The average yields of Lachlan Valley Processing tomato growers is less than 50 tonnes/ha. Monitoring the water use of the tomato crops using a Neutron Probe (and water mulch) has shown that by understanding soil moisture, crop water use (evapotranspiration), and responding accordingly, growers are able to increase yields by as much as 100%. As a result of the success of the co-operative extension program scheduling of all the valley tomato crops was undertaken during the 91/92 season using Neutron Probes.