NEET Biology Mineral Nutrition Notes

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Study Material for NEET Biology Mineral Nutrition

NEET Biology students should refer to the following Pdf for Mineral Nutrition in NEET. These notes and test paper with questions and answers for NEET Biology will be very useful for exams and help you to score good marks

NEET Biology Mineral Nutrition

 

 All living organisms require macromolecules like carbohydrates, proteins, fats and minerals for the development.
• Various chemical substances that provide nourishment to living organism are called nutrients.
 In addition to carbon, hydrogen and oxygen plants require a variety of mineral elements for their survival.
• Absorption of minerals and their utilization by plant is called mineral nutrition.
 Only the green plants (called autotrophs) can prepare their own food from simpler substances, rest of the living organisms depend on them directly or indirectly for food.
All non-green plants and animals including human beings are heterotrophs. Autotrophic green plants obtain their nutrition from inorganic substances present in soil in the form of minerals, known as mineral elements or mineral nutrients.
 
METHODS TO STUDY THE MINERAL REQUIREMENT OF PLANTS
 
 In 1860, Julius von Sachs, a prominent German botanist, demonstrated for the first time that plants could be grown to maturity in a defi ned nutrient solution in complete absence of soil. This technique of growing plants in a nutrient solution is known as hydroponics or soilless growth.
 After a series of experiments in which the roots of the plants were immersed in nutrient solutions and wherein an element was added/ removed or given in varied concentration, a mineral solution suitable for the plant growth was obtained.
 By this method, essential elements were identified and their deficiency symptoms discovered.
 Hydroponics has been successfully employed as a technique for the commercial production of vegetables such as tomato, seedless cucumber and lettuce.
 It must be emphasised that the nutrient solutions must be adequately aerated to obtain the optimum growth.
NEET Biology Mineral Nutrition Notes
 
 
 Because the plants are grown in large tanks, the process of soilless cultivation is also called as tank farming.
 Hydroponic culture solution was fi rst prepared by Knop. The famous nutrient solutions are Knop solution, Hoagland solution, Arnon’s solution and Sach’s solution
 Hydroponic or soilless culture helps in knowing–
• the essentiality of mineral nutrients.
• the defi ciency symptoms developed due to non-availability of particular nutrients.
• toxicity of plant when element is present in excess.
• the possible interaction among different elements present in plants.
• the role of essential elements in the metabolism of plants.
 Hydroponic is useful in areas having thin, infertile and dry soils. They conserve water, can regulate pH optimum for a particular crop, control pests and disease, avoid problems by weeding, reduces labour cost etc.
 
 
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NEET NEET Biology Mineral Nutrition Study Material

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