l!() V\n)[) I'oi; Plants. 



})ouiid than in almost any other form, the advantage and 

 economy of purchasing and using this form is very 

 apparent. 



Tn a twenty year test to determine the 

 Proof value of various sources of Nitrogen, 



Positive the New Jersey Experiment Station 



found that crop yields and the per- 

 centage t)f Xitrogen recovered in the crop were greater 

 when Nitrates were used. 



Official figures are — 



' ' If we assign to Nitrate Nitrogen a value of 100, then 

 the relative availability of the four materials stands as 

 follows : 



Nitrate of Sode l']" • 



Ammonium Sulfate 7G . 1 



Dried Blood 62.0 



Manure 52 .4 



This research was published in *' Soil Science," April, 

 1918. 



Nitration as studied by means of the drainage water 

 of 6 plots of land, each 300 square yards in area, during 



4 years, shows that the loss of Nitrogen 

 The Leading in the drainage water was practically 



Question. negligible. Even when Nitrogen was 



appHed in the spring the losses were 

 not large unless heavy rains occurred at the time. 

 The Nitrogen is apparently rapidly taken up by the 

 young growing plants at this season of the year and only 

 a small portion is free to pass into the drainage. The 

 greatest losses occur in the fall, when the soil is bare 

 and heavy rains occur, the Nitrates having accumu- 

 lated in large quantities during the warmer period of the 

 year. Large losses at this season are, however, pre- 

 vented by the growing of cover crops. 



In applying fertilizers it should be 

 How to Apply remembered that any form of phos- 

 Phosphatic phoric acid, such as ac-d ])liosphato. 



Fertilizers. dissolved bone-black or lione meal is 



only partially soluble, and will not cir- 

 culate frcelv in the soil. These fertilizers should, there- 



