FLOWER POT COMPOSITION 



153 



Check pots of botli clay and paper were left untreated. Three days after tliis 

 application the plants in the treated paper pots showed a darker green color 

 and were soon quite superior to the plants in tlie ])aper pots to wiiich no 

 ammonium sulfate had been added. The plants in the clay jiots which re- 

 ceived ammonium sulfate showed a trace of improvement over the untreated 

 pots, but the diiTerence was marked only by darker green foliage. In Table l 

 is shown the height of the plants, thirty days after tlie application of the 

 ammonium sulfate solution. 



Table 4. — Height of tojeato plants ix Foru-ixcii paper and clav floweii 



POTS. THIRTY DAYS AFTER AX APPLICATIOX OF A^IIMOXIUM Sl'LFATE SOLITOX 



On the same daj' that the plants were measured, they were j)hotographed 

 (Figure 2). " 



r^l 



"v^^«^ 



% #1 



■^ttSiih 



iiMifirHrn-Mifiiiiiitni"iiifiiWi 



M 



Fig. 2. — Nitrogen Deficiency in Paper Pots. 



Ammonium sulfate solution applied to pots marked N, two weeks after seedlings 

 were set. Photographed 30 days after nitrogen was applied. 



