But while stuck, Spirit had a breakthrough: it found soil rich in sulfates, which are a component of steam.
Behind him, the twisting green vines stretch out into the distance, their leaves tinged with gauzy mid-afternoon light, their stems rising up from a rich ochre-red soil.
Over a two-year experiment, we saw that there was a change in the soil structure as a result of a wetting and drying of the soil in clay-rich soils, and that can increase the amount of structure and hence storage of water.
Within the past three decades, vintners have planted grapes on hills around the area, taking advantage of rich soil, a suitable microclimate and southern-facing slopes.
BBC: Travel - The tragic story behind Canada��s newest World Heritage Site
That means building futuristic structures that use wastewater and solar power to produce hydroponic (grown in a nutrient-rich water, without soil) and aeroponic (grown in water-saturated air) crops.
Europe is finally, and at times grudgingly, embracing the tax cuts, privatization and deregulation that feed the rich soil needed to create a vibrant industry.
Now it's a virtual jungle which settled spontaneously and grew rapidly in the rich soil.
The Delta may be as flat as a pancake, but its musical history is as rich as the soil itself.
The entire village is washed in rich sunburnt shades of ochre, (a natural dye taken from the local soil, no other color is allowed for buildings).
Experts have estimated that the moon is a rich depository of the isotope with possible reserves that stretch meters down into the lunar soil that have been carried there by solar winds.
And David Laird, of America's Department of Agriculture, showed that biochar even helped the rich soil of America's Midwest by reducing the leaching from it of a number of nutrients, including nitrate, phosphate and potassium.
ECONOMIST: Biochar could enrich soils and cut greenhouse gases as well
应用推荐