||The purpose of the study was to determine the influence of technological factors: sowing time, row spacing and seeding rates
on biometric indicators and seed yield of fennel when grown under the conditions of the Western Forest Steppe.
Results. The dependence of formation of plant productivity and yield of fennel seeds on technological factors has been
established: sowing period (1st decade of April, for LTR of soil 6–80C), (2nd decade of April, for LTR of soil 10–120C); row
spacing (15, 30, 45 and 60 centimeters) and seeding rates (1, 1.5 and 2 million sprouting seeds per hectare).
Studies have found that the height of plants, the number of shoots of the 1st order and the mass of seeds from a plant
depend on the studied factors. The most productive plants ‒ with a weight of seeds of 1.57 grams were formed on variants
sown with a row spacing of 45 cm, seeding rate of one million sprouting seeds per hectare for sowing in the first decade of
April. The yield analysis showed that in this variant for sowing in the first period the average yield for 2015–2019 was 1.48
t/ha, in the second term ‒ 1.4 t/ha. Variational variability of biometric indices in terms of variants is determined.
Conclusions. The growth, development, and productivity of fennel plants depended on biological factors (the level of
soil thermal regime at the time of sowing) and technological factors, in particular, the placement of plants per unit area.
Biometric analysis showed that the optimal plant parameters were observed on the sowing variant in the first decade of April
with a seeding rate of 1 million sprouting seeds per hectare, with a row spacing of 45 cm, plant height averaged 144 cm
over the years of research, the number of shoots of the first order ‒ 10.5 pieces per plant and the weight of seeds from the
plant ‒ 1.57 grams. Seed yields of this variant were 1.48 tons per hectare.