CHAPTEE XXIV 

 FARM MANURE "■ 



Of all the by-products of the farm, barnyard mantire is 

 probably the most important, since it affords a means where- 

 by the unused portion of the crop may become a part of 

 the soil. Its use not only makes possible a return to the 

 land of a part of the nutrients previously removed by the 

 crop but also permits an actual gain of carbohydrate ma- 

 terials, the elements of which the plant obtains not from 

 the soil but from air and water. 



This country has already entered an era in which the pre- 

 vention of agricultural waste is becoming necessary and a 

 nearer approach to a self-sustaining system of soil manage- 

 ment more and more essential. For the maintenance of fertil- 

 ity, a careful handling and a wise utilization of all the manure 



^ The following publications will be valuable : 



Ames, J. W., and Gaither, E. W., Barnyard Manure; Ohio Agr. Exp. 

 Sta., Bnl. 246, June 1912. 



Hart, B. B., Getting the Most Profit from Farm Manure; Wis. Agr. 

 Exp. Sta., Bui. 221, June 1912. 



Thome, C. E., Farm Manures; New York, 1914. 



Beavers, J. C, Farm Manures; Purdue Univ. Agr. Exp. Sta., Circ. 49, 

 Mar. 1915. 



Burdick, E. T., Concerning Farm Manures; Vt. Agr. Exp. Sta., Bui. 

 206, June 1917. 



Eippin, E. O., Farm Manure; Cornell Reading Course for the Earm, 

 Lesson 127, Aug. 1917. 



Weaver, E. P., Farm Manure; Pa. State Coll., Ext. Oire. No. 67, Oct. 

 1917. 



Brodie, B. A., Handling Barnyard Manure in Eastern Pennsylvania; 

 U. S. Dept. Agr., Farmers' Bui. 978, July, 1918. 



Wiancko, A. T., and Jones, S. C, The Value of Manure on Indiana 

 Soils; Purdue Univ. Agr. Exp. Sta., Bui. 222, Sept. 1918. 



Duley, E. L., Handlvng of Farm Manure; Mo. Agr. Exp» Sta., Bui. 

 166, Sept. 1919. 



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