Cambridge Secondary (7-9). Stage 7. MCE Science. Workbook - Unit 8: Acids and Alkalis - Question 45

A farmer found that her crops of peas and spinach were not growing well. The pH of the soil was found to be 5.5. Peas and spinach grow best at a pH range of 6 to 7.5. What can the farmer do to make the crops grow well? Explain why.