Sentence examples for more stem volume from inspiring English sources
After 5 years, mulched hybrid poplar produced 774 times more stem volume than red oak without mulch.
Long-term experiments show that in relation to the weighted mean of the monospecific stands, mixed-species stands produce 11 30% more stem volume (Pretzsch 2016).
A highly relevant finding for practitioners is that mixed stands can often produce more stem volume than the weighted mean of neighbouring monocultures (i.e., overyielding), or even more than is achieved by the most productive species of the respective assemblage when in monoculture (transgressive overyielding).
Overyielding represents a higher efficiency of space use in that a given area of mixed stands yields more stem wood volume and fixes and stores more carbon than equivalent areas of monospecific stands.
Estimation of the 300 Index, which is a measure of stem volume productivity, is more complex because, unlike height, stem volume is strongly influenced by stocking and, to a lesser extent, thinning and pruning history.
Results confirmed that the positive effects of thinning on mean stem volume is due more to the higher diameter increment than to different height growth.
"We need studies that look at exactly how the skin tissue responds and whether more volume is retained if you use more stem cells," Dr. Gutowski said.
Their study found a 26% decrease in stem volume, with a lower yield of more valuable pruned logs.
A 10% reduction in mean tree diameter at breast height was found in the slip-eroded areas in addition to 26% less total stem volume per hectare and a lower yield of more valuable pruned logs.
A valid test will normally require evacuation to remove contaminant gases and vapours (usually water) and also ensuring that not less than 20%% of the penetrometer stem volume is displaced into the sample (Dsouza and More 2008).
By assessing variability in volume per hectare, stocking rate, and mean tree volume across a range of cell sizes from 10 × 10 to 100 × 100 m, we conclude that a cell length between 30 and 40 m is suitable for use as a reference when calculating volume per hectare and mean stem volume, while a 60-m-long cell is more suitable for evaluating stocking density.
