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[answered] Lab: Investigating Soils Observations/Data Record the obser


Lab Introduction

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This activity will help you visualize some of the physical properties of soils.?Specifically, you will investigate:

  1. Texture:?Texture relates the amounts of sand, silt, and clay-sized particles in a soil sample.Sandy soils are coarse-textured, and they feel gritty between your fingers.A soil made mostly of silt is medium-textured; it feels smooth like flour between your fingers.A clayey soil is fine-textured and it will feel sticky between your fingers.Most soils are a mixture of sand, silt, and clay and are a type of loam.Depending on where you live and the environmental conditions around you, your local soil may be sandy, silty, clayey, or loamy.
  2. Color:Color is usually a result of the soil?s parent material, though it can also derive from local environmental conditions.Red, yellow and orange colors in a soil usually indicate the presence of iron.Grey colors are sometimes associated with soils that are water-saturated for much of the year.Soils very high in organic matter are usually dark brown or black.
  3. Porosity?and?Permeability:?Porosity?describes?the?number?of?open?spaces,?or?pores,?between?individual?soil?particles.Permeability?describes?how?connected?those?pores?are?and?how?well?water?can?move?downward?through?the?soil.A?soil?that?drains?water?very?quickly?must?have?high?porosity?and?permeability.On?the?other?hand,?a?soil?with?very?slow?drainage?(meaning?that?water?has?a?hard?time?moving?downward?through?it)?will?have?low?porosity?and/or?permeability.


The soil texture flow chart:?http://vro.agriculture.vic.gov.au/dpi/vro/vrosite.nsf/pages/soilhealth_texture_qrg


Check the link for the PDF of my assignment.


Lab: Investigating Soils

 

Observations/Data

 

Record the observations and/or data you collected here.

 

Describe the color, feel, and appearance of each soil sample.

 

Sample 1: Sample 2: Sample 3: What is the texture of each soil sample?

 

Sample 1: Sample 2: Sample 3: Describe the way that water drained from each soil sample.

 

Sample 1: Sample 2: Sample 3: ? KC Distance Learning Analysis

 

Answer the following questions about this lab.

 

1. How did the feel of each soil relate to its texture? 2. Based on your observations, what kind of texture led to the fastest water drainage? What

 

kind of texture led to the slowest water drainage? How do you think texture influences a

 

soil?s porosity and permeability? 3. Which, if any, of your three soil samples would be best suited for good agricultural

 

production? Explain your answer. ? KC Distance Learning

 


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