"SCIENCE Life Sciences Anatomy & Physiology." . . . . "Plant regulators." . . "Plant regulators" . "Electronic books." . . "Synthetic plant growth regulators" . . "Synthetic plant growth regulators"@en . "Synthetic plant : growth regulators"@en . . . . . "Synthetic plant growth regulators are inorganic substances made by physical chemistry that affect plant growth. Some mimic the natural growth regulators in structure and action. Many are completely different to natural regulators both in structure and action. They are applied for specific purposes to affect specific plant responses. Achieving the best results with PGRs is a combination of art and science-science tempered with a lot of trial and error and a good understanding of plant growth and development. Several new plant growth regulators have come on the market for use in plants in recent."@en . . . "Livres électroniques" . . . "Electronic books"@en . "Electronic books" . . . . "Growth regulators"@en . . . . . . . .