324 EXPERDIEXT STATION. [Jan. 



Table YI. — Compilation of Analyses of Fhuits 

 AND Gaiiden Chops. 



H. D. HASKINS. 



A. Analyses of fruits. 



B. Analyses of garden crops. 



C. Relative proportions of pliospliorie acid, potassium oxide and 



nitrogen found in fruits and garden crops. 

 The figux'es in A and B are in parts per 1,000. To convert into 

 percentages or pounds in 100, move the decimal point one place to 

 the left. 



Some of the following analyses were taken from the compila- 

 tion of E. Wolif. Those marked with an asterisk (^) were 

 made at the laboratory of the Massachusetts Agricultural Ex- 

 periment Station. 



The tables will be found suggestive when one is jDreparing 

 fertilizer formulas for various fruit and garden crops. One 

 has also to consider, however, in making such fertilizer mix- 

 tures, the influence of cultivation and crop rotation as well as 

 the plant food in the soil. 



Members of the clover family are not dependent wholly upon 

 supplied nitrogen, they having the power, after a vigorous start, 

 to acquire atmospheric nitrogen when plenty of potash phos- 

 phoric acid and lime are supplied. An excess of phosphoric 

 acid may be used in formulas without danger of loss from leach- 

 ing. The same is true, to a certain extent, in case of potash, 

 although this element is more often found in a water-soluble 

 form in soils than is phosphoric acid. The well-kno"\vn system 

 of cro]) fertilization advocated originally by Wagner is based 

 upon the necessity of an abundant supply of potash and phos- 

 phoric acid in the soil, while the nitrogen is added in such lim- 

 ited amounts and at such times as will provide for the maxi- 

 mum growth of the crop and the minimum loss through 

 leaehinc;. 



