REPORT OF THE HORTICULTURAL 
DEPARTMENT. 
PART I. PLANT-FOOD CONSTITUENTS USED BY BEAR- 
PNG INT beri hs,” 
L. L. VAn Styxn, O. M. Taytor ann W. H. ANDREWS. 
SUMMARY. 
1. Object. The work described in this bulletin was undertaken 
for the purpose of ascertaining the amounts of nitrogen, phos- 
phoric acid, potash, lime and magnesia used in one growing sea- 
son by bearing fruit trees. 
2. Kinds of trees studied. We selected for the work one to 
three standard varieties of each of the following kinds of fruit 
trees: Apple, peach, pear, plum and quince. The trees were 
typical representatives in the full vigor of bearing. 
3. Plan of work. The fruit, leaves and new growth of wood 
as represented by the tips of branches were carefully gathered, 
weighed, dried and analyzed in the case of each individual tree. 
4. Presentation of results. Tables are given showing the 
amount of each of the plant-food constituents in the different 
portions of each of the trees. The relations of the tabulated 
data presented are discussed in detail. 
5. Plant-food used per acre. Peach trees used the largest 
amounts of plant-food; apple and quince trees, approximately 
alike in the results given, come second, while pear and plum 
trees, which give results much alike, come third. 
6. Relative proportions of plant-food constituents used. 
Using one pound of nitrogen as a basis for comparison, it was 
found that the different fruit trees used very nearly the same 
* A reprint of Bulletin No. 265. 
