ALEX SHIGO PDF

Alex Shigo May 8, October 6, was a university-trained tree pathologist who was widely considered the "father of modern arboriculture. Shigo's study of tree biology led to a broadened understanding of the compartmentalization of decay in trees. His ideas eventually led to many changes and additions to commercial tree care practices, such as the currently accepted tree pruning method. Shigo received a bachelor's of science degree from Waynesburg College near Duquesne, Pennsylvania. After serving in the Air Force, He continued to study botany, biology, and genetics under his former biology professor, Dr.

Author:Vik Zolobar
Country:Maldives
Language:English (Spanish)
Genre:Finance
Published (Last):24 December 2005
Pages:387
PDF File Size:20.70 Mb
ePub File Size:6.38 Mb
ISBN:120-7-39127-708-2
Downloads:98825
Price:Free* [*Free Regsitration Required]
Uploader:Duzahn



Alex Shigo May 8, October 6, was a university-trained tree pathologist who was widely considered the "father of modern arboriculture. Shigo's study of tree biology led to a broadened understanding of the compartmentalization of decay in trees. His ideas eventually led to many changes and additions to commercial tree care practices, such as the currently accepted tree pruning method.

Shigo received a bachelor's of science degree from Waynesburg College near Duquesne, Pennsylvania. After serving in the Air Force, He continued to study botany, biology, and genetics under his former biology professor, Dr.

Charles Bryner. Shigo moved from Duquesne and continued his education at the University of West Virginia, where he received a combination Masters and Ph. Shigo started a career with the U. Forest Service in In time, he became Chief Scientist for the Forest Service and retired in His earliest assignment, however, was to learn more about tree decay. Shigo used a newly invented one-man chainsaw to "open" trees in a way no one else had, by making longitudinal cuts along the stem rather than transverse cuts across the stem.

His tree "autopsy" technique led to many important discoveries, some of which were and are controversial. Shigo believed that trees are not made up of "mostly dead wood" but rather can contain disease by creating compartments.

Shigo found that trees respond to injuries by sealing the wounded area through the process of "compartmentalization. Instead of "healing" like our skin, an injury to a tree trunk results in surrounding cells changing themselves chemically and physically to prevent the spread of decay.

New cells are produced by cells lining the cut area to cover and seal the injured area. Instead of trees healing, trees actually seal. Shigo's biological findings are not always popular with arborists. His findings disputed the validity of many old techniques that the arboricultural industry has used for over a century and taken for granted as undeniably true.

His work showed that the traditional methods were unnecessary or, even worse, harmful. In Shigo's defense, his conclusions have been confirmed by other researchers and are now a part of current ANSI standards for tree pruning. The bad news is that many commercial arborists continue to perform flush cuts, toppings, and other practices that Dr. Shigo's research showed to be harmful. In many cases, arborists perform these practices knowing they are harmful, but believing their business cannot survive by practicing their craft under Shigo guidelines.

He was at his summer cottage at the lake, going to his office after dinner when he fell going down the steps, landing on the patio, and died from a broken neck. Share Flipboard Email. Steve Nix. Forestry Expert. Steve Nix is a natural resources consultant and a former forest resources analyst for the state of Alabama.

He is a member of the Society of American Foresters. Updated November 10, ThoughtCo uses cookies to provide you with a great user experience. By using ThoughtCo, you accept our.

ECOG 1594 PDF

Similar authors to follow

Alex L. He travelled and lectured widely to promote understanding of tree biology among arborists and foresters. His large body of primary research serves as a broad foundation for further research in tree biology. Shigo was born in Duquesne, Pennsylvania. Forest Service as a tree pathologist. He served there as Chief Scientist for 25 years and retired in

ARTHUR CLARKE 2001 ODISSEA NELLO SPAZIO PDF

Dr. Alex Shigo

.

AJINOMOTO ASPARTAME PDF

Alex Shigo

.

Related Articles