Root yield and grades are a result of complex interactions
among genotype, plant population and the growing environment.
Considerable variation in grade, root recovery and yield
has been observed among processing varieties that are used for
slicing (slicers) and dicing (dicers) (Rajasekaran et al., 1998,
1999). The relationships between seeding rate, population
density and crop yields have been extensively studied for a
number of horticultural crops. In general, increasing plant
population results in a greater yield per unit area for most crops
until an upper limit is reached for that species. At that point,
competition between adjacent plants limits resources (Pant,
1979) and yields plateau or decline (Weiner, 1990). Swiader
et al. (1995) recommend planting carrot seeds in a 7.6–10.2 cm