Desert soils tend to be low in organic matter, and high in alkaline and salts. Here are ways to improve desert soils for vegetable gardens.
Almost all soils in the desert regions of North America (and elsewhere, for that matter) tend to be high in salt and alkaline, low in organic matter and fertility.
Organic Matter
Adding organic matter (compost, animal manure, green manure) greatly improves soil structure, adds nutrients to the soil, increases it’s water-holding capacity, and allows the soil to hold on to added nutrients long enough for the plants to take them in.
Livestock manure
Although high in salts (especially cattle manure), livestock manure is probably the easiest way to quickly add organic material to your soil. It already has active bacteria in it that will enhance nutrient breakdown, and that’s good for vegetables.
However, only apply fresh manure in the fall. That way, it will have time to break down in the soil.
Manure that has already been composted, or heat-treated manure can be laid down and mixed into the soil prior to planting in the spring. Additionally, the composting process will kill any weed seeds that may be present in fresh manure. Fresh manure, if applied in the spring, usually burns young plants.
Green manure
Green manure is any plant that can be grown and incorporated back into the soil as organic matter. Winter wheat, barley, oats, rye are some examples of green manure. If you want a green manure crop next winter, buy the seeds from any local farm feed store and scatter them around your garden in late summer or early fall. Simply rake the seeds into the ground around whatever vegetables are still around. The seed will sprout and start to grow. At first frost next fall, pull out frost damaged vegetable plants and leave the green carpet there. It will develop fully in late fall. Give it a little taste of nitrogen fertilizer in early spring, then till or turn the green manure into the soil about a month before your plan to plant your garden.
Compost
Another really easy method of adding organic matter to your soil is putting down compost. Compost is usually made from leaves, grass clippings, food wastes, and garden vegetable waste (damaged fruits, old plants). Add one to two inches of well-decomposed compost over your soil and then till it in.
Many desert soils are highly alkaline. Alkalinity tends to inhibit plants’ intake of necessary nutrients from the soil (phosphorous, iron, zinc). Compost helps make those nutrients available.
Related articles:
- Desert Vegetable Gardens
- Planning A Desert Vegetable Garden
- Desert Climates and Vegetable Gardens
- Fertilizing A Desert Vegetable Garden
- Planting A Desert Vegetable Garden
- Proper Watering of Desert Vegetable Gardens
- Pests in a Desert Vegetable Garden
