FARM EXPERIMENTS. 



457 



;md the luvge uiul suuill were separately weiglicd and [dttcd. At this 

 time no diseased tuberai v,ere observed. Ou tbe loth of jMareh they 

 were taken Iroai the pits, the diseased tubers throvru out and the sound 

 ones weighed. The diseased tubers amounted to about oue-tliird of tbe 

 wliole crop, the proportion not varyiny; greatly between the different 

 plots, but being" somewhat greater in the plots which received dung 

 than in those which received artificial manure alone. Tbe table shows 

 the manures applied and the results obtained per acre, given substan- 

 tially in the order of largest yield. The left-hand column indicates 

 the relative locality of each plot : 



The sulphate of ammonia contained 24 per cent, of ammonia ; the 

 dissolved coprolites, 2G per cent, of soluble and 5 percent, of insoluble 

 phosphate 5 and the kainit, or German potash-salts, 24 per cent, of sul- 

 I>hate of potash. 



PEETILIZERS FOR SUGAR-EEET. 



Experiments were made at Eothamsted, England, in 3871, in apply- 

 ing different manures for sugar-beet. The previous croppings were, 

 1843 to 1852, Norfolk white tiirnips and Swede turnips, with different 

 manures ; 1853 to 1855, barley, without manure ; 1850 to 1870, Swede 

 turnips, with manures similar to those used in the following described 

 experiments. The area under experiment consisted of about 8 acres 

 divided into 40 plots, arranged in five series of eight plots each. The 

 manurial applica,tions per acre in series 1 were : Plot 1, 14 tons farm- 

 yard manure. Plot 2, 14 tons rarm-yard manure and 3.^ cwt. super- 

 phosphate of lime. Plot 3 received no manure, and had not been ma- 

 nured for thirty years. Plot 4, 3.] cwt. superphosphate, 300 pounds 

 sulphate of potash, 200 pounds sulphate of soda, and 100 pounds sul- 

 phate of magnesia. Plot 5, 3J cwt. superphosphate. Plot 6, 3^ cwt. 

 superphosphate and 500 pounds sulphate of potash. Plot 7, 3A cwt. 

 superphosphate, 500 pounds sulphate of jjotash, and 3GJ pounds ammo- 

 nia salts. Plot 8, no manure since 1853 f previously, a part immanured 



