FORTY-FIRST ANNUAL CONVENTION 157 



earth floor, only 54% of the nitrogen fed was finally. recovered 

 to apply on the soil. 



I want to repeat, as the final conclusion of what I have said, 

 that the one point to be kept in mind is the conservation of ma- 

 nure in dairy farming, and with concrete construction and other 

 improvements there will be no such loss as the years gone by 

 have experienced. 



Mr. Sanburn : What do we gain by hauling manure daily 

 to the field? 



Mr. Truitt: I think Dr. Hopkins spoke of that the other 

 day. You gain this — that there is none of this heating that Ov-- 

 curs when the manure is piled. When manure heats, ammonia 

 fumes pass off, containing nitrogen, and that is wliere a good 

 proportion is wasted. When you spread the manure out on ihe 

 field there is only one way to lose, and that is through the leach- 

 ing, and that is not a very appreciable loss, compared io the loss 

 that would result in any other way. 



Mr. Gilkerson : V^^ould you advise hauling manure out 

 when the ground is washing? 



Mr. Truitt : No. 



Mr. Gilkerson : When the ground does not wash, is it 

 advisable? 



Mr. Truitt : Dr. Hopkins said that was the best practice, 

 when you could conveniently do so. 



Mr. Woodburn : Does the nitrogen get lost in the same 

 proportion as the actual weight of the manure, when exposed ? 



Mr. Truitt : No. In the second experiment that the 

 Canadian Experiment Station conducted, the loss of the org.mic 

 matter was two-thirds, but the nitrogen loss was less than one- 

 half. 



