Flashcards
Soils
Cards in this deck (12)
- 1Soil isA thin layer of loose material on the earths surface
- 2Soil is mainly made ofWater, air, mineral particles, humus, roots and organisms
- 3The factors that influence the formation of soil areClimate, Parent Material, living organisms, landscape, vegetation and time
- 4The main soils found in Ireland areBrown, Podzol, peaty and gley soils
- 5Soil is important becauseWithout it plants wouldn’t grow
- 6The 4 main layers of soil areHorizon A, B, C and O horizon
- 7Most of the organisms live in which layer of soil?The A horizon (topsoil)
- 8Beneath the topsoil isThe subsoil (B horizon)
- 9The deepest layer of soil is calledThe C horizon (parent rock/bedrock)
- 10The O horizon is the small layer at the very top which containsOrganic material
- 11Leaching occurs whenHeavy rainfall washes minerals and nutrients down to the subsoil (B horizon)
- 12Leaching is bad becauseA horizon loses fertility as plant can’t reach nutrients in B horizon