Explanation

(a) Full meaning of acronyms of non-governmental agricultural organizations

• WARDA - West African Rice Development Agency/Association
• IITA - International Institute for Tropical Agriculture
• FAO - Food and Agriculture Organization
• ILCA - International Livestock Centre for Africa        

(b)  Ways in which Agriculture is of benefit to rural communities

• Provision of food
• Provision of medicinal herbs
• Creation of market for local/industrial goods
• Provision of materials for shelter
• Provision of employment
• Provision of means of transportation/beast of burden/work animal
• Provision of income/revenue for farmers
• Provision of raw materials for cottage industries           

(c) Liming materials used in Agriculture

• Quick lime (CaO) - Calcite (CaCO3)
• Limestone (CaCO3) - Chalk (CaCO3)
• Slaked lime (Ca(OH)2) - Dolomite (CaMg(CO3)2)
• Calcium bicarbonate (Ca(HCO3)2) - Gypsum CaSO4.2H2O
• Basic slag Ca(OHSiO3)2 - Wood ash Ca(PO4)2SiO4
• Bone meal/calcium phosphate (CaPO4)

(d) Examples of sedimentary rocks

• Peat
• Conglomerate
• Lignite
• Common salt
• Gypsum
• Dolomite
• Limestone
• Flint
• Coal
• Sandstone
• Breccia
• Clay
• Shale
• Mudstone
• Chalk

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