The main aim of this study is to assess the recovery of the forest ecosystem in 15-year-old (midterm) hybrid aspen plantations on a reclaimed oil shale quarry.
Repeated monitoring of the main forest ecosystem components (tree growth, soil properties and understory plant cover) was carried out to describe ecosystem recovery on a reclaimed oil shale quarry.
Reclaimed or reprocessed oils will not be acceptable, nor will any oil which has been blended with processed or reclaimed oil
The new entity will rework and put in to production reclaimed oil
and gas wells, with the first target area being the Eastern Texas.
Illegal refining and subs-standard production of reclaimed oil
Irrational use of reclaimed oil in lubricant production.
Contractors United used the reclaimed oil
as a fuel for its asphalt hot-mix plants.
The present study deals with above- and belowground biomass allocation, as well as with the leaf and root characteristics of young black alder, silver birch and Scots pine plantations on reclaimed oil shale mining areas.
1] calculated for a 20-year-old black alder growing on the reclaimed oil shale mining area .
The objectives of this study were: (i) to describe the early growth of hybrid aspen in two sites on reclaimed oil
shale opencast and compare it with the results from automorphic arable soils in two sites: in the same region with the quarry area and in South-Estonia; (ii) to study relations between tree growth, foliar and soil properties and define the most limiting growth factors for hybrid aspen in reclaimed quarry areas; (iii) to describe and compare the floristic diversity and vegetation structure in plantations established on reclaimed quarry and on abandoned agricultural land.
and 4-yr-old silver birch (Betula pendula Roth) stands on reclaimed oil
shale opencast mining spoil and Calcaric Regosols [21, 22] (Table 1).
Main Characteristics of the Studied Black Alder Plantations Stand Characteristics (Age 21 Years) Plantation Location Site Number of stems per ha Sirgala 59[degrees]17'N Reclaimed oil
shale 2300 27[degrees]44'E mining detritus Parapalu 58[degrees]20'N Abandoned 2788 27[degrees]24'E agricultural land Songa 58[degrees]19'N Forest land 1530 25[degrees]21'E Plantation Mean overbark Mean height diameter H, m at breast height (DBH), cm Sirgala 12.