Carrot Population Density and Yield in an Arid Environment
1969
Robinson, Frank E.
Five plant densities of carrots, Daucus carota L. cultivar ‘Long Imperator #58,’ were studied under sprinkler irrigation in the arid Imperial Valley, California. Carrots on a 10-cm square grid (870,000 per hectare) produced the least dry matter but the earliest roots of marketable size (35 T/ha). Twenty-five days later plants in a 5.1-cm square grid (3,370,000 plants per ha) produced both greater dry matter yields and yields of roots of marketable size (94 T/ha). The three greater densities of 13,590,000, 54,390,000, and 223,050,000 plants per ha produced greater dry matter yields but did not reach marketable size. Root-to-top ratios were approximately 1:1 in the two greatest densities and 2:1 in the three lowest densities.
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