i36 MAINE AGRICULTURAL EXPERIMENT STATION. I904. 



In case no dry and bulky materials, e. g. cottonseed meal, or 

 tankage, are used in the formula, it will be necessary to use 

 some material such as dry loam, or "muck" as an absorbent and 

 filler. 



WHERE UNMIXED FERTILIZERS CAN BE PURCHASED. 



Unmixed goods can be purchased in Maine from the Sagada- 

 hoc Fertilizer Company, Bowdoinham, The John Watson Com- 

 pany, Houlton, and the agents of the American Agricultural 

 Chemical Co. Tankage can be had from the Portland Render- 

 ing Co., Portland. Out of the State Unmixed goods can be 

 obtained from the fertilizer manufacturers. The following 

 Massachusetts Companies do business in this State : The 

 American Agricultural Chemical Co., 92 State St., Boston, 

 Mass. ; The Bowker Fertilizer Co., 43 Chatham St., Boston, 

 Mass. ; The New England Fertilizer Co., 44 North Market St., 

 Boston, Mass. ; The Parmenter & Polsley Fertilizer Co., Pea- 

 body, Mass. ; The Russia Cement Co., Gloucester, Mass. ; and 

 Swifts Lowell Fertilizer Co., 43 North Market St., Boston, 

 Mass. 



Edmund Mortimer & Co., 13 William St., New York, N. Y., 

 make a specialty of selling chemicals for home mixing. 



PLANT POOD REMOVED BY CROPS. 



It serves as something of a guide in the application of fertili- 

 zers to know the requirements of different crops as measured by 

 the amount of plant food that is removed by a single crop. Of 

 course such figures are only approximate and can not be blindly 

 followed. For instance the legumes, members of the pea and 

 clover family, have the power of acquiring a very considerable 

 part of their nitrogen from the air by the aid of minute organ- 

 isms which form enlargements known as root tubercles upon the 

 roots of this family of plants.* For this reason this class of 

 plants, although among the richest in nitrogen, and removing 

 large amounts of this fertilizing ingredient, can be grown by the 

 use of mineral fertilizers carrying almost no nitrogen. 



The table which follows gives the approximate amounts of 

 nitrogen, phosphoric acid and potash that are removed by quite 

 large yields of the more common farm crops. Not only the 



* For a discussion of this see Report of this Station for 1897. 



