Help save the soil you wonder? Are we not in drought? Should we not be saving water instead?
I wondered these same questions until I listened to Dr. Stephen Andrews, a soil scientist and professor at U.C. Berkeley. Stating the fact that California is now the driest since 1580 was enough to scare everyone in the room. California depends on water from snowmelt in the Sierra Nevada that slowly melts over the summer months. The snowpack gets replenished during the winter. Without a reliable winter to bring moisture, there is more at stake than just a lack of water.
Another fact – Just 1 teaspoon of forest soil can contain 10 billion bacteria! Wow! And of the 10 billion, we hardly know anything about them.
Another fact – California has 15.5% of rare soil types and 104 of endangered soils in the USA.
The loss of a soil series is a bigger problem than losing an endangered animal. As Dr. Andrews explained – when you lose a soil, you lose the entire community of organisms supported by it. There is so much we do not know about the ground beneath our feet, that we are not even aware of what we are losing. To further open our minds, Dr. Andrews pointed out the Clean Air Act protects the air, the Clean Water Act protects the water, but there is no Clean Soil Act – very astonishing considering the soil is what we depend on for our food.
So what can the average person do?
1. Lose the Lawn
Ask yourself ‘What is your lawn doing for you?’ There are plenty of low-water lawns to choose from now, check out ‘No Mow Fescue’ or a Delta bluegrass blend.
2. Water Deeply
Two-thirds of a plant’s biomass is underground so getting water to the roots is vital. A deep watering accommodates plants as they grow over time. Water emitters need to be moved as the plant grows to encourage proper root development. If you have a tiny emitter right at the base of tree and never move it, the roots will have no reason to grow further and anchor the tree.
Move emitters further from the plant as it grows to encourage root growth. Photo by Shelagh Fritz
3. Upgrade your Irrigation System
New systems have many programs that you can set, including ‘wet weather sensors’. Be sure to group plants with similar water needs.
4. Capture Every Drop
Keep every drop in your yard, make it your goal to not send any runoff to the street. Capture, re-use and filter your water. Create a water garden, install a water catchment or consider using your grey water to water landscape plants. Be sure to use bio-degradable soap and alternate the landscape plants you are watering. On average 14 000 gallons of water falls onto a rooftop during the rainy season – this stored water could be a source of water during a fire or for an earthquake. The water tanks alongside a house can help moderate the temperature of the home as well – keeping it cooler in the summer and warmer during the winter.
5. Plant Water Wise Plants
The Bay Friendly Coalition provides a list of recommended plants for the Bay Area. Most nurseries will be able to help you choose wisely. Another tip – purchase smaller sized container plants – 1 gallon instead of 5 gallons, 4″ pot instead of 1 gallon. The smaller sized plants will require less water to get established and be under less stress.
6. Skip the Fertilizing
Fertilizing encourages plants to grow – but this new growth needs water. Feed your plants with compost. The nutrients will become available as the compost breaks down naturally.
7. Compost, compost, compost!
Use compost instead of fertilizer. Fertilizer contains salt, which is harmful to soil bacteria and burns plant’s roots. When the soil bacteria is stressed, disease has a chance to settle in. Compost is natural and will decompose over time.
Mulch is a permanent cover over the soil and can be done in layers to conserve moisture in the soil. The mulch controls weeds and moderates the soil temperatures so the plants’ roots and the soil bacteria have a happier home.
Below is a diagram of what a mulch layer looks like. The larger particles in the top layers will decompose as a new layer is added each year, thereby becoming the layering underneath.
Mulch layer to conserve soil moisture and to moderate soil temperatures.