Castro et al. (2006) found that
irrigation with fish effluent enhanced tomato fruit number and
productivity in the first three analyzed harvest periods. However,
the increase in fruit number in treatments that received fish effluent
resulted in lower mean fruit weight. They found that even
with reduction on fruit mean weight, the increase in fruit number was enough to elevate the total productivity. Prinsloo and
Schoonbee (1987) also observed an increase in tomato yield from
64.5 to 95.8 t ha−1 when plants were irrigated with fish effluent
in comparison with plants which were irrigated with well
water.