The phrase "available phosphorous" is correct and usable in written English.
It can be used in contexts related to chemistry, agriculture, or environmental science, where the availability of phosphorous is being discussed.
Example: "The soil test revealed that there is a significant amount of available phosphorous, which is essential for plant growth."
Alternatives: "accessible phosphorous" or "readily available phosphorous".
Available phosphorous (P) and total potassium (TK) values declined in CH.
The determination of available phosphorous was carried out following the Olsen extraction method (Olsen et al. 1954).
Results of ANCOVA revealed that vegetation types indicating high nutrient levels showed significantly higher contents of plant available phosphorous and younger grassland age.
Available phosphorous (Av.P) was determined following Bray-II method where solutions of 0.1 N HCl and 0.03 N NH4F were used to extract available phosphorus from the soil samples.
In acid sulfate soils, low available phosphorous resulted because of low solubility in acid reaction, insolubilization or fixation by Fe, Al and Mn and low release from organic matter.
Available and total phosphorous, nitrogen, sulfur, as well as carbon make the compost good for use as a mineral fertilizer (Soumare et al. 2003).
One of the methods for making insoluble phosphorous available to the plants is solubilisation through microorganisms (Arcand and Schneider 2006; Reyes et al. 2006; Swain et al. 2012).
Generally mine soil is characterized with high stone content, lesser soil forming materials, low water holding capacity, low soil organic matter and humus, lower plant available nitrogen and phosphorous (Maiti 2013).
However, this point has been raised by Jouquet et al. (2010) pertaining to availability of phosphorous contents by the implementation of many living to non-living approaches on available organic source pool.
Total Kjeldahl nitrogen (TKN) was analysed using the Kjeldahl method, ammoniacal nitrogen (NH4-N) using KCl extraction, total phosphorous (TP) and available phosphorus (AP) (by acid digest) using the stannous chloride method.
