SCIN135 Lab1
Lab 1 Forestry NAME________________________________________
Forest Mensuration Techniques
For this lab you will need a tree, a yardstick (a measuring tape may also help), paper and pencil, this worksheet, and a stick of any sort.
If you do not have a tree (desert deployment, etc.) you may use any tall object – a building, flagpole, utility pole, etc. The principles remain the same.
You are to complete 3 exercises (I, II, & IIIa or IIIb)– each measures trees using variations on the same technique. Download this lab sheet to your computer and fill in the answers. Then use the worksheet to complete the Lab 2 assignment under Tests and Quizzes.
Answer the set of questions following each exercise.
If you do not get a sunny day where you are located, please use Exercise IIIb below as an alternative to Exercise IIIa. Otherwise, you MUST do Exercise IIIa.
Be SAFE and do not measure trees if thunderstorms are nearby.
USE THE SAME TREE FOR ALL THREE EXERCISES.
USE THE SAME TREE FOR ALL THREE EXERCISES.
I. Tree Height Measurement by Michael Kuhns, Extension Forestry Specialist
You can measure heights of very tall objects such as trees by projecting a right triangle (one that includes a 90 degree angle) using your arm, a stick, and your line-of sight.
Material: A stick that is equal in length to the distance from your eye (cheekbone) to your fingers when your arm is fully extended in front of your face. Break off part of the stick or mark it at the correct length if you don't find one that is exactly right.
Procedure:
1. Grasp the stick by the tips of the thumb and index finger and hold it out in front of you with your arm fully extended. The stick must be held vertical.
2. Walk toward or away from the tree until the tip of the stick is visually lined up with the top of the tree and the bottom of the stick is lined up with the bottom of the tree. Your line of sight to the tree base should be as close as possible to horizontal. In sighting to the top and
Forest Mensuration Techniques
For this lab you will need a tree, a yardstick (a measuring tape may also help), paper and pencil, this worksheet, and a stick of any sort.
If you do not have a tree (desert deployment, etc.) you may use any tall object – a building, flagpole, utility pole, etc. The principles remain the same.
You are to complete 3 exercises (I, II, & IIIa or IIIb)– each measures trees using variations on the same technique. Download this lab sheet to your computer and fill in the answers. Then use the worksheet to complete the Lab 2 assignment under Tests and Quizzes.
Answer the set of questions following each exercise.
If you do not get a sunny day where you are located, please use Exercise IIIb below as an alternative to Exercise IIIa. Otherwise, you MUST do Exercise IIIa.
Be SAFE and do not measure trees if thunderstorms are nearby.
USE THE SAME TREE FOR ALL THREE EXERCISES.
USE THE SAME TREE FOR ALL THREE EXERCISES.
I. Tree Height Measurement by Michael Kuhns, Extension Forestry Specialist
You can measure heights of very tall objects such as trees by projecting a right triangle (one that includes a 90 degree angle) using your arm, a stick, and your line-of sight.
Material: A stick that is equal in length to the distance from your eye (cheekbone) to your fingers when your arm is fully extended in front of your face. Break off part of the stick or mark it at the correct length if you don't find one that is exactly right.
Procedure:
1. Grasp the stick by the tips of the thumb and index finger and hold it out in front of you with your arm fully extended. The stick must be held vertical.
2. Walk toward or away from the tree until the tip of the stick is visually lined up with the top of the tree and the bottom of the stick is lined up with the bottom of the tree. Your line of sight to the tree base should be as close as possible to horizontal. In sighting to the top and