mineral layer

These activities transport nutrients into the mineral layers of soil.

Cutting them in two revealed mineral layers not unlike tree rings.

But since naturally soft water usually has not been neutralized by passing through mineral layers in the ground, it can be quite corrosive.

It turned out that the teeth were from species long extinct, suggesting that the mineral layers built up over many millions of years.

They were looking at mineral layers that were covering the images, and tracing the amount of radioactive uranium in them.

Deep mineral layers under the soil prevented scanners from discovering the unbelievably pure deposits.

They tested out a variety of solutions, with the goal of finding one that removed the mineral layer without harming the silk.

A more recent discovery of a hard mineral layer perched within the peat soils of many islands, though, called for a new interpretation.

For the geologically disinclined, hematite is a type of mineral layer found in some fascinating geological areas - interesting huh?

Strongly acidic soils often have poor incorporation of the organic surface layer with the underlying mineral layer.

The volcano had awoke, and the vapor had penetrated the mineral layer heaped at the bottom of the crater.

The inner five are geologic strata, under which are five mineral layers, and beneath that, seven metallic ones.

"Look at this patch," say Gorres, "there's this leaf layer and then we're straight into the top mineral layer."

Total and fine root biomass in both the forest floor and also the upper mineral layer was linearly related to thickness of the organic horizon.

In some cases fungi were found to produce secondary minerals or their hyphae were covered with partially etched mineral layers.

Newer mineral layers from the Triassic are found only in sporadic deposits and discontinuous layers within town limits.

Owing to uplift in the Jurassic and Cretaceous, there are no mineral layers from these geological time periods.

On the other hand, broadleaf trees such as māhoe derive a good fraction of their nutrition in the deeper mineral layer of the soil.

Tang's team was inspired by the simplicity of eggshells; how a single cell was protected by a thin mineral layer.

A dense and homogeneous organic layer is loosely attached to the upper periostracum and the inner mineral layer.

Researchers from England and Kenya have discovered a way to remove the mineral layer that coats the cocoons of wild silkworms using an acidic solution.

Ash contents were high, and up to nine different mineral layers consisting of tephra, sand, silt, and clay were detected.

The increased plant growth and deeper thaw, meanwhile, also may have enabled increased carbon availability in the deeper mineral layer that overlies the permafrost.

Because soil organic matter accumulates in the upper layer, most gelisols are black or dark brown in soil color, followed by a shallow mineral layer.

During the Upper Permian 240 million years ago, mineral layers created in the Castile Formation show cycles of 2,500 years.