How does organic matter percentage affect irrigation?

The percentage of organic matter in soil plays a significant role in its water retention capacity, making it essential to consider in irrigation practices. Organic matter, such as decomposed plant and animal materials, improves the soil structure, leading to increased porosity and the ability to hold water. Soils enriched with organic matter can absorb more moisture during rainfall or irrigation events and retain that moisture for longer periods, which benefits plants during dry spells.

Moreover, increased organic matter contributes to the formation of aggregates in the soil, which enhances the overall soil texture and facilitates the movement of water within the soil profile. This property helps maintain a more consistent moisture level, reducing the frequency and volume of irrigation needed, thus promoting water conservation and healthier plant growth.

The other options, while related to soil and water, do not accurately reflect the impact of organic matter on irrigation practices.