Plant hormones are specialized chemical substances produced by plants. They are the main internal factors controlling growth and development. Hormones are produced in one part of a plant and transported to others‚ where they are effective in very small amounts. Depending on the target tissue‚ a given hormone may have different effects. Plant hormones play an integral role in controlling the growth and development of plants. A plant hormone is generally described as an organic compound synthesized
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Auxin Auxin are essential plant hormones that promote the lengthening of the cell‚ which is a critical step before the cell goes through cell differentiation. The auxin can do this by increasing the amount of water taken in by the cell‚ which improves the elasticity of the cell and therefore can take more water and can get increasingly longer. And don’t think for a second that that’s all auxins do auxins may have been the first plant hormone to be discovered doesn’t make it the least important
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The major difference between mechanization and tractorization is that tractorization falls under mechanization hence it can be said to be used extensively in mechanization agriculture . Agricultural mechanization is not an end in itself‚ but a means of development. Hence its goal is sustainable and socially beneficial in Agriculture. BRIEF HISTORY ON TRACTORIZATION Tractorization is the use of Tractor
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Introduction: Plant hormones and growth regulators are chemicals that affect flowering‚ aging‚ root growth‚ killing of leaves‚ promotion of stem elongation‚ color enhancement of fruit‚ prevention of leafing‚ and many other conditions. Very small concentrations of these substances produce major growth changes. All plants produce hormones naturally‚ and growth regulators can be applied by people to are applied to plants by people. Plant growth regulators may be synthetic compounds that mimic naturally
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Plant hormones can be utilized in the commercial agriculture of important crops such as grapes‚ pineapple‚ watermelons and strawberries. In the production of grapes the plant hormone gibberellin is used. Gibberellins are derivatives of gibberellic acid. They are natural plant hormones and promote flowering‚ stem elongation and break dormancy of seeds. The hormone is used to thin the flowers so as to minimize the competitive effect of early fruiting on vegetation growth. The hormone is also used
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Hormones Every living organism on Earth has some sort of organ system. For example‚ humans have their endocrine system. The endocrine system is a group of organs that release different biological substances called hormones. There are vast amounts of hormones‚ which means there are multiple uses that are necessary for survival. Hormones have multiple roles in the human body. For example‚ they assure that growth‚ development and maturation occurs properly and on time. Also hormones‚ help control
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HORMONES Hormones are a class of regulatory biochemicals produced in all multicellular organisms by glands‚ and transported by the circulatory system to a distant target organ to coordinate its physiology and behavior. They serve as a major form of communication between different organs and tissues. Hormones regulate a variety of physiological and behavioral activities‚ including digestion‚ metabolism‚ respiration‚ tissue function‚ sensory perception‚ sleep‚excretion‚ lactation‚ stress‚ growth and
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Touch receptors called Meissner’s corpuscles are found in the papillary region of the dermis of the skin. When nothing is touching the skin‚ a voltage difference known as the (1) ___________ _____________ _____________ exists across the plasma membrane. Leakage channels‚ also called passive channels‚ allow the movement of potassium (and sodium) across the membrane. Due to the electrochemical gradient‚ (2) ___________________ (ion) diffuses out of the cell. Because of this and because proteins that
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Introduction: Agriculture is an art‚ science and industry of managing the growth of plants and animals for human use. In broad sense‚ agriculture includes cultivation of the soil‚ growing and harvesting the crops‚ breeding and raising livestock‚ daring and forestry. Modern agriculture is engineering and technology based. Therefore‚ mechanization has eased much of the back breaking toil to the farmer. Agriculture is the backbone of economy of most of the countries of the world. About 48 percent
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means by which more food can be grown than before‚ on the same piece of land. Improved methods of agriculture have led to the production of about 360m tonnes of plant food products and about 88m tonnes of animal food products. OBJECTIVES After completing this lesson‚ you will be able to: • state reasons for human dependence on plants and animals for food; • define and differentiate between agriculture and horticulture; • list and explain the various steps for raising an improved crop; • differentiate
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