This reduces plant and soil moisture loss. Use low, spreading shrubs and trees to cover large slopes, rather than shallow-rooted groundcovers. Minimize water runoff with drip irrigation. Vine Sun Drip irrigation Drip irrigation places the right amount of water at the right place at the right time to keep water waste to a minimum. It is the most water-efficient method of irrigation.
Plants differ in their irrigation needs.
Therefore, zone your plants and place plants with different watering requirements on different valves. However, plants may be placed on the same valve with different water amount requirements as long as they have similar frequency and duration requirements. Just add more emitters for plants with more water needs.