Spring 2021 Spring 2021 https://www.globe.gov/c/message_boards/find_thread?p_l_id=18703103&threadId=81037895 2026-05-31T14:38:22Z 2026-05-31T14:38:22Z Spring 2021 Snježana Marković-Zoraja https://www.globe.gov/c/message_boards/find_message?p_l_id=18703103&messageId=81037894 2021-04-23T22:33:50Z 2021-04-23T22:33:50Z Greetings  from Karlovac, Croatia!<br /> We observed birch tree (Betula pendula L.) on April 23th 2021.<br />​​​​​​​ Betula pendula , lenght of leaves<br /><img src="https://www.globe.gov/documents/18702582/0/Breza23.4..jpg/5305ca03-1c0a-6414-dd56-2c98d2e21f42?t=1619217124983&amp;imagePreview=1" /><br />​​​​​​​1. leaf: 51  mm, 2.leaf: 56 mm, 3.leaf: 56 mm, 4.leaf: 54 mm<img src="https://www.globe.gov/documents/18702582/0/Breza.list23.4..jpg/661ba5b8-7897-87fe-848e-5a31ca278b9e?t=1619217169691&amp;imagePreview=1" /><br /><br />Location of our tree:<br />latitude: 45.4916,<br />longitude: 15.5376<br />elevation : 111 m<br />tree height: 18,5 m<br /><br /><img src="https://www.globe.gov/documents/18702582/0/Photo-Funduk-640.173.272%2C594741.jpg/3d7b57b1-6f6b-9af2-3468-93420173a574?t=1619217077529&amp;imagePreview=1" /><br />And students work: Carbon cycle<img src="https://www.globe.gov/documents/18702582/0/Betula.pendula202..png/0194bd6b-3e78-fd41-7a20-cd4102ecc5d7?t=1619217203673&amp;imagePreview=1" /> Snježana Marković-Zoraja 2021-04-23T22:33:50Z