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2009-01-30_GENERAL DOCUMENTS - C1980005
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2009-01-30_GENERAL DOCUMENTS - C1980005
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Last modified
8/24/2016 3:43:16 PM
Creation date
2/13/2009 3:11:03 PM
Metadata
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Template:
DRMS Permit Index
Permit No
C1980005
IBM Index Class Name
GENERAL DOCUMENTS
Doc Date
1/30/2009
Doc Name
Nomination for 2009 Excellence in Surface Coal Mining National Reclamation Award
From
Seneca Coal Company
Permit Index Doc Type
General Correspondence
Email Name
SB1
Media Type
D
Archive
No
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the vegetative competition consisted of annual herbs, perennial grasses, and weed species. Weed <br />present were primarily various thistle species. Shading was not a factor, since the trees were <br />larger and growing above the competing vegetation canopy. The soil moisture data suggest <br />competition between surface vegetation and trees for a limited amount of available water. <br />CONCLUSIONS <br />Irrigation: <br />Best growth and survival was with low or no irrigation, but salinity of irrigation water in the first <br />two years of the experiment reduced growth of trees receiving high and medium amounts of <br />irrigation. Reclaimed soils were not saline, but salinity levels were high enough in irrigation <br />water from local ponds to reduce growth of aspen. Care must be taken to provide low saline <br />water when irrigating planted aspen trees on reclaimed lands. Low level irrigation and no <br />irrigation growth and survival were similar, suggesting that enough rainfall and soil moisture <br />occurred for the years this experiment so that irrigation was not necessary. It is expected but not <br />tested in this experiment, that supplemental irrigation with clean water may have increased <br />growth and survival above non-irrigated trees. It is expected that all surviving trees now have <br />developed enough root system after three years that further irrigation is not needed. <br />Plant source: <br />Transplanted trees from local sources grew best once established. Most natural suckers did not <br />survive without weeding. Potted plant had a high rate of survival, but growth was lower then for <br />transplants and natural sprouts. Roots of potted aspen general stayed in the augured potting hole. <br />This also occurred for a few of the transplanted trees in the more compact stored dozer cleared <br />soil on the irrigation treatment plots, the same soil type where this occurred for the potted plants. <br />Soil type: <br />Best growth and survival occurred on roto-cleared (fresh) soil compared to dozer cleared (stored) <br />soil. More natural sprouts from residual root segments were evident in roto-cleared soil. It is <br />expected that higher number of natural sprouts was due to the shorter length of soil storage and <br />the soil characteristics rather than the clearing method. The dozer cleared soil appeared to be <br />more compacted and was less well drained than the roto-cleared soil, and it is expected that these <br />physical characteristics were more important to tree growth than the method of clearing. Also, <br />storage effects on the soil were likely more important than method of clearing. <br />Weed control: <br />The best growth of aspen was with trees that were weeded. This was likely related to lower water <br />stress of the trees, since weeds competed with the trees for the limited water supply. This was <br />particularly apparent on the roto-cleared soils where weed competition was high.
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