Water logging-water stress, Biology

Assignment Help:

Water Logging

Over saturation of soil with water is called water logging. If for any reason, the water-table rises close to the ground surface it is bad for plants and soil fertility. Under water-logged conditions the air in the soil pores is replaced by water creating anaerobic conditions in the soil. Plant roots and aerobic soil biota will perish in oxygen deficient conditions and soil fertility will be lost.

Rising of water-table upto the root zone affects plant growth adversely. When the watertable is near or just below the root zone, water rises upto the soil surface though capillary action. Water evaporates from the soil leaving behind the dissolved salts at the surface soil making it saline (Figure shown below). Unless the salts are somehow washed away or washed down, the soil remains too saline; to grow crops. It is important to prevent excessive irrigation and provide appropriate drainage facilities to prevent rising of water-table.

2107_water logging.jpg


Related Discussions:- Water logging-water stress

Define mineralizations and formation of new bone, Define Mineralizations an...

Define Mineralizations and formation of new bone? Vitamin D plays a role in the synthesis of a prominent non collage nous protein, osteocalcin, a vitamin K- dependent protein f

Define gelatin - tests for presence of exoenzymatic activity, Explain Gelat...

Explain Gelatin - Tests for Presence of Exoenzymatic Activity? Gelatin is an incomplete protein as it lacks amino acid tryptophan. It is a major component of connective tissue

What do you mean by respiratory pigments, Q. What are respiratory pigments?...

Q. What are respiratory pigments? What are some respiratory pigments and in which animal groups can each of them be found? Respiratory pigments are molecules present in the blo

How is the nervous system of molluscs organized, Q. How is the nervous syst...

Q. How is the nervous system of molluscs organized? Molluscs have well-developed sensory structures. It is accepted that cephalopods, like squid and octopus, have eyes with ima

Diagnosis of acute myelogenous leukemia, The most recent blood work of a pa...

The most recent blood work of a patient with a diagnosis of acute myelogenous leukemia (AML) reveals thrombocytopenia. Where is the patient most likely to experience abnormal bleed

Does rna molecule have two polynucleotide chains like dna, Does RNA molecul...

Does RNA molecule have two polynucleotide chains like DNA? Only DNA has two polynucleotide chains. RNA is produced by just one polynucleotide chain. Nucleic Acid Review - Im

Cladogram help, Recent molecular analyses indicate that the artiodactyls, w...

Recent molecular analyses indicate that the artiodactyls, which include hippos and camels, are paraphyletic, whereas cetaceans are monophyletic and cetaceans and hippos form a clad

Determine the prosthetic planning, Determine the prosthetic planning Co...

Determine the prosthetic planning Complete prosthetic planning has to be done and the implants planned accordingly. Thereafter the surgical phase should be carried out. Once th

Explain hormones, What are hormones? Hormones are substances secreted b...

What are hormones? Hormones are substances secreted by the endocrine glands and collected by the circulation that act to make effects upon exact organs and tissues. Hormones

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd