$62 Report oF THE HortTicuLruURAL DEPARTMENT OF THE 
free products removed from the tree. The total weight of dry 
matter removed averages 68.28 pounds for each tree. 
(2) Nitrogen.—The average amount of nitrogen taken from 
each tree is about 0.25 pound, of which 62 per ct. is in the leaves, 
30.5 per ct. in the fruit and 7.5 per ct. in the new wood. 
(3) Phosphoric acid.—The products taken from each tree con- 
tain on an average 0.06 pound of phosphoric acid, of which 46 
per ct. is in the fruit, 42 per ct. in the leaves and 12 per ct. in 
the new wood. 
(4) Potash—The average amount of potash removed from 
each tree is 0.27 pound, 61 per ct. of which is in the fruit, 33 per 
ct. in the leaves and 6 per ct. in the new wood. 
(5) Lime.—The products removed from each tree contain an 
average amount of 0.52 pound, of which 5.5 per ct. is in the fruit, 
80.5 per ct. in the leaves and 14 per ct. in the new wood. 
(6) Magnesia.—There is removed in the products taken from 
each tree 0.10 pound of magnesia, 66 per ct. of which is in the 
leaves, 24 per ct. in the fruit and 10 per ct. in the new wood. . 
(7) Relative proportions of constitwents.—Taking the total 
quantities of constituents given in Table III as an average for 
each tree, we have the following approximate relative propor- 
tions of the different constituents, based on 1 pound of nitrogen 
for comparison: 
Pounds 
NEIPB CONIC ONS OF rot pele oe eee eo eee BN iris 3 eo 1.0 
Brospharicvacide Ye ose Fes PR ee 0.25 
bb 9 Kee) MRNA ay: SW er PMA GBA a ac bE wkeop wo pre een wneI NBR Om 1.0 
AIME aise tas o- *f Stat Uw SPST 6 Abbe ns, Sais e's SRO ogee aie ae 1.3 
LAO UGSI E5555 Ais 4 6 Soto ach 00a « aly) aCe be viaccess er 0.5 
(8) Amounts of different constituents used by one pear 
tree.—On the basis of the results presented above, each pear tree 
used on an average the following approximate amounts of plant- 
food constituents during one growing season: 
Pounds 
INELLO DON. CAE a Pan San ae SR ota kena ae Oe 0.25 
Phosphoricadeidss ilage. ates plone. tice’ «Gad Danek SIRES 0.06 
BOTASD oe suce fect} os scnise doch sand akin, davgahpets ests) °c (a «xe th cetiee Rian es 0.27 
JAMO. a ti. 44s vt s sa ee + km ep egies atts Rete ‘a teheseiatls aur 0.32 
MA SNCSI Hse! 0)sie55 nie a wae 'aare’ a insoca te Uae Paces ey tah tee ee 0.10 
