GRASS GROWING FOR PROFIT 7 
the organic forms of Nitrogen, which exist in the 
soil only in an insoluble form which -cannot be 
utilized by the plants as food, can be converted into 
soluble Nitrates by the action of bacteria in the soil. 
This does not occur to any great extent until the soil 
warms up to summer temperature when it is too late 
in the season to benefit the crop’s early spring 
growth, 
Types of Characteristic Rock Shattering (2). 
It is important that we always bear in mind the 
fact that our only source of Nitrogen in the soil for 
all plants is the remnants of former crops (roots, 
stems, dead leaves, weeds, etc.) in different stages 
of decomposition, and that in the early spring there 
is always a scarcity of Nitrogen in the soil in an 
available form, for the reason that the most of that 
which was converted into soluble forms by the 
action of the soil bacteria during the warm summer 
months of the previous year was either utilized by 
