Tissue levels as low as 25 ppm have been recorded in healthy whole tops. Foliar sprays will correct a deficiency. Fertiliser programs Fertiliser programs suggested for carrots on new land, or where crop residues are poor, are shown in Table 2 for three cropping situations. The nutrients needed by a crop over its whole life are shown in Table 3. The higher rate to be applied on a summer grown crop only.
All water is from underground aquifers.
Sandy soils have a low moisture holding capacity and irrigation is needed from one to four times daily in summer. The only practical method of scheduling irrigation on these soils is by evaporation replacement. To schedule irrigation, growers should construct their own evaporimeter, or use evaporation data from Agriculture Western Australia Research Stations or local Bureau of Meteorology figures. Irrigate to replace daily evaporation plus 50 per cent for carrots on sandy soils. This can be done by measuring output with 5 to 10 rain gauges placed in the sprinkler bed for a 14 day period and recording times and rain gauge levels.