What word describes how well soil supports plant growth?

The word that describes how well soil supports plant growth is fertility.

Here's why:

* Fertility refers to the soil's ability to provide the necessary nutrients, water, and physical conditions for plants to thrive. It encompasses factors like:

* Nutrient content: Presence of essential nutrients like nitrogen, phosphorus, and potassium.

* Water holding capacity: Ability to retain water for plant use.

* Drainage: Allowing excess water to drain away to prevent root rot.

* Structure: Properly aggregated soil with air spaces for root growth.

* pH: A suitable acidity or alkalinity level for plant roots.

Other words might be used depending on the specific aspect of plant growth you're interested in:

* Productivity: Refers to the overall yield or biomass production from the soil.

* Vigor: Describes the health and growth rate of plants.

* Nutrient availability: How readily plants can access nutrients from the soil.