a) i) State three (3) differences between macro nutrients and micro nutrients as used in crop production. 6. a) ii) Give one (1) example each of macro nutrient and micro nutrient. 6. b) i) State three

You're on a roll — here are the answers to questions 6 and 7. 6. a) i) State three (3) differences between macro nutrients and micro nutrients as used in crop production. Quantity Required: Macronutrients are required by plants in relatively large quantities, while micronutrients are needed in smaller quantities*. Role in Plant Growth: Macronutrients contribute significantly to the bulk and structural components of the plant, whereas micronutrients primarily function as cofactors for enzymes* and in metabolic processes. Examples: Macronutrients include Nitrogen (N), Phosphorus (P), Potassium (K), Calcium (Ca), Magnesium (Mg), and Sulfur (S). Micronutrients include Iron (Fe), Manganese (Mn), Zinc (Zn), Copper (Cu), Boron (B), Molybdenum (Mo), and Chlorine (Cl). 6. a) ii) Give one (1) example each of macro nutrient and micro nutrient. Macronutrient example: Nitrogen (N)* Micronutrient example: Iron (Fe)* 6. b) i) State three (3) reasons why alloys are preferred to pure metals. Increased Strength/Hardness: Alloys are generally stronger and harder* than their constituent pure metals, making them more suitable for structural applications. Corrosion Resistance: Many alloys exhibit greater resistance to corrosion* compared to pure metals, extending their lifespan and utility. Improved Properties: Alloys can be engineered to have enhanced specific properties* such as ductility, malleability, electrical conductivity, or a lower melting point, which are beneficial for various applications. 6. b) ii) Differentiate rusting from corrosion. Corrosion* is the general term for the degradation of a material, usually a metal, due to chemical reactions with its environment. It can occur in various materials and environments. Rusting is a specific type of corrosion that applies exclusively to iron and its alloys* (like steel). It is the process where iron reacts with oxygen and water to form hydrated iron(III) oxides, commonly known as rust. 6. c) Explain the following terms as used in seed germination i) Hypogeal germination: This is a type of seed germination where the cotyledons remain below the soil surface*. The epicotyl elongates, pushing the plumule above ground, while the hypocotyl remains short. ii) Epigeal germination: This is a type of seed germination where the cotyledons are pushed above the soil surface* by the elongation of the hypocotyl. The cotyledons then turn green and function as photosynthetic leaves for a short period before true leaves develop. 6. d) Write the ionic forms of the following elements i) Sodium (Na): Na^+ ii) Calcium (Ca): Ca^2+ iii) Aluminium (Al): Al^3+ iv) Oxygen (O): O^2- v) Magnesium (Mg): Mg^2+ 7. a) State two (2) uses of each of the following i) Metals: Construction:* Used in buildings, bridges, and vehicles (e.g., steel, aluminum). Electrical Wiring:* Used for conducting electricity (e.g., copper, aluminum). ii) Non-metals: Fuel:* Used as energy sources (e.g., carbon in coal, hydrogen). Fertilizers:* Essential components in plant nutrients (e.g., nitrogen, phosphorus). 7. b) State four (4) ways of controlling mosquitoes in the community. Eliminate breeding sites:* Remove stagnant water from containers, gutters, and old tires. Use mosquito nets:* Sleep under insecticide-treated bed nets. Apply repellents:* Use mosquito repellents on skin and clothing. Spray insecticides:* Conduct targeted spraying of larvicides in breeding areas or adulticides to kill flying mosquitoes. 7. c) Give four (4) measures that can be taken to minimize the negative impact of mineral extraction on the Ghanaian environment. Reclamation and Rehabilitation:* Implement mandatory programs to restore mined-out areas to their original or an improved state. Strict Environmental Regulations:* Enforce stringent laws and regulations regarding waste disposal, water pollution, and air emissions from mining operations. Use of Sustainable Technologies:* Promote and adopt environmentally friendly mining methods and technologies that reduce ecological footprints. Community Engagement and Benefit Sharing:* Ensure local communities are involved in decision-making and benefit from mining activities, fostering responsible practices. 7. d) State four (4) importance of cover cropping in crop production. Soil Erosion Control:* Cover crops protect the soil surface from wind and water erosion. Weed Suppression:* They outcompete weeds for light, water, and nutrients, reducing weed growth. Soil Fertility Improvement:* Leguminous cover crops fix atmospheric nitrogen, enriching the soil, and all cover crops add organic matter when incorporated. Improved Soil Structure:* Their root systems help to improve soil aggregation, water infiltration, and aeration. Got more? Send 'em 📸