Assignments:

1. Write the balanced equation for the preparation of  ÃƒÂ¢Ã¢â€šÂ¬Ã…“Dickman and Bray’s Reagent”.



2. Discuss about the method of detemination of available phosphorus in the soil by Bray’s method.



3. How is NH₄⁺ held in the soil, and how can it be extracted?



4.  Discuss about the various methods for the estimation of phosphorus in the soil.



5. Compare between the Bray-Kurtz P1 and Mehlich-3 Tests for the estimation of phosphorus.