Plate 1 
A. —Growth of beans on a Norfolk sandy loam soil, receiving heavy applications 
of various nitrogen fertilizers. Acid phosphate and potassium sulphate 
were added to each pot, except the one containing cyanamid, to which 
calcined phosphate and potassium sulphate were added. 
No. 1—No nitrogen; No. 2—ammonium sulphate; No. 3—urea; No. 
4—urephos (Chester loam soil); No. 5—ammonium nitrate; No. 6—am- 
moniated superphosphate; No. 7—cyanamid. 
B. —Growth of beans on Norfolk sandy loam, receiving guanylurea sulphate. 
Acid phosphate and potassium sulphate were added to each pot. 
No. 1—No nitrogen; No. 2—small application of guanylurea sulphate; 
No. 3—medium application of guanylurea sulphate; No. 4—heavy appli¬ 
cation of guanylurea sulphate. 
C. —Growth of beans on Norfolk sandy loam, receiving dicyanodiamide. Acid 
phosphate and potassium sulphate were added to each pot. 
No. 1 —No nitrogen; No. 2—small application of dicyanodiamide; No. 
3—medium application of dicyanodiamide; No. 4—heavy application of 
dicyanodiamide. 
(976) 
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