146 Report or tuk BorTanist OF THB 
GAINS AND LOSSES. 
Rows Rows Rows Rows Rows Rows Row 
land2. 3and4. 5and6. 7and8. 9 and 10. lland 12. 13 ane 14. Total. 

Lbs. Lbs. Lbs. Lbs. Lbs, Lbs. Lbs. Lbs. 
Sprayed 2%...» 22.0 11,6. 20.5 511.2" “18,95 $22 ee 
Unsprayed ..... 26.5 22.1 31.6 §21.4 34.1" 25.0" “18th Ais 
TOLL PRIN, 5 wise 48.5 33.7 52.1 32.6 48.0 — 87.2 Sie. ageeee 





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The first section of Table III shows the yield in pounds of each 
sprayed row, also the total yield of all the sprayed rows before 
and after spraying, together with the differences of the yields for 
two years. This table shows a gain from spraying on every row, 
and a total gain on two-fifths acre of 110.7 lbs., an average gain 
f 276.7 lbs. per acre. 
The second section shows the yield of each unsprayed row, also 
total yield, in pounds, of unsprayed rows for two years, together 
with the differences in yield. In every case these unsprayed rows 
show a decreased yield the second year, a total decrease exceed- 
ing the total increase of the sprayed rows in a ratio of approxi- 
mately 38 to 2, 
This method of showing the increased yield from the sprayed 
row, and the decreased yield from the unsprayed row, does not 
show the whole advantage of the treatment, at least in the way 
generally followed. The sum of the increase and decrease as 
shown in the third section of Table III, comes nearer the method 
usually adopted. 
By this method the total increase as a result of spraying two- 
fifths acre will be 289.5 lbs., or at the rate of 723.75 lbs. increase 
per acre. 
The method usually followed to show the advantages or dis- 
advantages of any method of treatment is to compare the yield 
of the treated with that of the untreated for one season, as shown 
in Table IV. 
TABLE IV.—COMPARISON OF SPRAYED AND ADJACENT UNSPRAYED Rows, 
1900. 
Total 
Pounds. Pounds. Pounds. Pounds. Pounds. Pounds. Pounds. pounds 
Sprayed rows... 115.4 127.0 137.3 125.6 120.8 115.0 184.4 875:5 
Dnsprayed rows... 77.9 92.1 79.0 95.1 ° 75.3” 83.8 8S O92Z:0. 








AS OID) ieee os = ie 37.5 34.9 58.3 30.5 45.5 29.2 47.1: 28550 
—__ EO Oe SS - 
Percentages ... 48.0 37.8 174.0 “82.0 -60.5 34.0 54.0 47.8 
Sr —-O ——S-O——-)S  _ 









