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
Q. Explain Radiology of the heart? More than a century after its introduction to clinical practice, the chest radiograph (CXR) remains an important diagnostic tool in the routi

filter feeding mode of nutrition is observed in- a) amoeba b) euglena c)paramoecium d) all of the above

What are Flavonols and Flavones? These are the most widely distributed among the flavonoids. The most commonly occurring are Quercetin, Myricetin and Kaempferol. Quercetin is q

Medical Records This includes: health history of patient/client  a report of the findings on examination  signs and symptoms  observation records  progress

Available and Non-available Water You have seen above that water is present even in the apparently dry soils but it is of not much use as far as the plants are concerned. They

T hese are some important uses of biodiversity. 1.   Source of food, medicines and drugs: (a)       Wheat, rice and maize are three carbohydrate rich crops and contribute

Q. What is secondary structure of a protein? The secondary protein structure is creating by the manner its amino acids interact through the intermolecular bond. These communica

Define influence of polyphenols on Carbohydrates? Binding of proteins may indirectly affect carbohydrate absorption. Inhibition of amylolytic enzymes and subsequent reduction o

Left side displacement of abomasum (LDA) E tiology: It occurs commonly in large-sized, high producing adult dairy cows, immediately after parturition. High yielders are

Define Titrimetric Estimation of Carbohydrates? The Fehling's Soxhlet method is the commonly used method for titrimetric estimation of carbohydrates. In the following section y