The objectives were: (1) to quantify C stock under the land-cover types, (2) to test the hypothesis that the effect of vegetation on C stock in these soils is limited to the topsoil, and (3) to compare the trend of cover-induced variations and the effect of soil structure on C stock in both soil layers.
Sampling was from the topsoil (0-30 cm) and subsoil (30-60 cm) layers, in line with the current standard depth of 30cm recommended for C accounting purposes (McKenzie et al.
Grades can be adjusted to required elevations prior to respreading topsoil.
Topsoil from the stockpile is removed and spread over the site to the required depths.
Following application of triazine pesticides to the plots, field samples (topsoil
and subsoil) collected at 1-3-monthly intervals over 2 years were analysed in the laboratory for atrazine mineralisation activity and numbers of atrazine degraders.
Quantification of the effects of topsoil
loss on productivity is an essential component in the development of soil conservation and watershed management practices.
Restoring badly damaged topsoil
may require more resources than some nations can muster, says Speth.
In the sampled dunes south of the Lachlan River (sites MG, RB, MB), the topsoils
vary somewhat in particle size distribution, with MG dominated by fine sand, MB containing appreciable clay, and RB containing a blend of these materials (Fig.
The experimental treatments consisted of four depths of topsoil
removal (0, 6, 12, and 18 cm) (0, 2, 5, and 7 in) and six rates of fertilizer N (0, 40, 80, 120, 160, and 200 mg/kg) applied as N|H.sub.4~N|O.sub.3~.
1999), the effect of topsoil
incorporated lime, fluidised bed boiler ash (FBA), and flue gas desulfurisation gypsum (FGDG) on the amelioration of soil acidity of an Allophanic soil and an Ultic soil was investigated.
In the sodic topsoils
(Kyabram sodic topsoil
, Two Wells topsoil
), which suffered the most substantial losses of C, the net losses were attributable largely to carbohydrate, N-alkyl, and alkyl C.
You can make new garden beds quickly with no digging or tilling by using bags of topsoil
as shown here.