Sources of nutrients
Sources of Nutrients
Sources of Nutrients:
Plants obtain carbon from the carbon dioxide present in the air, hydrogen from water and oxygen from air and water. They get the remaining nutrients from the soil. Soil is, therefore, the most important source of various plant nutrients.
Plants, unlike animals, do not require organic materials for their nutrition from other bodies they obtain organic material in large quantity from their tissues. By using the solar energy in the process of photosynthesis, they are able to synthesize nutrients from carbon dioxide (CO2) and water . However, plants do require inorganic salts, which they absorb from the soil surrounding their roots; these include the elements phosphorus (in the form of phosphate),chlorine (as the chloride ion),potassium,sulphur, calcium, magnesium, iron, manganese, boron, copper, and zinc. Plants also require nitrogen, in the form of nitrate (NO3−) or ammonium (NH4+) ions. Moreover they absorb other inorganic compounds such as iodides and cobalt and selenium salts which they do not require.
The soil gets nutrients as a result of rains there is a gradual breakdown of the rocky material on Earth’s surface. Primarily composed of alumina and silica, rocks also contain smaller amounts of all the mineral elements needed by plants. Another source of soil nutrients is the decomposition of dead plants and animals and their waste products. Earthworm and other millions of microorganisms are a part of the soil, which helps in break down organic materials, releasing simpler mineral salts. Furthermore, two groups of bacteria fix atmospheric nitrogen that is, they are able to add relatively inert element into nitrate ions.
1. Bacteria of the genus Azobacter live freely in soil,
2. Bacteria of the genus Rhizobium live sheltered in the roots of leguminous plants such as peas and beans.
3. Cyanobacteria (blue-green algae) also can fix nitrogen and are important for growing rice in the flooded paddy fields of Southeast Asia.
In areas of intensive farming, where crops are harvested at least once a year and no animals browse the fields, human intervention in the form of fertilizers is important. A traditional form of fertilizer has been animal manure, or muck, made from the straw bedding of cattle that has been soaked in excreta and allowed to ferment for a period. Since the 1800's farmers also have used artificial fertilizers, at first using naturally occurring mixtures of chemicals such as chalk (supplying calcium), rock phosphates, and the natural manure known as guano. Commercial guano consists of the accumulated deposits of bird droppings and is valued for its high concentration of nitrates. Modern chemical fertilizers include one or more of three important elements: nitrogen, potassium, and phosphorus. Most nitrogenous fertilizers are produced by a technique in which nitrogen and hydrogen are combined at very high pressures in the presence of catalysts to form ammonia (NH3). This can then be injected into the soil as a gas that is quickly absorbed or, more commonly, converted into solid products such as ammonium salts,urea, and nitrates, which can be used as ingredients in mixed fertilizers.
Plants get hydrogen from __________________. | |||
| Right Option : B | |||
| View Explanation | |||
Plants get carbon dioxide from __________________. | |||
| Right Option : B | |||
| View Explanation | |||
Which of the following are correct : (a) Plants obtain carbon from the carbon dioxide present in the air. (b) Plants obtain hydrogen from water and oxygen from air and water. (c) Soil is the most important source of various plant nutrients. | |||
| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [20]
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thMy experience with Abhyas Academy has been very good. When I was not in Abhyas whenever teacher ask questions I could not speak it confidently but when I came in Abhyas, my speaking skills developed and now I am the first one to give the answer of teachers question.
Upmanyu Sharma
7thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
10thAbhyas is an institute of high repute. Yogansh has taken admission last year. It creates abilities in child to prepare for competitive exams. Students are motivated by living prizes on basis of performance in Abhyas exams. He is satisfied with institute.
Yogansh Nyasi
7thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thWhen I have not joined Abhyas Academy, my skills of solving maths problems were not clear. But, after joining it, my skills have been developed and my concepts of science and SST are very well. I also came to know about other subjects such as vedic maths and reasoning.
Sharandeep Singh
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Om Umang
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Prisha Gupta
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
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Shivam Rana
7thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thThe experience was nice. I studied here for three years and saw a tremendous change in myself. I started liking subjects like English and SST which earlier I ran from. Extra knowledge gave me confidence to overcome competitive exams. One of the best institutes for secondary education.
Aman Kumar Shrivastava
10thMy experience with Abhyas academy is very nice or it can be said wonderful. I have been studying here from seven class. I have been completing my journey of three years. I am tinking that I should join Abhyas Academy in tenth class as I am seeing much improvement in Maths and English
Hridey Preet
9thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
Aman Kumar Shrivastava
10thAbhyas is good institution and a innovative institute also. It is a good platform of beginners.Due to Abhyas,he has got knoweledge about reasoning and confidence.My son has improved his vocabulary because of Abhyas.Teacher have very friendly atmosphere also.
Manish Kumar
10thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
