Juma, N. 1999. The pedosphere and its dynamics. Salmon Productions, - - PowerPoint PPT Presentation

▶

Nov 19, 2023 292 likes •472 views

Juma, N. 1999. The pedosphere and its dynamics. Salmon Productions, Edmonton, Alberta, Canada Soil Pore Solids Space Air 20 30% Mineral 45% Water 20 30% Organic 5% Capillary Fringe (est. thickness) Soil Range in Depth Avg.

SLIDE 1

SLIDE 2

Juma, N. 1999. The pedosphere and its dynamics. Salmon Productions, Edmonton, Alberta, Canada

SLIDE 3

Air 20 – 30% Water 20 – 30% Mineral 45% Organic 5% Pore Space Soil Solids

SLIDE 4

Capillary Fringe

(est. thickness) <60 in. 5-10 ft. Clays <12 in. 0.5 – 5 ft. Silts 2 in. 0-3 in. Sands Avg. Range in Depth Soil

SLIDE 5

SLIDE 6

SLIDE 7

SLIDE 8

Bedrock Solum O - Organic A – Mineral Mixed with

humus, dark colored

E - Horizon of maximum

eluviation of silicate clays, Fe, Al oxides

B - Horizon of maximum

illuviation of material

C - Zone of least weathering,

accumulation of Ca & Mg carbonates, cementation, etc.

R

SLIDE 9

SLIDE 10

Coarse Sand 18” Fine Sand Silt Silt Clay Coarse Sand Silt 8” Silt Clay

Water Infiltration Water Infiltration Rapid Moderate/ slow Moderate Slow

SLIDE 11

SLIDE 12

Juma, N. 1999. The pedosphere and its dynamics. Salmon Productions, Edmonton, Alberta, Canada

SLIDE 13

SLIDE 14

Example of macropore formation due to soil shrinkage and cracking

SLIDE 15

Example of surface sealing due to soil swelling.

SLIDE 16

SLIDE 17

Jury, W.A., W.R. Gardner, and W.H. Gardner.

1991. Soil physics, 5th ed. John Wiley & Sons, Inc.

New York.