Topsoil (793 bytes)
1: ...tain most of their [[nutrient]]s from this layer. Topsoil can be measured as the [[depth]] from the surface...
3: ...he topsoil layer is blown or washed away. Without topsoil, little plant life is possible.
5: ...ety of soil mixtures are sold [[commercial]]ly as topsoil, usually for use in improving [[garden]]s and [[l...

Cover crop (369 bytes)
1: ...s]]. Unused farmland that is left bare can lose [[topsoil]] and nutrients through the effects of [[wind]] a...

Deranged drainage system (522 bytes)
1: ...nadian Shield]]. During the last [[ice age]], the topsoil was scraped off, leaving mostly bare rock. The wa...

Runoff (water) (1778 bytes)
9: ...nto waterways each year, causing loss of valuable topsoil and clogging of valuable waterways.

Lake Tharthar (540 bytes)
1: ...]] also graze in the area. Due to the farming the topsoil is damaged by vehicles and the lake is threatened...

Charles Sherwood Noble (522 bytes)
3: ...ultivator]], or the [[Noble Blade]], that reduces topsoil loss due to wind that results from other means of...

Dust Bowl (1995 bytes)
5: ...t storm removed massive amounts of Great Plains [[topsoil]] in one of the worst such storms of the Dust Bow...

The River (1937 movie) (666 bytes)
1: ..., and how farming and timber practices had caused topsoil to be swept down the river and into the [[Gulf of...

Hardpan (932 bytes)
1: ...r of soil, residing usually below the uppermost [[topsoil]] layer. There are different types of hardpan, al...

Coonawarra (806 bytes)
1: ...fied by a strip of ''terra rossa'' soil (rich red topsoil over porous limestone) approximately 15km long, a...

Broadfork (976 bytes)
1: ...han inverting or mixing them, which preserves the topsoil structure. A broadfork can be used in a [[garden]...

Vinland, Kansas (1090 bytes)
3: ... rolling grassy hills and large maple trees. The topsoil is excellent for a wide variety of crops, includi...

Sustainable design (2967 bytes)
10: ...fewer pesticides and less, or no loss of valuable topsoil or wildlife. Although there are strenuous discus...

Luna 18 (3635 bytes)
52: |''' Radio altimeter :'''|| Density of lunar topsoil
61: ...ter that determined the mean density of the lunar topsoil.

No-till farming (1255 bytes)
3: ...soil and removing plant cover, allowing crucial [[topsoil]] to easily blow away or run off in rainwater. No...

Landscape maintenance (1391 bytes)
1: ...and other jobs for protecting and improving the [[topsoil]], [[plants]], and garden accessories. Groundske...

Gruinard Island (1688 bytes)
5: ...²) of the island, and the worst-contaminated topsoil around the dispersal site being removed. A flock ...

Soil profile (1703 bytes)
7: :B) [[Topsoil]]: well decomposed organic matter, mixed with a s...

Texas Hill Country (1509 bytes)
1: ...ology)|rock]]s and boulders and a thin layer of [[topsoil]] whick makes the region prone to [[flash floodin...

Habitat conservation (2307 bytes)
11: ...stic [[deforestation]], [[erosion]] and loss of [[topsoil]], [[extinction]] and such. Almost no [[terrestr...

<< Prev 20 Result Pages:   1  2  3  4  5  6  7  8  9  10  Next 20 >>