When organic matter breaks down in the soil, it releases carbon that fuels plant growth, allows the soil to store more water, and helps hold
soil particles together.
This protein binds
soil particles into crumb - sized clumps, an essential feature of healthy, stable soil.
«A cleansing rain falls; a soil - filled mist arises: Raindrop splash is a surprise source of
fine soil particles in the atmosphere.»
The opposite is true for soils saturated with water, when the pore spaces between particles is filled with water rather than air, since the thermal conductivity of water is about two to three times greater than that of
solid soil particles.
But if winds were to carry
salty soil particles to the ice cap, they might gradually sink to form a briny bed, kept liquid by the planet's warmth.
They found that barley's exudates increased how
well soil particles are bound together, but not as much as corn.
«On the other hand, this increased activity can transform carbon compounds into forms more easily locked
onto soil particles, allowing them to stay in the soil for longer periods of time.»
This is important because chemical reactions between the exudates and
soil particles vary with soil type.
Some studies suggest that adding fertilizers rich in ammonium ions may
cause soil particles to disperse rather than aggregate, thereby offsetting any positive effects of increased soil organic carbon content.
But unexpectedly in this case, «we didn't see improvement in soil aggregate stability even though soil organic carbon concentration increased,» Blanco says, noting that
soil particles usually bind together more strongly in aggregates as soil organic carbon concentrations rise.
Each spring, a cold air mass called the Siberian High swoops down on the Gobi and
hoists soil particles into the atmosphere.
Bacterial Preferences for
Specific Soil Particle Size Fractions Revealed by Community Analyses — Michael Hemkemeyer — Frontiers in Microbiology
This happens when falling raindrops
send soil particles flying, sometimes scattering them toward narrow soil channels called rills, which carry them away.
When water fills spaces
among soil particles, as it does in wet and flooded soils, oxygen is in short supply and methanogens thrive.
The result is better capture of water through improved soil structure — due primarily to the conversion of some of the captured carbon in the decaying roots and leaves into humic acids that
coat soil particles giving greater stability and pore size — hence the ability to accept and retain water.
Lining pots with filter cloth will
stop soil particles from creeping out through drainage holes.
They had assumed that atmospheric water vapor had seeped into high - latitude martian soil and frozen
between soil particles, forming a half - ice, half - soil mixture.
This simply is a consequence of the fact that the thermal conductivity of air is about one hundred times less than that of
solid soil particles.
The frame was built atop a graded surface treated with a sustainable and non-toxic enzyme that
binds soil particles to create a strong substrate for the structure.
Organic matter does this either by «gluing»
soil particles together or creating favorable living conditions for soil microorganisms, which in turn can «glue» soil particles together through production of various organic compounds such as glomalin or by the action of fungal hyphae (Sylvia et al., 2005).
«Roots continuously secrete chemicals into the soil as a way to liberate nutrients that are attached to
soil particles,» says Hallett.
The rover had taken in fine
soil particles, heated them, and passed the gases that the heating drove off through its mass spectrometer, which can separate and identify the gases by molecular weight.
According to James Hartsig, a soil scientist with Duraroot Environmental Consulting,
soil particles are either sand, silt, or clay.
The lack of moisture means that minerals are trapped inside
the soil particles.
These bubbles rise to the surface and burst through that layer of organic material, catapulting
the soil particles into the air.
«We expect that mobile microorganisms can transport PAHs in the stagnant water around and between
soil particles and in water - filled pores.
Until now PAHs were considered minimally mobile in soil because they bind to
soil particles and only small amounts of PAH can be dissolved in water.
Soil structure, the arrangement of
soil particles and the pore spaces between them, helps determine if a soil will hold carbon for decades or release it quickly.
It binds to
soil particles and takes years to evaporate into the air.
But separate research by Swedish scientists suggests that
the soil particles are quickly converted to heat - trapping CO2 when they are swept into the sea.
The haze is comprised mainly of
soil particles, stripped by wind erosion from the barren ground over the Sahara and Sahel.
Avoiding compacting of the soil: water is stored in the voids between
soil particles, compact the soil with trampling and the rain will increasingly runoff.
Organic matter does this either by «gluing»
soil particles together or creating favorable living conditions for soil microorganisms, which in turn can «glue» soil particles together through production of various organic compounds such as glomalin or by the action of fungal hyphae (Sylvia et al., 2005).
Groundwater doesn't slosh around in underground lakes but rather is stored in the spaces between
soil particles.
But separate research by Swedish scientists suggests that
the soil particles are quickly converted to heat - trapping CO2 when they are swept into the sea.
The 2 — 3 billion tons of fine
soil particles that leave Africa each year in dust storms are slowly draining the continent of its fertility and hence its biological productivity.
The 2 to 3 billion tons of fine
soil particles that leave Africa each year in dust storms are slowly draining the continent of its fertility and, hence, its biological productivity.