They were genetically altered to grow faster, along with other tweaks. The farms would be built alongside tracks, so the farmers could dump their crops onto the track to decimate oncoming Bloons. Path 1 Upgrades: Increased Production; Acidic Soil; Cryo Shells; Pineapple Hailstorm Increased Production:The farmers are given more seeds, workers, land, and pay to produce more pineapples for the war effort. Acidic Soil:The farmers are given acidic soil to fertilize their pineapples. This creates a higher acid level in the pineapple juices, resulting in a bigger explosion.