On average, ground-living natural enemies of pests increased barley yields by 303 kg/ha.
Ecologic studies, while providing weaker evidence, also have been largely consistent in showing a negative correlation between breast cancer risk and potential UV exposure, based on average ground-level solar energy (Garland et al. 1990; Gorham et al. 1990), latitude (Grant 2010), or acid haze (Gorham et al. 1989).
During this study average ground cover on hillslopes increased from ∼35%to∼75%5%, although average biomass and litter levels are still relatively low for this landscape type (∼60 increasing to 1100 kg of dry matter per hectare).
He found eight such sustained periods, and saw that half of the 10 market sectors, on average, gained ground during those times; the others declined or were flat.
However, the gamma-spectrometric surveys showed significantly higher concentrations for all three elements in arable as compared to forest areas, both for airborne (U: + 18%; Th: + 18%; K: + 27% on average) and ground measurements (U: + 21%; Th: + 19%; K: + 17% on average).
The average ground sampling distance (GSD) was 4.5 cm on the ground at a flight altitude of 150 m.
Most ecological studies of the effects of climate on species are based on average conditions above ground level (measured by meteorological stations) averaged across 100 km2 or larger areas.
There have been some notable successes at country level, but over the past 15 years, this region on average has lost ground in keeping children alive and healthy.
The University of Edinburgh study, which looked at hundreds of species across five continents, found that birds are reaching their summer breeding grounds on average about one day earlier per degree of increasing global temperature.
The number of days with snow covering the ground (one month on average) and days of frost in our study area is relatively high for a Mediterranean region.
When all electrical potential are not symmetric about ground, it was found that the mechanical potential becomes weaker toward the distribution buses that are on average further away from ground.
