(a)(i) State six uses of lime in Agriculture (ii) List four common liming materials (b) State (i) Three examples of nitrogenous fertilizer: (ii) three examples of a phosphorous fertilizer
Explanation
(a)(i) Uses of lime in agriculture: (i) It is applied to the soil to neutralize soil acidity. (ii) improves soil structure. ii) releases calcium ions (Ca ++) to plants for tissue development. (iv) increases rate of water percolation in clay soil. (v) reduces the toxicity of dissolved copper and mangenese in the soil. (vi) serves as additional source of calcium for one development in fish. (vii) reduces turgidity in fish ponds through flocculation property. (viii) enhances the release f some nutrient elements e.g. phosphorus. (a)(ii) Liming materials are: (i) limestone / CaCo3/ Calcium trioxo ,arbonate (IV) (ii) quicklime / Ca 0 / Calcium oxide. (iii) slaked lime / Ca (OH)2/ Calcium hydroxide. (iv) basic slag/ (OHSiO3)2 Calcium trioxo silicate (IV) (v) dolomite or calcite / CaCo3 Mg Co3/ Calcium trioxo carbonate IV/ Aagnesium trioxo carbonate (IV) or, Chemically combined calcium carbonate and magnesium carbonate. (vi) calcium bi-carbonate / Ca (HCO3)2 / Calcium hydrogen trioxo carbonate (IV) (vii) gypsum / CaSO4 . 2H20 / Calcium tetraoxo sulphate (VI) ( hydrated). (viii) Wood ash / Ca4 (PO4)2 SiO4 / Calcium phosphosilicate. (b) Examples of (i) Nitrogenous Fertilizers are : (i) Ammonium sulphate / Sulphate of ammonia. (ii) Urea. (iii) Potassium nitrate. (iv) Anhydrous ammonia. (v) Ammonia liquor. (vi) Calcium ammonium nitrate. (vii) Diammonium Phosphate. (b)(ii) Phosphorus Fertilizers (i) Single superphosphate. (ii) Iripple superphosphate. (iii) Rock phosphate. (iv) Basic slag (Ca,OH PO4) / Calcium hydroxyl Carbonate. (v) Dicalcium phosphate. (vi) Guano (Poultry / Bird droppings) (viii) Diammonium phosphate.
