By contour planting and contour ploughing, the speed of h2o runoff and therefore soil erosion is usually considerably decreased; this is especially significant in riparian zones. আমরা সারা বাংলাদেশে আমাদের সার্ভিস প্রদান করে থাকি। The horizontal length in between any two consecutive contours is recognized as horizontal equal. It is https://contour-survey27160.blogrenanda.com/38477353/5-simple-techniques-for-contour-survey-in-dhaka