Water logging-water stress, Biology

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

Posted Date: 12/11/2012 12:38:07 AM | Location : United States







Related Discussions:- Water logging-water stress, Assignment Help, Ask Question on Water logging-water stress, Get Answer, Expert's Help, Water logging-water stress Discussions

Write discussion on Water logging-water stress
Your posts are moderated
Related Questions
Describe how a phagocyte destroys bacteria. The phagocyte forms a pouch in its cell membrane and engulfs bacteria in the pouch. It then pinches off the pouch to produce a vesi

What sources of water are (a) most likely, (b) least likely to contain pathogenic bacteria?   (a) Water most likely to have pathogenic bacteria will be that which receives u

Define Specialized Nutritional Formulations for CHD? Achieving calorie and protein requirements with restricted fluid intake, you would realize, is a formidable challenge. Hig


Explain the Observation or Inference for seliwanoff's test? 1. Wine or cherry red colour seen. Wine red colour confirms the presence of a ketose sugar. Note: On overheating

Calculate the pH: 300mL of 0.25M sodium ascorbate plus 150mL of 0.2M HCl (the pKa of ascorbic acid is 4.04) okay, what's the conjugate acid and base of this problem? Can someone wa

in what aspect are the cnidarians similar to protozoans? to the poriferans?

The several types of steam sterilizers that are in use. 1. Lab Autoclave 2. Hospital dressing sterilizer 3. Bowl & instrument sterilizer 4. Rapid cooling sterilizer

EXPERIMENTS OF MENDEL MONOHYBRID CROSSES When only a single pair of contrasting or differentiating traits is considered in a cross (or inheritance of only one pair of cont

Define the Classifications of carbohydrates based on number of carbon?   A chain-form monosaccharide that has a carbonyl group (C= O) on an end carbon forming an aldehy