Online Google Dictionary

topsoil 中文解釋 wordnet sense Collocation Usage Collins Definition
Noun
/ˈtäpˌsoil/,
Font size:

topsoils, plural;
  1. The top layer of soil

  1. the layer of soil on the surface
  2. Topsoil is the upper, outermost layer of soil, usually the top to . It has the highest concentration of organic matter and microorganisms and is where most of the Earth's biological soil activity occurs.
  3. The upper portion of soil that is generally higher in organic matter in comparison to the subsoil and usually has more favorable characteristics of soil fertility, aeration and structure.
  4. The first true layer of soil; layer in which organic material is mixed with mineral particles; thickness ranges from a meter or more under virgin prairie to zero in some deserts.
  5. The surface soil, normally containing organic matter.
  6. The upper part of the soil, which is the most favorable material for plant growth. It is ordinarily rich in organic matter and is used to topdress roadbanks, lawns, and land affected by mining.
  7. uppermost layer of soil, usually darker and richer than the subsoil.
  8. (i) The surface soil horizon (A) which is modified when cultivated, and designated Ap. See also surface soil. (ii) Fertile soil material used to topdress roadbanks, gardens, and lawns.
  9. (A horizon) – Mostly weathered minerals from parent material with a little organic matter added. The horizon that formed at the land surface.
  10. Is the soil above the stony ground. This earth is held in place by the trees. Once the trees are cut down the soil is washed away by rains.
  11. A mixture of particles derived from rock, living organisms, and humus.
  12. The top layer of soil that normally contains the most organic material and nutrients.
  13. is a part of the soil profile, typically the first soil layer (called the A1 horizon) below the ground surface that is darker in colour, more fertile and better structured than underlying layers
  14. The uppermost, normally fertile, layer of soil.
  15. The organic and inorganic matter, naturally present on the surface of the earth, which has been subject to environmental factors, climate, macro-organisms, and topography, which influence growth and regeneration of vegetation on the surface.
  16. The upper-most soil layer that is commonly characterized by dark-colored, organically-enriched materials.
  17. A general term applied to the top natural layer of soil.
  18. Topsoil is a blended product of compost, sand and loam. It is fertile, friable, and free of debris, subsoil and roots, and screened to less than 3/4" diameter.
  19. The topmost layer of soil, usually refers to nutrient-rich soil, but topsoil can be of poor quality.
  20. Fertile top layer in which most plants root; normally approximately one spade’s depth.
  21. The top layer of native soil. This term may also apply to good quality soil.
  22. refers to the layer of soil in which most plant life grows, certainly our veges, herbs and perennials. It varies in depth from between 6 to 12 inches depending on the soil type. This is where the beneficial bacteria live and work.
  23. the top part of the soil
  24. the modern grass level