40 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Table I.— Selected Constituents in 1 ton of various descriptions 

 of Vegetables in a Fresh Condition. Quantities in pounds. 





Dry sub* 

 stance 



Nitrogen 



Ash 



Potash 



Phosphoric 

 Acid 





lbs. 



lbs. 



lbs. 



lbs. 



lbs. 



Green Cabbage : — 













Head 



224 



6 



21 



10 



4 



Stem .... 



246 



5 



35 



13 



3 



Potatos : — 













Tubers 



515 



8 



21 



13 



4 



Haulms 



1,919 



11 



44 



22 



8 



Carrots : — 













Roots .... 



336 



5 



18 



7 



3 



Leaves 



399 



11 



54 



6 



2 



Peas : — 













Seed and Pods . 



1,919 



80 



52 



23 



19 



Vines .... 



1,881 



23 



97 



22 



8 



Onion Bulbs 



314 



6 



17 



5 



3 



Celery .... 



356 



5 



39 



17 



5 



Asparagus .... 



150 



7 



11 



3 



2 



Lettuce .... 



134 



5 



18 



8 



2 



Thus we see that in one ton, or 2,240 lbs. of green cabbage 

 heads, there is only 224 lbs. of dry substance, G lbs. of nitrogen, 

 and 21 lbs. of ash, the remaining 1,989 lbs. being water. The 

 ash yields 10 lbs. of potash, and 4 lbs. of phosphoric acid. The 

 stem of the cabbage is seen to contain in one ton weight 240 lbs. 

 of dry substance, 5 lbs. of nitrogen, and 35 lbs. of ash. The ash 

 contains 13 lbs. of potash, and 3 lbs. of phosphoric acid. 

 Potatos carry off in each ton of tubers 515 lbs. of dry substance, 

 8 lbs. of nitrogen, 21 lbs. of ash, 13 lbs. of potash, and 4 lbs. of 

 phosphoric acid ; while one ton of potato haulms contains 

 1,919 lbs. of dry substance, 11 lbs. of nitrogen, 44 lbs. of ash, 

 22 lbs. of potash, and 8 lbs. of phosphoric acid. Peas are seen 

 to carry oil* from the soil large quantities of each of the ingre- 

 dients, while asparagus and lettuce are made up very consider- 

 ably of water, and therefore contain in each one ton but a small 

 proportion of nitrogen or of ash constituents. 



The data show, however, that the refuse portion of vege- 

 tables, the stems and haulms, abstract from the soil a very much 

 larger amount of plant-food constituents, weight for weight, than 



