Soil physics

Soil physics

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ﺮﮐﺬﺗ ﻢﻬﻣ

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ﻞﯾﺎﻓ  ﻪﺋارا

هﺪﺷ ﺖﻬﺟ

ﯽﯾﺎﻨﺷآ ﻮﺠﺸﻧاد

ﺎﺑ ﯽﻧﺎﺒﻣ

وهدﻮﺑ ﯽﺷزﻮﻣآ ﮏﻤﮐ ًﺎﻓﺮﺻ وكﺎﺧ ﮏﯿﻧﺎﮑﻣ يﺎﻨﺒﻣ

ﯿﺷزرا

،ﯽﺑﺎ

. ﺪﺷﺎﺑ ﯽﻣ بﺎﺘﮐ وسﻼﮐ رد هﺪﺷ ﻪﺋارا ﺐﻟﺎﻄﻣ ﻦﮑﻤﻣ 

ﺖﺳا رد

ﯽﻀﻌﺑ ﺎﻫﺪﯾﻼﺳا

زا فوﺮﺣ و

ﺲﯾﺪﻧا

ﯽﯾﺎﻫﻪﺋارا يﺎﻫ ﺲﯾﺪﻧا وفوﺮﺣ ﺎﺑﺮﯾﺎﻐﻣ ﻪﮐ ﺪﺷﺎﺑ هﺪﺷ هدﺎﻔﺘﺳا هﺪﺷ

.ﺪﯿﺋﺎﻣﺮﻓ حﻼﺻا ﺎﻔﻄﻟ ،ﺪﺷﺎﺑ سﻼﮐرد

Igneous rocks

Sedimentary rocks

Metamorphic rocks

G ra n u la r

P la ty

B lo c k y

(A n g u la r) (S u b a n g u la r)

W e d g e

C o lu m n a r P ris m a tic

Particle size

Particle size

Soil structure

Soil structure

Soil structure

Specific surface

The specific surface is the total surface area per unit of mass or bulk volume. Generally it

increases with decreasing particle size. It also depends on the particle shape

Soil type Specific surface (m² g^-1)

Sand <10

Sandy loam 5-20

Clay >25

Organic matter 500-800

Bentonite 100-200