Regional probiotic soil improvement should perhaps rank high on any polar cities priority list.

The tree itself is very useful for nitrogen fixing, erosion control, soil improvement, and watershed regulation.

They involve planned attempts at soil improvement, water conservation, electric power, roads, and "green belt" building.

He lent out parts of the farm to various researchers so that they could learn about crop rotation, soil improvement, and cost-cutting methods.

He found no evidence for soil improvement but the increased trampling had led to soil compaction.

Although completion of the circuit was due July 2010, excessive rainfall caused delays in soil improvement.

The entire plant is known for soil improvement because of nitrogen fixation.

Using locally available organic amendments for soil improvement and pest control.

These are probably the stars for soil improvement and making finer compost.

This soil improvement also aided growth of the most spectacular flower in the garden, a small yellow lady's slipper.