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CONTENT: Classification of crops based on crop plant forms
(aii) Monocotyledonous e.g maize, guinea corn.
Dicotyledonous e.g beans, melon.
Sub Topic 1: Classification of crops based on crop plant forms
A crop is any plant that have useful purpose or economic value.
Crop plants are grouped into two forms based on the structure of their seeds or the number of seed leaf it contains. Seed leaf is otherwise known as cotyledon.
Food for germinating seed is stored in the cotyledon.
Monocotyledons plants
These are plants with one seed leaf or cotyledons e.g. oil palm, coconut, banana, plantain, pineapple, date-palm, garlic, sugar-cane, cereals e.g wheat, millet, rice, maize, sorghum, rye, barley, oats and all grasses e.g guinea grass, carpet grass etc.
Characteristics of monocotyledons plants
Dicotyledonous plants
These are plants with two seed leaves or cotyledons. They include most trees e.g. kola, cocoa, cashew, orange, mango, guava, pawpaw, silk cotton, Iroko, most vegetables e.g tomato, okro, melon, pepper, roots and tubers e.g cassava, sweet potato, yam etc and legumes such as soya-beans, cowpea, groundnuts, pigeon pea, etc.
Characteristics of dicotyledons plants
Sub-Topic 2: Difference between monocotyledons & dicotyledons
Structure | Monocot Features | Dicot Features | |
1 | Root | i. Fibrous root system. | Tap root system. |
2 | Stem | ii. Single erect stem without branches. iii. Scattered vascular bundles. | Stem with many branches Vascular bundles in ring form. |
3 | Seeds | iv. One seed leaf or cotyledon v. Exhibits hypogeal germination | Two seed leaves or cotyledons. Exhibits epigeal germination |
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