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Current Category » Introduction to Soil Science

Role of soil structure in relation to plant growth

  1. Soil structure influences the amount and nature of porosity.

  2. Structure controls the amount of water and air present in the soil. Not only the amount of water and air dependent on soil structure, but their movement and circulation are also controlled by soil structure.

  3. It affects tillage practices.

  4. Structure controls runoff and erosion.

  5. Platy structure normally hinders free drainage whereas sphere like structure (granular and crumby) helps in drainage.

  6. Crumby and granular structure provides optimum infiltration, water holding capacity, aeration and drainage. It also provides good habitat for microorganisms and supply of nutrients.

Class of Soil Structure as differentiated by size of soil peds
 


Class

Platy

Prism-atic

Colum-nar

Blocky

S.A. Blocky

Gran-ular

Crumb

V.Fine or V.Thin

<1

<10

<10

<5

<5

<1

<1

Fine or Thin

1-2

10-20

10-20

5-10

5-10

1-2

1-2

Medi

2-5

20-50

20-50

10-20

10-20

2-5

2-5

um

5-10

50-100

50-100

20-50

20-50

5-10

-

Coarseor Thick

>10

>100

>100

>50

>50

>10

-

V.C

>10

>100

>100

>50

>50

>10

-

or V.Thic

 

Current Category » Introduction to Soil Science