In modern vertical indoor farms, environmental factors are tightly regulated to maximize the rate of photosynthesis and crop growth.
Explain how the following practices in an indoor vertical farm increase the dry biomass of the crop:
Enriching the atmosphere with carbon dioxide (CO2\text{CO}_2CO2) during the photoperiod.
Supplying a liquid nutrient solution containing a high concentration of nitrate ions.
Growers in vertical farms must also manage insect pests that enter the facility.
Describe one example of using biological control to manage a named crop pest.
State three advantages of biological control compared to using chemical pesticides.
74 exam-style questions on Edexcel IGCSE Biology Food production. Each one has a worked solution and a mark scheme showing where the marks go.