Amaya is thinking of applying a couple of inches of bark mulch to the soil surface. She says it will keep more water in the soil by lowering the transpiration rate. Is she right? a No - most water loss is through evaporation and mulch will not affect evaporation. b No - most water loss is due to retention of water in the plants, and mulch will not affect that. c Yes - most water loss is through transpiration and mulch will lower the trasnpiration rate. d No - although most water loss is through transpiration, mulching will not affect the rate of transpiration.