Growth regulators and mineral fertilizers effect on morphometric indicators and decorative qualities of Zinnia elegans varieties by Nikolay Vasilyevich Smolin, Alexander Vasilyevich Ivoilov, Viktor Viktorovich Volgin, Natalya Vasilyevna Potapova, Alexander Nikolaevich Nikolskiy, Julia Nikolaevna Nedayborshch, Ilya Vladimirovich Potapov

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