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Name the methods for extracting phosphorous
Phosphorus/phosphate - Phosphorous is estimated as phosphate. Some methods for extracting phosphorous are as follows:
Dyer method : 1% Citric acid used for extracting available soil phosphate .
Bray and Kurtz method : Phosphate is extracted with a solution of 0.03M NH4F in 0.025M HCl and 0.5M NaHCO3 and solution adjusted to pH 8.5 .
Olsen's method : Phosphate is extracted with 0.5M NaHCO3 adjusted to pH 8.5 with 10% caustic soda.
The extracted phosphate develops colour when treated with ammonium molybdate and stannous chloride. The colour intensity is measured with the help of a colorimeter.
What are the major gas exchange organs of the plants? How is the procedure accomplished? In covering of the leaves and of the primary structure of the stem gas exchange is made
what is it
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