Ion exchange theory:
The mineral elements are absorbed in the form of ions. The cations and anions in the plant cells are replaced with the anions and cations of equal charge from the external medium in which the cells are kept. This method can be described by two theories:
Contact exchange theory:
This was introduced by Overstreet and Jenny in 1939. According to this theory ions are transferred from soil particles to root or vice-versa without passing into solution. The ions are electrostatically absorbed to the surface of root cells or clay particles and held strongly. Such ions oscillate in a small volume of space termed as oscillation volume. Whenever the oscillation volume of two ions of similar charge overlaps, one is replaced for the other. This is termed as contact exchange.
Figure: Contact exchange theory
Carbonic acid exchange theory:
According to this theory the soil solution plays a significant role in exchange of ions by giving a medium. CO2 discharged during respiration joins with water to form carbonic acid (H2CO3) that dissociates as H+ (Hydrogen ions) and HCO3- (bicarbonate ions). A cation absorbed on clay micelle might be replaced with H+ of soil solution and this cation diffuses into the root in exchange for H+ ion.
Figure: Carbonic acid exchange theory
Latest technology based Biology Online Tutoring Assistance
Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Mineral Nutrition homework help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Mineral Nutrition, project ideas and tutorials. We provide email based Mineral Nutrition homework help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Mineral Nutrition. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Biology homework help and assignment help services. They use their experience, as they have solved thousands of the Biology assignments, which may help you to solve your complex issues of Mineral Nutrition. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
tutorsglobe.com symbiosis assignment help-homework help by online nutrition in fungi tutors
tutorsglobe.com deflation assignment help-homework help by online inflation and deflation tutors
Intestinal and urogenital protozoa tutorial all along with the key concepts of Amebae, Amebiasis, species of Entamoeba, Giardia and Giardiasis
Theory and lecture notes of Equilibrium in the Flexible-Price Model all along with the key concepts of equilibrium in the flexible-price model, Real Interest Rate, Capital Inflow, Flow-of-Funds Market. Tutorsglobe offers homework help, assignment help and tutor’s assistance on equilibrium in the flexible-price model.
Types of Compounds Found in Plants tutorial all along with the key concepts of History-Background of Natural Products, Classification of Natural Products, Terpenoids and steroids, Alkaloids, Fatty acid and polyketides
tutorsglobe.com hybridization assignment help-homework help by online atomic structure tutors
There is a unique adjustment for every channel. Resonance is acquired with coil’s distributed capacitance, stray and trimmer capacitors. The oscillator coil is generally constructed with an aluminium or brass screw as the core for fine tuning.
Get the most excellent Network Analysis and Devices Assignment Help anytime and from anywhere at the most feasible prices to secure A++
tutorsglobe.com fractures assignment help-homework help by online bones and joints tutors
Theory and lecture notes of Stock Market and Interest Rates all along with the key concepts of stock market and interest rates, Stock Market, Interest Rates. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Stock Market and Interest Rates.
tutorsglobe.com interhalogen compounds assignment help-homework help by online p block elements tutors
tutorsglobe.com physical and chemical basis of heredity assignment help-homework help by online chromosomal basis of inheritance tutors
From the horizontal oscillator, Horizontal frequency 15,625Hz is delivered to the horizontal driver transistor BD115. The collector voltage is delivered by Rt and primary of driver transformer. Emitter is being earthed.
Application of the Iso-quinoline Ring System tutorial all along with the key concepts of Papaverine, Synthesis of Papaverine, Morphine, Isoquinolines and Parkinson's disease
tutorsglobe.com distinguishing features of fungi assignment help-homework help by online fungi tutors
1961747
Questions Asked
3689
Tutors
1493123
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!