Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Aeration
A well-aerated soil is one in which gases are available to plant roots and other soil organisms, in sufficient quantities and in proper proportions to support their normal respiratory activities. It is important that oxygen which is necessary for soil biota is continuously renewed to support metabolic activities.
A soil which is considered well aerated must have the following two characteristics. First, sufficient space for air movement should be present. Second, there must be ample opportunity for the ready movement of gases into and out of the soil. Soil aeration is an important factor having far reaching influence on the metabolic activity of plant roots and other soil organisms. Continuous supply of oxygen in the soil is necessary to sustain soil organisms.
One of the most apparent effects of poor soil aeration is the reduction in the rate of organic matter decomposition, which you might recall is an essential process to maintain soil fertility. The reduced rate of break down of organic matter is due to the lack of oxygen rather than from the built up of carbon dioxide. Accumulation of organic matter in swampy areas shows that the lack of oxygen retards the decomposition of organic matter.Aerobic soil organisms are unable to survive in the absence of gaseous oxygen. For example, bacteria that are responsible for the oxidation of nitrogen and sulphur are relatively ineffective in poorly aerated soils. This is also true for the symbiotic nitrogen fixers and some of the free living nitrogen fixers such as azotobacter.
Higher plants are also adversely affected by poor soil aeration because the root growth is curtailed; nutrient and water absorption is adversely affected; and certain toxic elements accumulate in poorly aerated soils.
Explain the Steps of Exercise You have learnt the steps of exercises in Block 3, Unit 1 of theory block. Let us review the steps. In aerobic exercises one has to under go fo
HISTORY OF CELL BIOLOGY Scientific knowledge grows with the development of new tools and techniques for studying various physical and biological processes. This is true also of t
Define Assessment of Manganese Status? The body Mn status has not been yet established by laboratory tests. Though the normal range of serum Mn concentration is found out to b
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
Define Disadvantages of Direct Microscopic Count? 1. Small cells are difficult to see under the microscope and may be missed. 2. It gives total count, i.e., both live and de
Q. What is a mixed gland? Why the pancreas is considered a mixed gland? Mixed gland is a gland that produces exocrine and endocrine secretions. The pancreas is an example of
The cell membrane is produced of lipids, proteins and carbohydrates. The membrane lipids are phospholipids, a particular type of lipid to which one extremity a phosphate group i
What is the difference between xylem and phloem? Both xylem and phloem are vascular tissues found in a plant. Xylem is a tubular structure, which is liable for water transport
Define Serum Vitamin A Content? Assessment of serum vitamin A content is the most reliable criterion Tor assessing vitamin A status. Serum levels indicative of various degrees
Oxidation of malate to oxaloacetate Oxidation of malate to oxaloacetate: Malate is oxidized to oxaloacetate by malate dehydrogenase and NAD' is required as coenzyme. Thi
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd