Answer to Question #80858 in General Chemistry for patrick phiri

Question

4. A soil analysis shows a CEC of 25.9 meq/100g of soil and 2900 ppm of Ca²⁺, 200 ppm of Mg²⁺, 200 ppm of K⁺ and 64 ppm Na⁺; also a pH 6.5. Bulk density 1.1g/cm³, depth of 20cm. Which element must be reinforced and which may need to be restricted to maintain a good balance of bases?


a) Mention which cations should be increased and which elements should be reduced in In order to get a good balance of cations on the CEC

b) Which Calcium source between Gypsum (CaSO₄.2H₂O) or Lime (CaCO₃) should be used to increase the percentage of Ca²⁺?

c) Calculate the amount of Calcium source from Question (b) that will be required to get 75% of Ca²⁺ on the CEC? Final Answer in Kg/ha

d) Calculate the necessary amount of the K₂O that will be required to achieve 2% K⁺? Final Answer in Kg/ha