Question

.......... are a factor in the higher yields of high-cost farming.

Answer 1

Fertilisers, chemically synthesized substances which are rich in plant nutrients such as NPK. Fertilizers are a factor in the higher yields of high-cost farming. Fertilizer is used to ensure good vegetative growth (leaves, branches and flowers), giving rise to healthy plants. They are artificially made but have a rapid response. Overuse of fertilisers can cause negative effects like loose soil fertility.