នាម៖
Dominika
គោត្តនាម៖
Krzeminska
A small constructed wetland is a combination of ponds and vegetation filters, designed mainly to remove sediment and nutrients from streams. It is usually located in first and second order streams in agricultural landscapes.
Grassed waterways are shallow channels (natural or constructed) with grass cover, used to drain surface runoff from cropland and prevent erosion.
Reduced tillage, involving no plowing in the autumn, preserves stubble or plant cover during the autumn and winter to prevent soil erosion, and particle and nutrient loss from cropland to watercourses.
