510 



Agricultural Chemistry-— Turnips, 



Table showing the results of Experiments on the Growth of Turnips by Manures, at 

 Rothamsted Farm, Herts. 



Second Season, 1844. 



Descbiption or Manures. 



Quantities expressed in weight per acre. 

 Each lot made up at the rate of 

 14 bushels per acre, with clay and weed- 

 ashes. 



12 tons farm-yard dung 



Unmanured ..... 



7 cwts. rape-cake 



4 cwts. superphosphate of lime, -J cwt. ") 



phosphate of ammonia . . .3 

 4 cwts. superphosphate of lime, i cwt. i 



sulphate of ammonia. . . .3 

 3 cwts. superphosphate of lime, 15 lbs. ) 



phosphate of ammonia . . .3 

 3 cwts. ground apatite .... 



3 cwts. of apatite, decomposed by sul- \ 

 pliuric acid, containing 200 lbs. apatite j 



As No. 8, with 56 lbs. hydrochloric acid i 

 added (sp. gr. 1125) . . . .3 



4 cwts. superphosphate of lime, 4 cwts. ) 

 rape-cake . . . . . .3 



4 cwts. superphosphate of lime, 4 cwts. 

 rape-cake, 15 lbs. phosphate of am- 

 monia 



5 cwts. superphosphate of lime, land 7 

 dug 6 inches deep . . . .3 



4 cwts. superphosphate of lime, 4 cwts. 7 

 rape-cake, 2 cwts. common salt . . 3 



5 cwts. superphosphate of lime, land') 

 trenched with the spade 18 in. deep . 3 



1 cwt. superphosphate of lime, 4 cwts. \ 

 phospliate of soda . » . .3 



1 cwt. superpliosphate of lime, 4 cwts. \ 

 phosphate of magnesia . , .3 



1 cwt. superphospliate of lime, 4 cwts. } 

 phosphate of potass . . . .3 



2 cwts. superphosphate of lime, 1 cwt. 

 each of phosphate of potass, soda, and 

 magnesia ...... 



Same as No. 18, with 15 lbs. phosphate 

 of ammonia . . . . . ( 



2 cwts. superphosphate of lime, 4 cwts. ^ 

 rape-cake, 56 lbs. sulphate of ammonia j 



374 lbs. apatite, decomposed by sul- "j 

 phuric aci I, containing 104 lbs. sul- I 

 phuric acid, 270 lbs. apatite . . J 



5 cwts. superphosphate of lime 



2 cwts. superphosphate of lime, 56 lbs. 1 

 sulphate of ammonia, 1^ cwts. nitrate > 

 of soda . . . . . . j 



Average 

 weiglit 

 of Bulbs 



in lbs. 

 and 



tenths. 



1-19 

 0-36 

 0-27 



0-92 



0-87 



0*65 

 0-38 

 0-71 



0- 80 



ri8 



1- 29 



0-97 

 0'30 

 0'99 

 0'76 

 0'70 

 0-66 



0-68 



0-73 

 0-78 



0-85 

 0*81 

 0-83 



Number 

 of plants 

 per acre 



20,096 

 13,736 

 5,488 



16,768 



14,256 



21,632 

 17,864 

 21,232 



20,392 



13,256 



10,320 



20,152 

 7,952 

 13,360 

 19,504 

 21,336 

 20,552 



18,624 



20,352 

 6,832 



18,728 

 21,205 

 10,072 



Bulb per 

 acre, 

 com- 

 pared 

 with 

 No. 2 as 

 1000. 



4875 

 1000 

 294 

 3138 



2498 



2867 

 1382 

 3076 



3320 



3173 



2697 



3968 



2683 

 3013 

 3024 

 2775 



2572 



3107 

 1084 



3247 

 3503 

 1700 



Bulb per acre, in 

 tons, cwts., 

 qrs., and lbs. 



Tons cwts qrs. lbs. 

 10 15 



2 4 

 0 13 



Bulb per acre, it 

 4 plants in a 

 square yard = 

 19,360"in an 

 acre. 



On reference to the summary as already given of the climatic 

 conditions of the turnip seasons of 1843 and 1844, it will be seen, 

 that in the latter half of the month of July, the low degree of 

 temperature, the number of rainy days, and the actual amount of 

 rain, are all most favourable to the early stages of the plant in 

 1843. Throughout the months of August, September, and Octo- 

 ber, on the other hand, the conditions of turnip g-rowth, so far as 

 season is concerned, are more favourable in 1844 than in 1843. 



