PLATE XX 
Fig. i.—Clover plants, showing influence of sulphates on growth, i, Check; 2, 
nitrogen, phosphorus, potassium; 3, nitrogen, phosphorus, potassium, plus sulphur as 
sodium sulphate; 4, nitrogen, phosphorus, potassium, plus sulphur as calcium sul¬ 
phate; 5, sodium sulphate only; 6, calcium sulphate only; 7, elemental sulphur 
only. 
Fig. 2.—Radish plants, showing influence of sulphates on growth. 1, Check; 2, 
nitrogen, phosphorus, potassium; 3, nitrogen, phosphorus, potassium, plus sulphur 
as sodium sulphate; 4, nitrogen, phosphorus, potassium, plus sulphur as calcium 
sulphate; 5, sodium sulphate only; 6, calcium sulphate only; 7, elemental sulphur 
only. 
Fig. 3.—Radish plants, showing influence of sulphates on growth. 1, Check; 2, 
nitrogen, phosphorus, potassium; 3, nitrogen, phosphorus, potassium, plus sulphur as 
sodium sulphate; 4, nitrogen, phosphorus, potassium, plus sulphur as calcium sul¬ 
phate; 5, sodium sulphate only; 6, calcium sulphate only; 7, elemental sulphur 
only. 
