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Sowing
methods
The
low 1000 seed count weight of the onion seeds, the relatively small
quantity of seeds/ ha and the high demands on regular plant arrangements
make the use of modern, high-quality precision sowing machines necessary.
Apart
from such "obvious requirements" as careful treatment of the seeds,
exact sowing, reliability etc., it is of vital importance that the
sowing depth is constant (see weed control). It is recommendable
to use granulate spreaders, which permit row treatment with application
of the insecticide.
Principally,
the cultivation in seedbeds is nowadays most common. The width of
the bed depends on the existing machines. It is important that the
distance between the rows is constant and that appropriate plant
stands are established. Phytosanitary and technical reasons impede
the optimum use of the existing space by means of broadcast sowing.
Depending
on the sowing method, which itself depends on the soil type, the
seeds can be sowed in individual or double rows (3-5 cm). Double
rows require a larger distance between the rows.
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Onions
