According to techno-economic and environmental criteria, all
results converge and establish that dry-season irrigated systems
are performing less well than other systems. They use blue water
(while other systems rely mostly on green water), require more
energy, labour and agrochemicals, and ultimately yield lower production.
As a result, gross and net incomes are lower. Although
these results refer to only one year, they tend to explain why only
half of irrigated land is actually cultivated during the dry season.