Neco Model Questions Vol1 2017 English Language Question 30

Read the passage below and answer the question that follows. "Olumide had always relied on the old ways of farming - hand‑planted seeds, rain‑dependent irrigation, and manual weeding. Last season, a severe drought threatened his harvest, and the yields fell dramatically. Determined to change his fate, Olumide invested in a solar‑powered irrigation system and a mobile app that gave real‑time weather forecasts. Within weeks, his fields stayed moist despite the dry spell, and the app warned him of an approaching storm, allowing him to protect his crops. By the end of the season, his produce had not only recovered but exceeded his neighbours' yields, turning the tide for his family's livelihood. What does the expression "turning the tide" imply in paragraph 3?