(par 2.2.1. 6.2) Why Are Earthworms Important?
http://www.earthwormsoc.org.uk/earthworm-information/earthworm-information-page-3 Soil structure Earthworms have been called ‘ecosystem engineers’. Much like human engineers, earthworms change the structure of their environments. Different types of earthworms can make both horizontal and vertical burrows, some of which can be very deep in soils. These burrows create pores through which oxygen and water can enter and carbon dioxide can […]
(par 2.2.1. 6.4) Soil Properties
http://broome.soil.ncsu.edu/ssc012/Lecture/topic8.htm Physical Properties Features of the soil profile and the soil horizons are often described in the field in terms of the soil’s physical properties. Horizons are defined based on difference in the physical properties. Horizons differ from horizons above and below by some physical property. Soil physical properties affect the appearance and feel of […]
(par 2.2.1. 1.4) Photosynthesis – What is it?
Introduction to photosynthesis http://www.eschooltoday.com/photosynthesis/introduction-to-photosynthesis.html Every living creature needs food or energy to survive. Some depend on others for food and energy, whiles others can produce their own food. Plants make their own food, glucose, in a process called photosynthesis. We say that plants can photosynthesise. Photosynthesis and respiration go hand in hand. The result of photosynthesis is glucose, […]