34 GRASS GROWING FOR PROFIT 
Nitrate always pays handsomely on hay, and 
one hundred pounds per acre alone is a very effective 
application. Even at the present prices for Nitrate, 
one hundred pounds without the use of any other 
fertilizer, will produce an increased yield of more 
than half a ton of barn-cured hay. The use of 
Nitrate on this crop promises to be very remunera- 
tive. 
Stack Cover or Barrack for Hay. In use in New Jersey. 
Whilst the price of Nitrate of Soda per ton may 
seem relatively high, its value should be judged by 
the 100 per cent availability of its Nitrogen — that 
is to say, all the Nitrogen in Nitrate of Soda is 
usable. All other forms must first be nitrated. 
This may be illustrated by comparing gold ores 
of the same percentages derived from different 
sources — one gold ore containing ten ounces to the 
