CO-OFKRATIVB SPRAYING. 151 



can be controlled ten to fifteen per cent. As far as results are con- 

 cerned, the part where we had the heaters we got more apples than 

 from the part where we did not have them; while the part last year that 

 we did not heat gave more apples than the part we heated. Of course, 

 my man's theory is that the lay of the land on the south side of the 

 orchard, that is, the side we did not heat, lies to the north, and the 

 cold wind we had came from the north, and he says that cold wind 

 blowing on that south side had a better chance to blight the blossoms. 

 He thought the higher side we heated lying to the south had a tendency 

 to give us more fruit on that side. All I know is that we had more fruit 

 from the part we heated than from the part we did not heat. 



Secretary: Do you expect to continue the operation next year? 



A. We are building 1,000 more of these heaters. We are building 

 them now for the other side. We will probably make 1,500 more heaters, 

 as we are going to equip the full orchard. 



Chairman: I believe this concludes our program for this afternoon. 

 I am very sorry that just as we are about to close such a fine body of 

 young men came in to hear our discussions and papers. We hope they 

 will come a little earlier tomorrow as we promise them a good program 

 tomorrow. 



Meeting adjourned. 



THURSDAY, JANUARY 19, 1911, 9 A. M. 



Meeting called to order with Mr. Yager presiding. 



Chairman: The first thing on our program is a paper by Professor 

 R. F. Howard, of the University, on the subject of "Co-Operative Spray- 

 ing." 



CO-OPERATIVE SPRAYING. 



PROF. II. F. HOWARD, UNIVERSITY OF NEBRASKA. 



When your Secretary asked me to talk on the subject of "Co-operative 

 Spraying" I suggested to him that certainly the topic was broad enough 

 to permit of one's talking on most anything about sprays and spraying 

 and yet stay within the bounds of his subject. Since it would be out 

 of the question for me with my limited experience to try and tell 

 you men who have been in the business of spraying for years how to 

 spray, I thought I might say something that would be of some interest 

 on the experimental and demonstration work the department of horti- 

 culture has been carrying on for the past five years. We hear the ques- 

 tions asked quite often: "What does it cost to spray apple trees?" or 

 "How much does it pay to spray?" These are reasonable questions for 

 the man who has never sprayed to ask. They are questions, too, that 

 the average man who sprays can answer with difficulty. They are difficult 

 for him to answer because the average grower is not in the habit of 

 figuring the cost of every little item of labor and teams and substracting 

 them from the total receipts. 



One thing I want to do this morning is to answer these questions 



