2.5



 2.0



 Radishes 1.5
Tons/Acre



 1.0



 0.5



 0.0


FIG.VII-11.


e= 1.5


1 2 3 4

 N Cwt/Acre


Response of radishes to N for two different
environments.


poorer environment, with 2.12 cwt of N, is 1.83 tons of
radishes. With prices of $30/cwt for N and $400/ton for
radishes, the most profitable application of N is 2.16 cwt
in the better environment and 1.90 in the poorer. Yield
in each case is 2.96 and 1.82 tons respectively. In the
better environment, the 2.16 cwt N cost $64.80 and the
increased radish production from adding the 2.16 cwt N is
worth $504.00. Profit in the better environment then is
$439.20 and net rate of return to investment is 439.20 /
64.80 = 6.78. In the poor environment, the 1.9 cwt of N
cost $57.00 and increased production was worth $300.00.
Profit in this environment is $243.00 and net rate of
return to investment is 243 / 57 = 4.26.