Landscaping A House On A Hill
This slope isn't so extreme that it has to have retaining walls and terracing. However, it would help in regards to saturation and runoff from sprinkler irrigation. At the very least, your watering method would need to be adjusted for watering a lawn on a slope or hillside.
Deep saturation helps create deep root systems which makes for healthier lawns and plants. And a well established root system will actually need less water and be helpful in dry and drought situations. Generally though, on slopes like these, it takes some adjusting to your water schedule. You'll notice many yards and landscapes like this will be the first to show distress in drought and dry situations.
| 
