Growth of Trees With the Grain How trees

Growth of Trees With the Grain

How trees grow Stages of growth 1. Seed 2. Plumule 3. Seedling 4. Sapling 1. Seed produces a radicle “taproot” growing downwards. 2. The plumule then develops which grows upwards out of the soil and contains the first 3. At the seedling stage photosynthesis can begin. 4. After approximately 3 years the seedling is know as a sapling. It can now be planted in With the Grain a managed forest.

Annual Growth Rings Medullary Ray Cells Bark Annual Rings Pith With the Grain

Determine the age of a tree Latewood Grows slowly during autumn and winter { Earlywood One light area and one dark area represents one years Grows quickly during spring and summer With the Grain

Cross section of a tree trunk Pith = oldest part of tree Medullay rays = sap transportation Heartwood = gives strength Sapwood = moisture transportation and strength Cambium layer = growth layer Bast = moisture transportation Bark = protection With the Grain

Parts of a tree Crown • Consists of leaves and branches “canopy” • Food for the tree is manufactured in the crown using a process called photosynthesis. • Reproduction begins in the crown Trunk • Holds the crown high into the air towards the sunlight • Strong part of the tree where the prime industry timber is sawn from. Roots • With the Grain Anchors the tree to the ground. • Absorbs moisture and nutrients

Photosynthesis Trees make their own food this process is called photosynthesis Photosynthesis requirements 1. Light 2. Nutrients/water 3. Carbon dioxide “CO 2” Sunlight is attracted to the leaves Chlorophyll This is a green substance in leaves It converts light, water and carbon dioxide into sugar and oxygen. Oxygen is released Carbon Dioxide is absorbed Food travels back down Water and minerals are absorbed With the Grain

Transpiration Evaporation Siphon effect With the Grain