'fflB SOUrHBRN P Jj A N T K R 



From these few experiment*, which we se- 

 lect from a large numbeT giving similar roeutfci, 

 it will bo seen that even the first year shows » 

 great difference between the manurial require* 

 men to of the wheat and turnips. On wheat, a 

 heavy dressing of superphosphate of iim«* 



,&»&rme, cannot- U denial Mr. Lawes* ex- 

 ^jdasenta prove this idea erroneous. 



f»iebi£, w« l* avs shown, taught that if plants 

 me -tmpplled with a sufficient quantity of their 

 aftA constituents, they will obtain all the am- 

 j!^mf^ tbev need from the atmosphere. Mr.. 



%&wes' experiments show this partly right, [phosphates of magnesia and potash, and sili- 

 mostly wrong. They show that wheat, j ©ate of potash, gave an increase over the ua~ 



a&ish contains * only a comparatively small : manured plot of only three pecks per acre; 

 floaaiitity of nitrogen,. (ammonia,) requires for! while on turnips, the superphosphate of lime 

 2 maximum crop, very much more ammonia WMfd the crop. The 56 lbs. of sulphate of 

 ,.fcs the atmosphere and rain pan supply un- [ammonia per acre, which had such a good effect 

 agfe/the most iWor&ble conditions. On the j on wheat, had little effect on turnips, giving 

 ^ hand, they show that beans, peas, tares, only about half as large a crop as the super- 

 .■mi. turnips, which contain much more nitro- j phosphate of lime. 



than wheat, are enabled to obtain nearly all [ The second 3 ear, the same unmanured wheat 

 £fae aitrogou and ammonia they require, from j plot gave 23 bushels per acre. 

 Ae atmosphere and rain-water. Mr. Lawesj 14 tons farm-yard manure, 32 bushels ; and 

 $$Mfcs it not. improbable that the other cereals j 168 lbs. each of sulphate and muriate of am- 

 <immmovily cultivated require, like wheat, a | monia, 33J bushels. 



vmmh larger quantity of ammonia for their j One plot, which received the previous .year 

 • Maximum growth than they can obtain from j superphosphate -of lime without benefit, wa# 

 &ai&ftnd air: and that, as these generally com- j ^ig y ear left without any manure, and the yield 

 mw4 a nigh price, and farmers wish to -raise was bushels, or half a bushel less than the 

 4faem as frequently as possible, every available j p j ot eontinuou*lv unmatured. 

 mmm should be used to increase the supply of | The Game unmaM&a plot the second year, 

 -^omaonthe ten ^ But us Liebig denies j Qn ^ duced 2 £5 w f bulbs per 

 <J&&t these experiments lead to any sucn con- ! af _ e 1 ' 1 # 

 ^skns let us brk% glance at the principal i ^ ' fiaperl)Li , gphate of H m e s 8| tons. 

 «*in»B obtained. ; j 4 cwt> superphosphate of lime, with 56 Iba. 



T&ree fields, with the general character _ of Lu^fafe e ( nn?;tmia ) 54 tons. 



v&e poil and nrevious treatment as much alike . x , . * , , , x " v - T .t 

 * w " .77 A . . i i? ,1 • I It is remark&ota tnat while on tne unina- 



possible, were set apart tor these expert- j , , , , , , . 



/£. " 1 x, . 1 1 nured wheat plot the - second year, the yield 



Mentis, some 17 years ago. Jb our. crops were « r ^ , , K i» ■ ^4 



24*a*»> waw j o 1 was 23 busnela, the crop on the unmanured 



without any manure, and removed trom 1 . . T . ' , n /- . - , 1U 

 W -\ \ "J - • ' . turnip plot was onlv 2 1-5 tons of bulbs per 



afte fields before the experiments proper com- *•»■•» T -i i < 1? • • • 



u-a» . . * c l , acre; and wmle suwaato of ammonia is again 



Mfeneted. One or more plots hi each nela were , 1 . ? , « . fo 



, X i ^ beneficial on wheat, it has no innuence on 1 



dkrircs left Without any manure, and the e-tners . - , t ' , , * , , . 



" 4UA ? • t ,i • 3 turnips; on the other hand, sunerphosphate 



■■recr-wed a variety of the various organic and ! r £ , . , . , , ' Ul L r ,s L 



, . „ , , r fH % --. 1 of lime which is attended with little or no 



axcTjtvame fertilizing substances. J. he nrsw year, . t . . . - 



l 1 \ r u ' ' 1 increase on wheat, gives a great increase of 



*m the wheat nc.a, I turnips—four times as much as the unmanured 



.'The unmanured plot yielded 16 bu.mels perjpj ot ! $ 



■®*® e - \ The third year the same continuously tin- 



14 Tons farm-yard manure, on a piot aa-| m3DUr , d plofe yielde d 17 j bushels per acre. 



fining, 22 bushels. : On another plot, from which, the previous 



The ashes of 14 tons farm-yard manure, lb ^ a large c f rop wa3 taken by the use of 

 bvshete. : .• . . j ammonia salts, but which was this year left 



Mean of 9 plots, dressed witn art,ncial mme- \ mimaaaredi tLe yicIi] was a Xim J 0YeT m 

 ■vol manures : 16£ bushels. ! bushels 



Mean of 3 plots with artificial mineral ma- ^ k . ^ ide ' ntical witil ^ 

 :imfes,and65 Ibs^of < «^ plot coat muously immanured, and shows con- 



mm, 21 busirels per acre. ] eWelj tliat tlie ammoBia ^ a u assimilated 



With turnips, the first year, the unmanured ^ Doeg it not> aIs0? on tlie other 



plot gave 4 1-5 tons of bulbs per acre. discountenance the popular notion that 



12 Tons farm-yard manure, 9| tons. j ammonia is a stimulant \ acting on the plant 



the animal organism ? 

 phate of ammonia -alone, gave 



56 Pounds sulphate of ammonia, less than las alcohol on the animal organism 9 

 7 tons, • i 224 lbs. sulphate of ammonia -a! 



.43 «wt. superphosphate nf lime. 12 J tons. »2 7 $ bus he te. 



