



.520 

 540 



54-0 

 56-0 



520 

 56-7 



52-0 



53-4 



53-7 



57-2 



527 

 54-5 



Lb. 

 29 



92 



160 

 160 

 128 



50 

 64 

 62 



126 



29 



80 

 140 



104 

 76 



118 



150 

 96 



98 

 116 



Straw, 



chaff, 



&c. 



C. q. lb. 

 8 2 7 



4 3 16 



16 2 2 



Value 



per 

 quarter 

 on basis 



of 



34s. 



«. d. 



29 



28 



28 



29 



28 



28 



28 



29 

 32 

 32 



28 



29 



29 



29 



28 



32 



28 



29 



29 



32 



29 



29 



" Omitted. 



