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Map of average growing season length from "Geography of Ohio," 1923. A season is a division of the year marked by changes in weather, ecology, and the amount of daylight. The growing season is that portion of the year in which local conditions (i.e. rainfall, temperature, daylight) permit normal plant growth.
The agricultural growing season has also expanded by 10–20 days over the last few decades. [20] The effects of season creep have been noted by non-scientists as well, including gardeners who have advanced their spring planting times, [21] and experimented with plantings of less hardy warmer climate varieties of non-native plants. [22]
Eriophyes tiliae is a mite that forms the lime nail gall or bugle gall. [2] It develops in a chemically induced gall ; an erect, oblique or curved distortion rising up from the upper surface of the leaves of the lime (linden) trees (genus Tilia ), such as the large-leaved lime tree Tilia platyphyllos , the common lime tree Tilia × europaea , etc.
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.
In the United States, the forest cover by state and territory is estimated from tree-attributes using the basic statistics reported by the Forest Inventory and Analysis (FIA) program of the Forest Service. [2] Tree volumes and weights are not directly measured in the field, but computed from other variables that can be measured. [3] [4]
When stocking, a tree's basal area is measured. The basal area is a cross-sectional area of the stump taken about 4.5 feet (1.4 m) above the ground. [7] The equation for calculating the basal area of trees in a stand is Basal Area = 0.005454 DBH 2, where DBH is the diameter of the tree at the aforementioned measuring height. [7]
Spring is officially a month away — the start date is March 20 — and yet the allergy season associated with it has already made its presence known in South Carolina.
The North Carolina State Climate Office at North Carolina State University reported that its Mount Mitchell weather station recorded 24.41 in (620 mm) of rainfall. [22] The office referred to the total as "off the charts", comparing it to 16.5 in (420 mm) of rainfall being a once-in-1,000-year flood for the area.