Search results
Results from the WOW.Com Content Network
The mean annual increment (MAI) or mean annual growth refers to the average growth per year a tree or stand of trees has exhibited/experienced up to a specified age. For example, a 20-year-old tree that has a stem volume of 0.2 m 3 has an MAI of 0.01 m 3 /year.
Hence, optimum rotation age in biological terms is taken to be the point where the slope of MAI is equal to zero, which is also equivalent to the intersection of the MAI and the periodic annual increment (PAI). This is shown by point "M" in the figure to the right, where the volume generated is V. Beyond the age A, the MAI, starts to decline.
Where: Y is the yield (volume, height, DBH, etc.) at times 1 and 2 and T 1 represents the year starting the growth period, and T 2 is the end year. Example: Say that the growth period is from age 5 to age 10, and the yield (height of the tree), is 14 feet at the beginning of the period and 34 feet at the end.
Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.
A nightly 9:00 p.m. curfew is also changed to 11:00 p.m. COVID-19 pandemic in the United States. COVID-19 pandemic in Connecticut. Governor Ned Lamont announces that Connecticut has fully vaccinated 50% of its adult population, thereby making it the first state to do so. (Connecticut Post) COVID-19 pandemic in Florida
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
This is an accepted version of this page This is the latest accepted revision, reviewed on 3 February 2025. 2020 January February March April May June July August September October November December This article is about the year 2020. For other uses, see 2020 (disambiguation). "MMXX" redirects here. For the album, see MMXX (album). Clockwise, from top left: Ukraine International Airlines ...
The atmospheric methane concentration has continued to increase since 2011 to an average global concentration of 1911.8 ± 0.6 ppb as of 2022. [16] The May 2021 peak was 1891.6 ppb, while the April 2022 peak was 1909.4 ppb, a 0.9% increase. [55] Annual atmospheric methane concentrations from 1990 to 2021.