Water entering the soil is more useful than water running across it. In an NCAT webinar, sustainable-agriculture specialist Felicia Bell explains how cover crops and managed grazing can help build the structure that allows rainfall to infiltrate.
Roots create pathways
Living roots release carbon compounds that feed fungi and bacteria. Those organisms help bind particles into stable aggregates, leaving pores for air and water. Roots also create channels that remain after they die. Above ground, leaves and residue soften raindrop impact and slow surface flow.
The result depends on starting condition and management. Severe compaction, low cover or very intense rainfall can still overwhelm infiltration. A cover crop that establishes poorly contributes little, while one allowed to grow longer generally produces more root and residue.
Grazing can add value or remove protection
Livestock can turn cover crops into feed and return nutrients through manure. Timing and stock density matter: trampling and grazing may stimulate residue contact and nutrient cycling, but wet-soil traffic or excessive removal can compact soil and leave it exposed.
Simple tests help farmers see progress. A ring infiltration test, rainfall simulator, spade inspection and photographs taken under similar moisture conditions can reveal differences between treatments. Yield and grazing records connect those physical changes with business value.
The practical approach is to select a cover for the climate and rotation, decide how much biomass must remain, and manage livestock around soil condition. Water infiltration improves through repeated protection and rooting, not from the seed mix name alone.
Watch NCAT’s Soil Health 101 webinar on cover crops and water infiltration.