Keeping high levels of organic matter in the garden is the most important step.

They pay particular attention to the protection of organic matter in the soil.

There should be between 3% and 8% of organic matter in the soil.

This branch is black with the organic matter picked up by the river.

Measured by the standards of organic matter, we are powerful enough.

The majority of the nest is created with organic matter.

The mud turned out to be high in organic matter.

It tells you just about how much organic matter is present.

Now is a good time to get out there and add some organic matter.

Over time, organic matter is changed into natural gas through decay, heat and pressure.