A) The method I would advise Sarah and Yussuf to use for applying inorganic fertilisers is side-dressing.

a) The method I would advise Sarah and Yussuf to use for applying inorganic fertilisers is side-dressing.
This method involves placing the fertiliser in a band along the side of the plant rows, close to the root zone. This ensures that the nutrients are readily available to the plants and minimizes waste.

b) The advantages of the side-dressing method include:

• Efficient nutrient uptake: Nutrients are placed directly where the plant roots can absorb them, leading to better growth.
• Reduced fertiliser waste: Less fertiliser is lost due to leaching or runoff compared to broadcasting.
• Minimized weed growth: Fertiliser is not applied to the entire field, which reduces nutrient availability for weeds between rows.
• Reduced risk of plant damage: Direct contact with plant foliage is avoided, preventing potential burning.