VOLUMES ONE TO TWENTY-FIVE. 



209 



nitiute used alone or with uiLsed 

 minerals, 479 ; suitability of nitrate for 

 spring di-essings, 480 ; its tendency to 

 develop stem and leaf, ib. ; relative 

 produce of three experimental plots, 

 481 ; rape-cake as a source of nitrogen, 

 {b. ; cereals not benefited by carbon 

 compounds, 482 ; summary statement of 

 results for twelve years, ib. ; increased 

 produce from a given amount of ammonia 



I supplied in manure, 484 ; table of results, 

 4 SO; conditions influencing the pro- 

 ductive efl'ect of ammonia, 485 ; esti- 

 mated increase of corn and straw for 

 each 5 lbs. of ammonia, ib. ; equivalent 

 dressings of sulphate or muriate of 

 ammonia, Peruvian guano, and nitrate 

 of soda, 4S7 ; effect of accumulation, ib. ; 

 conditions affecting the fertilising action 

 of anunonia salts, 488 ; importance of 

 mineral constituents in the soil, 489 ; 

 effects of climate, ib. ; concluding ob- 

 servations, 490 ; growth of -wheat for 

 twenty successive years, and produce 

 per acre without manm-e, ib. ; ditto with 

 farmyard maniure, ib. ; with artificials, 

 ib. ; with mineral manm'es alone, ib. ; 

 nitrogenous manures alone, 491 ; mixed 

 mineral and nitrogenous ditto, ib. ; Lie- 

 big and Professor Anderson on field 

 experiments, ib. ; results of experiments 

 on the growtb of wheat by different 

 manures on different soils, in different 

 localities and in different seasons, 

 493 ; explanation of the talkie, 492 ; 

 practical experience of farmers in 

 the use of artificials, 494 ; the four- 

 course rotation, ib. ; its effects on the 

 soil, ib. ; purchase of food for stock, 495 ; 

 supply of 23hosphoric acid, ib. ; potass 

 manures not profitably applied to wheat, 

 496 ; utilisation of sewage, ib. ; ex- 

 aggerated views of the exhaustion of 

 the soil corrected, 497; the subsoil a 

 source of mineral supply, ib. ; relative 

 deficiency of available nitrogen, ih. ; 

 office of fodder crops, 498 ; Liebig's 

 views on the increase of cereal crojis, 

 ib. ; failure of his wheat manure, ib. ; 

 Professor Hofmann's international re- 

 port criticised, n. 499; nitrogenous 

 manures alone not to be relied upon, 

 500 ; objections to purchasing food for 

 stock answered, ib. ; increased produc- 

 tiveness of the soil, 501 ; tendency to 

 abnormal growth rather than exhaus- 

 tion, ib.; rotation of grain crops, suita-. 

 ble di'essings, and time of application, 

 -ib. 



Wheat, experiments on the growth of, by 

 Professor Vdle (P. H. Frere), xxv. 255 ; 

 his views as to the assimilation of 

 VOLS,, I. — XXV. 



AVHIPPLE-TREES. 



nitrogen by plants, ib. ; his trial fields, 

 256; experiments with different ma- 

 nures, ib. ; M. Barral's criticisms, 257 ; 

 results, ih. ; effect of different consti- 

 tuents of manure on vegetation, 258; 

 the must jjlant, a convenient subject 

 for experiment, ib. 



Wheat, experiments at Eodmersham, 

 Kent, on tlie growth of wheat by diffe- 

 rent manures, for several years in succes- 

 sion on the same land (J. B. Lawes and 

 Dr. J. H. Gilbert), xxiii. 31 ; origin of 

 t'ne exj^eriments, description of soil, 

 and previous management, ib. ; ma- 

 nures, and mode of their application, 

 32 ; the standard of productiveness, ib. ; 

 its accidental vitiation, 33 ; tables of 

 produce and increase, 34-38 ; effect of 

 nitrogenous manures, 39 : produce of 

 difierent plots — 1, unmanured, ib.; 2, 

 mixed mineral manures ; 3, ammonia 

 salts alone ; 4, mixed minerals and 

 ammonia salts, 40 : 5, guano ; 6, rape- 

 cake ; 7, farmyard manure, 41 ; sum- 

 mary of results, 42 ; amount and value 

 of increase from different manm-es, 43 ; 

 table of consecutive dressings, cost of 

 manure, and value of increase, 44; 

 effectiveness of ammonial salts and 

 guano, 43; iiossibility of an extra 

 grain-crop in the course, 44. 



, why not benefited by phosphatic 



manures (Dr. Voelcker), xxiv. 41. 



— , yearly average price of per qr. from 



1G41 to 1856 inclusive, vol. xvii. p. 3. 



• , quarterly average price of, per qr., 



30th June, 1855, to 31st December, 

 1857, xviii. p. xvi. ; 31st December, 

 1856, to 31st December, 1858, xix. p. 

 xvi. ; 31st December, 1850, to 31st De- 

 cember, 1859, xix. ; 30th June, 1S58, to 

 30th June, 1860, xxi. ; 30th Jrmo, 1860, 

 to 30th June, 1861, xxii. ; 30th .June, 

 1861, to .30th June, 1862, xxiii.; 30th 

 June, 1862, to 30th June, 1863, xxiv. 



, diagrams of weekly fluctuations in 



prices in the years 1828 to 1855, xvii. 

 p. 4 ; 1856, xviii. p. viii ; 1857, xix. p. 

 viii; 1858, xx. p. viii; 18.59, xxi. p. 

 viii; 1860, xxii. p. vii; 1861, xxiii. 

 p. viii ; 1862, xxiv. p. viii ; 1863, xxv. 

 p. viii. 



Wheat-straw, see " Straw." 



Whey, tlie scalding of, and the making of 

 whey butter (White), vi. 121. 



, sour, used as flax-steep in Germany 



(J. Wilson), xiv. 199. 



Whinstone rocks, the, the farming of the 

 light soils of (Haxton), xv. 93, 103. 



WiHPPLE-TREES, trusscd. On those shown 

 at the Lewes meeting (in 1852), xiii. 

 328. 



