Theory question 103
Plant Forms and Crop Classification(a) Using the table below, classify the following crops based on their life cycle: Mango, Rice, Groundnut, Cotton, Pepper, Soya bean, Oil palm, Yam, Tomato, Rubber, Ginger, Cocoa, Cowpea, Carrot.
(b) List four components of a typical soil with their percentage volume. (Soil component — Percentage volume: (i) to (iv))
(c) State three methods of applying inorganic fertilizers to the soil.
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(a) Annuals: rice, groundnut, soya bean, tomato, cowpea, (yam and ginger are grown as annuals). Biennials: carrot (also pepper grown as biennial; cotton sometimes). Perennials: mango, oil palm, rubber, cocoa. Accept pepper and cotton as annual/biennial, yam and ginger as annuals.
(b) Mineral matter about 45%; organic matter about 5%; soil water about 25%; soil air about 25%.
(c) Any three: broadcasting; side/band placement; ring application; foliar spraying; fertigation; drilling/placement in holes.
Put each crop under annual, biennial or perennial.