Nutrients in the soil is essential for the growth of plants derived from the origin and decomposition of fallen plants, scrap. Some have come from rain, dirt sediments that rivers bring to the paddle.
Soil nutrients necessary for the growth of plants from soil substrates and decomposition of litter fall. Some have come from rainwater. Sediment washed down to the river.
Soil nutrients necessary for the growth of plants derived from soil parent materials, and the decomposition of litter fall, some come from the rain. Sediment that blow with the river.