Cultivation
Helianthus annuus L.
A critical factor in sunflower yield that determines plant access to moisture and nutrients. Optimal seeding density depends on hybrid characteristics, moisture levels, and planned agronomic practices.
In the reference 247 varieties crop Sunflower, where this is mentioned in the description.
Excessive sunflower plant density leads to a decrease in 1000-seed weight, as well as a reduction in head diameter and oil content. Overly high plant density results in plant deformation, "stretching," uneven ripening, an increased risk of disease development, and damage to the crop during harvesting.
The seeding rate varies depending on regional moisture levels: from 35–45 thousand plants per hectare in arid zones to 50–60 thousand plants per hectare in conditions with sufficient moisture or on irrigated plots. When calculating the field rate, an adjustment for field emergence is taken into account, which is usually 10–25% lower than laboratory germination, as well as an 8–10% adjustment needed when planning mechanical harrowing after emergence.
General information about the subject — on the page Planting density.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Helianthus annuus L. · Sunflower
ASGROW SEED CO
Helianthus annuus L. · Sunflower
Maurizio Lottari
Helianthus annuus L. · Sunflower
Yanul` Viktor Pavlovych, Baian Ezhefne, Synysha Iotsych, Drahan Shkorych,
Helianthus annuus L. · Sunflower
Parii Anna Fedorivna, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych, Parii Fedir Mykytovych,
Helianthus annuus L. · Sunflower
Babich Valerii Hryhorovych, Hanzhelo Mykola Hryhorovych, Libenko Mykola Oleksandrovych, Krut`ko Vasyl` Ivanovych, Kolomatska Valeriia Pavlivna, Makliak Kateryna Mykolaivna, Kyrychenko Viktor Vasylovych,
Helianthus annuus L. · Sunflower
JOSE RAMON PEREZ MONREAL
Helianthus annuus L. · Sunflower
Northrup King Semences SA (FR)
Helianthus annuus L. · Sunflower
Miladinovic Dragana, Radeka Ilija, Dedic Bosko, Jockovic Milan, Cvejic Sandra, Jocic Sinisa,
Helianthus annuus L. · Sunflower
Radic Velimir, Dusanic Nenad, Miklic Vladimir, Miladinovic Dragana, Tsveich Sandra, Jocic Sinisa,
Helianthus annuus L. · Sunflower
Malidza Goran, Miklic Vladimir, Miladinovic Dragana, Cvejic Sandra, Jocic Sinisa,
Helianthus annuus L. · Sunflower
Annabelle RABLAT
Helianthus annuus L. · Sunflower
Stepanov IEvhenii Olehovych, Parii IUliia Oleksandrivna, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych, Parii Fedir Mykytovych,
Helianthus annuus L. · Sunflower
AGRA SEED RESEARCH INTERNATIONAL
Helianthus annuus L. · Sunflower
Hostieva Natalia Volodymyrivna, Hostiev IEvhen IUriiovych,
Helianthus annuus L. · Sunflower
Helianthus annuus L. · Sunflower
Borovs`ka Iryna IUriivna, Petrenkova Vira Pavlivna, Brahin Oleksandr Mykolaiovych, Tymchuk Serhii Mykhailovych, Satarov Oleksandr Zainulovych, Syvenko Oleksandr Anatoliiovych, Popova Ol`ha Andriivna, Kolomatska Valeriia Pavlivna, Syvenko Valentyna Ivanivn
Helianthus annuus L. · Sunflower
Dedic Bosko, Imerovski Ivana, Miladinovic Dragana, Cvejic Sandra, Jocic Sinisa,
Helianthus annuus L. · Sunflower
Dusanic Nenad, Gvozdenovic Sandra, Jocic Sinisa,
Helianthus annuus L. · Sunflower
Cvejic, Sandra Dusanic, Nenad Jockovic, Milan Miklic, Vladimir Mykhno, Mykola Jocic, Sinisa
Helianthus annuus L. · Sunflower
KOSOLAPOV SERGEJ NIKOLAEVICh / KOYuDA SERGEJ PETROVICh / DOROGOBED ALEKSEJ ALEKSEEVICh
Helianthus annuus L. · Sunflower
Karapira Serhii Ivanovych, Babich Valerii Ivanovych, Hanzhelo Mykola Hryhorovych, Krut`ko Vasyl` Ivanovych, Varenyk Borys Fedorovych, Veselyi Vitalii Oleksandrovych, Syvenko Valentyna Ivanivna, Kolomatska Valeriia Pavlivna, Makliak Kateryna Mykolaivna,
Helianthus annuus L. · Sunflower
Helianthus annuus L. · Sunflower
Helianthus annuus L. · Sunflower