SAFS 421 Lecture Notes - Lecture 13: Field Capacity, Bulk Density, Aeration
9 Dec 2017
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Document Summary
Physical (texture and structure), chemical (ph and ec), biological properties (organic matter) Medium and anchorage for plants to grow. Recycling systems for nutrients and decomposing organisms. Cycle nutrients (mineralization through bacteria and microbes, breaking organic matter down into plant-ready mineral form (ammonium or nitrate)) Resist erosion (presence of organic matter can help with that) Provides plant with water and nutrients: need to be located in the soil solution. Ability of soil to perform its ecological functions. Different from soil fertility organic and sustainable ag does more than just. Integrates the physical and chemical and biological conditions provide mineral nutrition to crops. A horizon: presence of some humus and organic matter, but a lot more mineral particles. As further down, less organic matter, until you hit the c horizon, which is the underlying bedrock. Most crops will enter a horizon, and maybe the b horizon in the case of a fruit tree. Mineral matter (45%) weathered rocks into different sized particles.
