Rex) 
=~] 
New YorK AGRICULTURAL EXPERIMENT STATION. 3 
THE RELATIVE PROPORTIONS OF PLANT-FOOD CONSTITUENTS USED. 
Using one pound of nitrogen as a basis for comparison, the 
relative amounts of other plant-food constituents are readily 
ascertained and these results are given for the different varieties 
of trees in the following table: 
TABLE VII.—RELATIVE PROPORTIONS OF PLANT-Foop CONSTITUTENTS USED. 


. Phosphoric Potash Lime Magnesia 
VARIETY. Nitrogen. acid (P20;). (K 2Q). (CaO). | (MgO). 
Lbs. Lbs. Lbs. Dowie Loe 
EAD DIG comers atelo hee coke axeke S480 0.8045 1 0.27 1.07 1.10 0.45 
BAUS een ers as (erect es A aes hiss ci Ah i} 0.25 0.97 1.53 0.47 
Meat ee ee eto lias po clip els 1 0.24 1.10 1.30 0.37 
WERRREY ee es HE oak co creas tyes 5 Sti 1 0.29 1.29 1.40 0.52 
ULETIAYE RS 9 2 ee RM 1 a a 1 0.33 1.25 1.44 0.42 
PAVOCARG OM Alls. Petacts stovsuie os 1 0.27 1.14 1.35 0.45 

The uniformity of the figures in this table is quite striking. 
It would appear from these data that the relative proportions of 
the different plant-food constituents are approximately the same 
for these different varieties of fruit trees. This means that, 
under like conditions of soil fertility, a mixture of nitrogen, 
phosphoric acid and potash which would meet the requirements 
of one variety would also meet the needs of the other varieties, 
so far as the supply of these plant-food constituents is concerned. 
What particular proportions are best adapted to meet the needs 
of any particular soil can be determined only by special experi- 
ment. 
THE RELATIVE PROPORTIONS OF PLANT-FOOD CONSTITUENTS USED IN 
DIFFERENT PARTS OF TREE AND PRODUCTS. 
Tt is a matter of interest and importance to notice the relative 
proportions of plant-food constituents used separately by the 
fruit, leaves and new wood. 
TABLE VIIJ.—RELATIVE PROPORTIONS OF NITROGEN, ETC., IN DIFFERENT Parts 
oF TREE. 


Variety of fruit : Phosphoric Potash Lime Magnesia 
PART OF TREE} "97°70 Nitrogen. | acid (P2Os). | (K20). | (CaO). | (MgO.). 
————————_—_————__—— | | | 
Lbs. ede seg ipa e Lbs 
ON Wan siete Apple te ..... 1.00 4 : 0.32 
Fruit Te Ponce Peac Et Snes 1.00 0.49 2.05 0.12 0.23 
NED oases Steen ete «> EBaE aes ><: 1.00 0.36 2.24 0.24 0.30 
POPUL ugh doviee ale PIAS eSGioO1. . 1.00 0.35 1.43 0.13 0.18 
pg a ae Quince......... 1.00 0.46 2.00 0.15 0.27 

