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Irrigation 2

Irrigation 2
23問 • 2年前
  • ezekiel emano
    • 通報

    問題一覧

  • 1

    Three main soil separates

    SAND, SILT,

  • 2

    SAND

    2.0 mm to 0.05 mm

  • 3

    CLAY

    less than. 0.002 mm

  • 4

    SILT

    0.05 mm to 0.002 mm

  • 5

    refers to the relative proportion of various size groups of individual soil. grains.

    SOIL TEXTURE

  • 6

    Used if the necessary laboratory equipment is not available.

    feel analysis

  • 7

    Percentages of Sand, Silt and Clay in the sample are measured.

    Soil Texture Triangle

  • 8

    •the arrangements of primary particles in the soil into units or peds

    soil structure

  • 9

    •the ratio of the void volume to the total soil volume. It is denoted by the letter “n”.

    porosity

  • 10

    Importance of Soil Porosity

    1.Water and Air Movement 2.NutrientAvailability 3.Root Growth and Development 4.Soil Aeration 5.Soil Temperature Regulation

  • 11

    The measure of the amount of water in the soil.It can be expressed as a dry mass basis or volume basis.

    moisture content

  • 12

    The ratio of the weight of water to the dry weight of the soil

    Dry Mass basis

  • 13

    the ratio of the volume of water to the total soil volume

    volume basis

  • 14

    MEASUREMENT (OR ESTIMATION OF MOISTURE CONTENT

    1.Gravimetric Method 2.Soil Moisture Sensors 3.Remote Sensing

  • 15

    Compute for the soil moisture content as a percentage of dry mass weight.

    gravimetric method

  • 16

    the ratio of the dry weight of the soil to the total soil volume

    bulk density

  • 17

    the ratio of the dry weight of the soil to the volume of the soil particles

    particle density

  • 18

    ratio of the bulk density of the soil with the density of water; it is the ratio of the weight of soil to the weight of water with volume equal to the total soil volume

    APPARENT SPECIFIC GRAVITY

  • 19

    ratio of the particle density of the soil with the density of water;

    REAL SPECIFIC GRAVITY

  • 20

    SOIL MOISTURE CONSTANT

    (RAM) Readily Available Moisture Permanent Wilting Point (or wilting coefficient) (AM) Available Moisture

  • 21

    -that portion of the available moisture that is most easily extracted by plants;

    (RAM) Readily Available Moisture

  • 22

    the soil moisture content when plants permanently wilt

    Permanent Wilting Point (or wilting coefficient)

  • 23

    -the difference in moisture content of the soil between field capacity and the permanent wilting point.

    Available Moisture (AM)

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    52問 • 2年前
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    ezekiel emano · 15問 · 2年前

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    15問 • 2年前
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    問題一覧

  • 1

    Three main soil separates

    SAND, SILT,

  • 2

    SAND

    2.0 mm to 0.05 mm

  • 3

    CLAY

    less than. 0.002 mm

  • 4

    SILT

    0.05 mm to 0.002 mm

  • 5

    refers to the relative proportion of various size groups of individual soil. grains.

    SOIL TEXTURE

  • 6

    Used if the necessary laboratory equipment is not available.

    feel analysis

  • 7

    Percentages of Sand, Silt and Clay in the sample are measured.

    Soil Texture Triangle

  • 8

    •the arrangements of primary particles in the soil into units or peds

    soil structure

  • 9

    •the ratio of the void volume to the total soil volume. It is denoted by the letter “n”.

    porosity

  • 10

    Importance of Soil Porosity

    1.Water and Air Movement 2.NutrientAvailability 3.Root Growth and Development 4.Soil Aeration 5.Soil Temperature Regulation

  • 11

    The measure of the amount of water in the soil.It can be expressed as a dry mass basis or volume basis.

    moisture content

  • 12

    The ratio of the weight of water to the dry weight of the soil

    Dry Mass basis

  • 13

    the ratio of the volume of water to the total soil volume

    volume basis

  • 14

    MEASUREMENT (OR ESTIMATION OF MOISTURE CONTENT

    1.Gravimetric Method 2.Soil Moisture Sensors 3.Remote Sensing

  • 15

    Compute for the soil moisture content as a percentage of dry mass weight.

    gravimetric method

  • 16

    the ratio of the dry weight of the soil to the total soil volume

    bulk density

  • 17

    the ratio of the dry weight of the soil to the volume of the soil particles

    particle density

  • 18

    ratio of the bulk density of the soil with the density of water; it is the ratio of the weight of soil to the weight of water with volume equal to the total soil volume

    APPARENT SPECIFIC GRAVITY

  • 19

    ratio of the particle density of the soil with the density of water;

    REAL SPECIFIC GRAVITY

  • 20

    SOIL MOISTURE CONSTANT

    (RAM) Readily Available Moisture Permanent Wilting Point (or wilting coefficient) (AM) Available Moisture

  • 21

    -that portion of the available moisture that is most easily extracted by plants;

    (RAM) Readily Available Moisture

  • 22

    the soil moisture content when plants permanently wilt

    Permanent Wilting Point (or wilting coefficient)

  • 23

    -the difference in moisture content of the soil between field capacity and the permanent wilting point.

    Available Moisture (AM)