Nitrogen fertilizers stimulate leaf growth, but underdeveloped roots cause bad drainage and expand the need for water.
The effect of chemical fertilizers is temporary: without a healthy root system plants will soon need more added nutrients.
A poor root system cannot absorb excess nutrients or hold water. They will be washed into waterways causing algae blooms.
Organic matter will cause root systems to develop better. Organic particles in the soil will create good absorbance and good drainage.
Plants with good roots are more resilient to drought and to pests. The absorption of nutrients by the plant is slower but more even.
Good root development and organic rich soil can hold water and nutrients. It will not be washed away. Waterways stay clean and healthy.