164 Fertilisers [pt. hi, ch. ix 



Salt as manure. Salt acts in two ways: it liberates 

 potash from the soil, and it economises the use of potash 

 in the plant. It can therefore be used with advantage 

 wherever potash is known to be needed. It has proved 

 useful for mangolds on all soils, and on light land for 

 grass and for wheat ^. 



^ Norfolk Chamber of Agric. Expts. 



