Sentence examples for levels of topsoil from inspiring English sources
Infiltration rates were measured using ponded infiltrometers during two years (2014 and 2015) under switchgrass and grain crop management each with two levels of topsoil thickness (0 and 37.5 cm).
You can add a layer of topsoil over the fill".
A layer of topsoil and various forms of vegetation are placed as a final cover.
Without adequate drainage, heavy rain could potentially wash away a whole layer of topsoil.
Determine whether mulch or simply a fine layer of topsoil is required.
The high N urea-BC treatment contained significantly (P < 0.05) higher levels of nitrate in topsoil than the low N urea-BC blend, but both were not significantly different from the straight urea treatment.
After application to unplanted soil columns, the urea-brown coal granules reduced nitrous oxide emission by up to 40%%, reduced mineral nitrogen leaching and maintained higher levels of N in topsoil when compared to conventional urea alone.
The erosion of topsoil, rising sea levels, drought and more extreme weather all show how population levels and climate impinge on one another.
Theoretically, you can lay flagstones directly on the ground (after removing a few inches of topsoil so the stones are level with the surrounding areas), provided the soil has good drainage.
For $3 million, 7,500 tons of topsoil were removed.
