146 Report of the Botanist of the 



the martin experiment. 



This experiment was made by T. E. Martin, West Rush, Monroe 

 Co., N. Y., about 13 miles south of Rochester. Mr. Martin beheves 

 in light applications made frequently. He sprayed 153^ acres 16 

 times and left 2^ acres unsprayed. 



The unsprayed 2]/^ acres yielded 425 bushels or at the rate of 182 

 bushels per acre. An exact acre (18 rows) of sprayed plants on 

 either side of the unsprayed yielded 260 bushels, while the total yield 

 of the isVz acres sprayed was 4293 bushels, which is at the rate of 

 274 bushels per acre. The increase in yield was, therefore, 78 

 bushels per acre or a total of 1222 bushels on 153^ acres. 



The total expense of the spraying was $96.32, the items being as 



follows : — 



700 lbs. copper sulphate, at 5^c $38 50 



6 bu. lime, at 25c i 50 



64 lbs. paris green, at i4^/4c 9 12 



16 days labor for man, at $1.50 24 00 



16 days labor for horse, at $1 16 00 



Wear on sprayer 7 20 



Total $96 32 



Deducting the expense of spraying, $96.32, from the value of the 

 increase in yield," $611, there is left $514.68 net profit on 157^ acres 

 or $32.85 per acre. 



The sprayer used (Plate XIV) was a one-horse, home-made 

 power sprayer made by overhauling an old Peppier sprayer, using 

 the wheels, axle, thills and barrel and adding the following items: 

 Rumsey double acting force pump, $25 ; sprocket wheels and chains, 

 $10; steam gauge, $1 ; relief valve, $1.25 ; six bordeaux nozzles, $3 ; 

 gas pipe, fittings, etc., $10; labor, $10; making a total of $60.25. 



"The bulk of the crop was sold direct from the field at 40 and 45 cents 

 per bushel. In December the price rose to 60 cents per bushel. In order 

 to facilitate comparison the potatoes in the Martin experiment have been 

 valued at 50 cents per bushel as in the other experiments. 



