Effects of Overfeeding with Potassium Sulfate. — In earlier stages 

 partial wilting occurred on days of sunshine. Drying up of the tips of the 

 leaves and curling of the leaves upward upon their long axis followed, 

 with often, also, a peculiar inhibition of growth on one edge of the leaf, 

 with the same on the opposite edge of another portion, giving the leaf a 

 wavy outline. 



A marked stunting of growth was observable. This affected most 

 noticeably the lengthening of the stem, resulting in the later shoots assum- 

 ing a rosette appearance, due to the leaves of normal length upon a stem 

 with undeveloped internodes less than an inch in length. (The inter- 

 node in full grown shoots is ordinarily three or four inches long.) The 

 edges of the petals of the flowers after about the middle of January became 

 quite generally withered or crinkled. Those in the center of the flower 

 remained closed quite tightly, while the other two or three rows opened 

 normally. Later, the buds remained closed, although the pistil often 

 pushed its way out and might be seen extending an inch above the top 

 of the bud. 



A marked increase in exudation of nectar in the flower was found to 

 have caused the gluing together of the petals, and so prevented their 

 opening. On cloudy days very frequently a calyx cup would be found 

 completely filled with this exudation. The exudation was most plentiful 

 in the flowers from plants receiving a moderately heavy application of 

 potassium sulfate over a long period of time while the heavier applica- 

 tions caused a noticeable but less plentiful increase. A small amount of 

 nectar is found in normal flowers, and somewhat larger amounts in the 

 flowers from plants receiving large applications of sodium phosphate, 

 sodium chloride, ammonium sulfate, or potassium chloride, but not so 

 generally nor in such large amounts as in the sections treated with potas- 

 sium sulfate. Injury was less marked when ground limestone was added 

 to the soil, in contrast to the effect of liming on the production of injury 

 by ammonium sulfate. 



Effects of Overfeeding with Sodium Phosphate. — When moderately 

 large amounts of sodium phosphate were added over a long period (as in 

 19 13- 1 4) no injury was noticeable until about the middle of March, when 

 a retardation of growth was evident from the decrease in height of the 

 plants and abnormally small buds and flowers. These signs of inhibition 

 became steadily more pronounced until the plants were removed from the 

 benches, about May first. When larger amounts were used (as 12 kg. 

 per 100 sq. ft. in 19 14-15) loss of turgidity in the plants, longitudinal 

 rolling of the leaves, death of the leaf tips and softness of the petals of the 

 blossom were evident. These signs of injury appeared, however, only 



