Permanent wilting percentage (pwp), Biology

Permanent Wilting Percentage (PWP)

It is the percentage of moisture in the soil at which a plant wilts and does not recover unless water is added to the soil. PWP for clay is about 26%, for silt 10% and for sand 3-5%. It must be noted that PWP is used to express property of a soil not any feature of the plant. However, the moisture content at which any plant shows permanent wilting need not be the same for all plants even in the same soil. This happens because some plants are prone to wilting at fairly reasonable water content of soil while others wilt only when the moisture content is very much reduced.

The water status of a plant in terms of FC and PWP is significant only if the soil properties are known. This is because the soil determines the availability of water. However, it is desirable as well as easier to express soil water status in terms of water potential so that soils become uniform with respect to water.

Posted Date: 1/17/2013 1:49:23 AM | Location : United States







Related Discussions:- Permanent wilting percentage (pwp), Assignment Help, Ask Question on Permanent wilting percentage (pwp), Get Answer, Expert's Help, Permanent wilting percentage (pwp) Discussions

Write discussion on Permanent wilting percentage (pwp)
Your posts are moderated
Related Questions
A student set up a potometer in the laboratory and measured the rate of movement of water in the capillary. An average of four readings gave a rate of 50mm per minute. The apparatu

Define early ebb or shock phase - Physiological Response to injury? This is usually brief in duration lasting 12 to 24 hours and occurs immediately following injury. Blood pres

Explain the OBJECTIVES of history of mart disease? After reading this unit, you should be able to: 1. Understand the importance of Cardio-vascular diseases as the leading cause

Kinds of Succession - Ecology The ecological succession can be broadly classified into two kinds, on the basis of the nature of the habitat. Figure: Kinds of Success

1. Andalusian chickens may be either black, white, or gray. The gene for black is not dominant over the gene for white, nor is the gene for white dominant over the gene for black.

Equipment and Supplies: Nurses who are aware of location of equipment and supplies do give accurate delivery of patient care without delay and wastage of  time and energy for

What is the purpose of DNA? Actually, DNA makes you who you are. It has all your heredity info, like your hair color, your personality, etc. No two person's DNA is the similar,

NE R V OU S TISSUE The nervous tissue in general develops from the ectoderm of the embryo, but the microgliocytes. It does not have a matrix. The special properti

Your breakfast consists of a cup of black coffee with sugar as well as a plain bagel covered with cream cheese. Describe the digestion of this breakfast as it passes through each m

Relationship of Ecology with Other Disciplines of Biology In order to understand the scope and relevance of ecology let us consider its position in relation to other biological