38 GRASS GROWING FOR PROFIT 
mineral acid residue left in soils after the use of 
Nitrate. 
It is now known that there is not as much danger 
of it being leached out of the soil by the rains 
during the growing season as has been generally 
believed, since the rains seldom reach lower than 
the bottom of the furrow, and the movement of the 
soil moisture is vertical and not horizontal. How- 
ever, soil moisture is strongly held by good soils by 
capillary attraction. 
Pressing Hay. Process Interrupted. 
Nitrate of Soda looks somewhat like common 
dairy salt, and horses, cows and Sheep, if they can 
get to it, may eat it to an injurious extent. 
The emptied bags, especially in damp weather, 
have more or less Nitrate adhering to them. After 
