The growth of a tree is influenced by both internal and exte | Agriculture | 55684
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External Factors of Tree Growth (Environmental Factors): These are outside the plant’s control and come from the environment: Light (Sunlight Intensity & Duration): Essential for photosynthesis. Affects leaf size, orientation, and growth rate. Insufficient light causes spindly, weak growth. Temperature: Influences enzymatic activities and metabolic rate. Extremely high or low temperatures can slow or stop growth. Water Availability: Crucial for nutrient transport, photosynthesis, and turgor pressure. Drought limits growth, while excess water can cause root rot. Soil Conditions: pH, texture, structure, and organic matter affect root development and nutrient uptake. Poor soil can restrict root growth and anchorage. Nutrient Availability: Macronutrients (N, P, K) and micronutrients (Zn, Fe, Mg, etc.) are essential. Deficiencies can cause stunted growth and chlorosis. Air Quality & CO₂ Concentration: Clean air and sufficient CO₂ enhance photosynthesis. Pollution or smog can damage leaves. Wind: Mild wind strengthens trunk and branches. Strong winds can break limbs or uproot trees. Biotic Factors: Pests, diseases, herbivores, competition from other plants can hinder growth. 🌱 Internal Factors of Tree Growth (Physiological Factors): These are controlled by the tree’s own genetic and biochemical processes: Genetic Makeup (Species/Variety): Determines potential height, growth rate, leaf shape, lifespan, etc. Plant Hormones (Phytohormones): Auxins: Promote stem elongation and root initiation. Gibberellins: Stimulate cell elongation, seed germination. Cytokinins: Promote cell division and delay aging. Abscisic Acid (ABA): Induces dormancy and stress resistance. Ethylene: Involved in fruit ripening and leaf abscission. Apical Dominance: The tip of the tree inhibits growth of lower branches through hormonal control (auxins). Rate of Cell Division & Elongation: Controlled by DNA and hormones, determines how fast a tree grows. Dormancy & Seasonal Rhythms: Many trees enter dormancy in unfavorable seasons, guided by internal cues. Age of the Tree: Young trees grow faster; growth slows as the tree matures.
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Simple yet insightful! You’ve turned science into an engaging visual journey