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

St depression at rest, Q. What is ST depression at rest? As early as 19...

Q. What is ST depression at rest? As early as 1965 Ostrand called attention to the syndrome of short PR interval without accelerated conduction and it's association with ST dep

Define about the food effects on drug metabolism, Define about the Food Eff...

Define about the Food Effects on Drug Metabolism? The general tendency of the process of metabolism is to transform a drug from a lipid- soluble to a more water-soluble compoun

Cryobiology, Cryobiology : This is the study of life at low temperature. Cr...

Cryobiology : This is the study of life at low temperature. Cryobiology is that branch of biology which studies the effects of low temperatures on living things. Cryobiology scienc

Difference between recessive allele and dominant allele?, What is the diffe...

What is the difference between recessive allele and dominant allele? The Dominant allele is the allele that determines phenotypical features that manifest in heterozygous or ho

Genital warts and human papillomavirus infection, Genital warts and human p...

Genital warts and human papillomavirus (hpv) infection External genital warts are caused by human papillo- mavirus, usually type 6 or 11; other types (16, 18 and others) cause

Succession, why succession more likely to occur on valley floor than steep ...

why succession more likely to occur on valley floor than steep slopes

Justify the term – flagella, In protozoans flagella are found always one pe...

In protozoans flagella are found always one per cell. Flagella and Cilia can generate substantial force as they try to push or pull a protozoan through water. To be able to do that

Pisciculture, Pisciculture: This is the culturing of fishes. There is a pri...

Pisciculture: This is the culturing of fishes. There is a principal form of aquaculture called Fish farming, while other methods can come under mariculture. Fish farming main aim i

Amitosis, AMITOSIS This  is  direct  cell division  in which  the genet...

AMITOSIS This  is  direct  cell division  in which  the genetic material is not duplicated and  hence its distribution  to the daughter cells  is not  precisely half  and half,

How to increase the levels of physical activity, How to increase the levels...

How to increase the levels of physical activity? The benefits of physical fitness should be spread among the public through mass media. 1. Physical activity should be encour

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