after the middle of January and then only gradually. Injury was less 

 when the soil was limed than when not. 



Effects of Overfeeding with Dried Blood. — In none of the experiments 

 with dried blood did injury appear until about the middle of January. 

 At that time a softness of the petals and irregularity of their arrangement, 

 due to the partial opening of the inner and crinkling of the outer ones, 

 became more or less common. The flowers became susceptible to brown- 

 ing when a drop of water from syringing lodged on a petal in a position 

 to be reached by the rays of the sun. The height of the plants was below 

 normal in the spring but rather above in the fall; the color was good. 

 If the applications of dried blood were not continued after signs of injury 

 became apparent, the plants gradually recovered. The same held true 

 for plants overfed with ammonium sulfate in contrast to those which had 

 been injured by potassium sulfate, sodium phosphate, and sodium chloride. 



Effects of Overfeeding on the Mineral and Nitrogen Content of Plants. 



— Effects upon the dry weight and ash are shown in Table II, the samples 

 being the foliage from the shoots gathered January 9, 19 15. 



Table II. — Dry Weight and Ash in Foliage. 



The increase in both values as the applications of any one fertilizer in a 

 series were increased is shown in the table. The higher values for plants 

 treated with potassium sulfate and sodium chloride over those treated 

 with sodium phosphate correspond to the higher osmotic pressure values 

 obtained from the sap of these plants as well as to the more rapid injury 

 from potassium sulfate. 



Determination of the total nitrogen and mineral content of the ash 

 from various samples of plants treated with potassium sulfate gave the 

 following values : 



* N, P and K in the tables are used to indicate ammonium sulfate, disodium 

 phosphate and potassium sulfate, respectively, while NaCI indicates sodium chloride 

 and A. P., commercial acid phosphate. The figures preceding the letters indicate the 

 number of grams applied weekly per 20 sq. ft. of bench space. 



