Agricultural Chemistry — Turnips. 



503 



for an inquiry into the influence of supply by manuring. The 

 description of seed was Norfolk Whites. The manures and seed 

 were drilled together on ridges, there being 25 inches between 

 the rows. The plots allotted to each experiment comprised six 

 rows, and consisted of about one-third of an acre. The crop was 

 calculated, from weighed quantities taken from measured portions 

 of land, of about one-eighth of an acre for each lot, and extending 

 across the series in three different places. 



Table showing the results of Experiments upon the Growth of Turnips by Manures, 



at ROTHAMPSTED FaRM, HeRTS. 



First Season, 1843. 



Description of Manxibes. 



Average 



1 



Bulb per 

 acre, 

 com- 

 pared 

 with 



No, 2 as 

 1000. 



















Quantities expressed in ^veig^lt per acre. 

 Each lot made up at the rate of 14 



weight 



Number 



Bulb per acre 



, in 



Bulb per acre, if 



of Bulbs 

 in lbs. 



of plants 



tons, cwts. 



» 



4 plant 

 square a 



3 in 

 ard 



a 



bushels per acre, with clay and weed- 



and 



per acre. 



qrs 



, and lbs. 



19,360 in an 



ashes. 



tenths. 











acre. 













Tons. 



CWt3 



qrs. 



lbs. 



Tons, cwts 



qrs 



lbs. 



12 tons farm-yard dung .... 



1 '36 



15,571 



2262 



9 



9 



2 



9 



11 



15 



0 



9 



No manure ...... 



0-52 



17,940 



1000 



4 



3 



3 



2 



4 



9 



2 



6 



6^ cwts. rape cake ..... 



1*08 



17,043 



1967 



8 



4 



3 



12 



9 



6 



2 



21 



O'j' cwts rape cake, 2 bushels veast . . 



1-16 



15,467 



1926 



8 



1 



1 



11 



10 



0 



2 



1 



8 bushels yeast ..... 



1*21 



20,240 



2622 



10 



19 



2 



19 



10 



9 



0 



17 



2^ cwts. superphosphate of lime, 12 lbs. ? 

 sulphate of ammonia, 4 bushels of yeast ) 



1 "33 



19 573 



2796 



11 



14 



0 



22 



11 



9 



3 



17 



56 lbs. sulphate of ammonia . 



1-03 



14,996 



1653 



6 



IS 



1 



25 



8 



18 



0 



5 



2f cwts. superphosphate of lime, 3| cwts. 1 

 rape cake ..... f 



1-69 



16,096 



2894 



12 



2 



1 



21 



14 



12 



0 



14 



li cwts. superphosphate of lime, 5i cwts. \ 



1'52 



15,295 



2490 



10 



8 



2 



5 



13 



2 



2 



17 



























3| cwts. superphosphate of lime, 1 cwt. ") 



1-58 



18,019 



3042 



12 



14 



3 



6 



13 



13 



0 



13 

























' Refuse matter containing much precipi- ") 



1-42 



17,928 



2734 



11 



9 



0 



5 



12 



5 



1 



23 



tated phosphate of lime, rape cake, Sec. j 

























2i c\\xs. superphosphate of lime, 2 cwts. ") 



1-4S 



17,112 



2720 



11 





3 





12 



15 



3 



9 



rape cake, 20 lbs. sulphate of ammonia 5 























cwts. superphosphate of lime, 1 cwt. 7 



1'42 



16,617 



2531 



10 



12 



0 



5 



12 



5 



1 



23 



rape cake, 40 lbs. sulphate of ammonia 5 























1^ cwts. superphosphate of lime, 3|cwts. ") 



1-23 



17,790 



2340 



9 



15 



3 



25 



10 



12 



2 



12 



rape cake, iO lbs. sulphate of ammonia j 

 3f cwts. superphosphate of lime, 2f cwts. i 























1-T5 



15,088 



2841 



11 



17 



3 



18 



15 



2 



2 



0 



rape cake, 20 lbs. sulphate of ammonia y 

























3f cwts. superphosphate of lime, 14- cwts. ^ 



1-39 



19,975 



2974 



12 



9 



0 



15 



12 



0 



1 



2 



phosphate of magnesia-manure . j 

























3i cwts. superphosphate of lime, 150 lbs. 



1-36 



19,228 



2804 



11 



14 



3 



19 



11 



15 



0 



9 



phosphate of potass-manure . r 

























S^cwts. superphosphate of lime, 84 lbs. -i 





19,642 





11 



17 



2 





11 



13 





12 



phosphate of magnesia, 75 lbs. phos- I 



1-35 



2835 



0 



1 



phate of potass .... J 















13 



12 



17 







As 18, with 30 lbs. sulphate of ammonia. 



1-49 



19,113 



3045 



12 



5 



0 



2 



6 



3^ cwts. superphosphate of lime, H cwts. \ 



1-58 



16,916 



2860 



11 



19 



1 



23 



13 



13 



0 



13 



rape cake, 16 lbs. sulphate of ammonia ] 





















Unburnt bones decomposed by sulphuric | 



1-48 



17,675 



2804 



11 



14 



3 



19 



12 



15 



3 



9 



acid, 7 bushels .... j 









14 





10 



4i cwts. superphosphate of lime 



1'47 



18,446 



2908 



12 



3 



2 



S 



12 



0 



Clay and weed-ashes only, 15 bushels 



1-32 



18,745 



2650 



11 



1 



3 



21 



; 11 



1 



8 



0 



20 



Tlie terms superphosphate of lime, phosphate of potass, phosphate of soda, and phosphate of magnesia, 

 Ls found in this table, and others which follow it, are not to be understood as representins the pure chemical 

 substances bearing those names. The composts were formed by acting upon calcined bone-dust by means ' 

 )f sulphuric acid in the first instance ; and in the case of the alkaline salts, and the magnesian one, neutral- 

 sing the compound thus obtained, by means of cheap preparations of the respective bases. 



2 L 2 



