Soil porosity - The total volume of soil occupied by soil pores., Soil air composition - 79% nitrogen, 20% oxygen, 1% carbon dioxide, Hygroscopic water - Thin film around soil particle, cannot be removed from plants and isn't available to plants, Gravitational water - Is moved through soil by gravity, Floculation - Clustering together of soil particles to create larger structures called floccules , Field capactity - Amount of water a soil contains after excess water is drained over a period of time, Chemical weathering - Breaking down of rocks chemically >:), Permanent wilting point - Minimum amount of water a plants needs to not wilt, Available water capacity - Amount of water a soil can hold to be used by plants , Separation - When soil aggregates separate in the soil , Cementation - The binding together of soils,

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