introduction to soil physicsindico.ictp.it/event/a12165/session/2/contribution/2/... · 2014. 5....
TRANSCRIPT
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2444-1
College on Soil Physics - 30th Anniversary (1983-2013)
GABRIELS Donald Maurice
25 February - 1 March, 2013
University of Ghent Laboratory of Soil Physics
Fac. Agric.& Appl. Biol.Sciences, Dept. of Soil Management Coupure Links 653, B-9000 Ghent
BELGIUM
Introduction to Soil Physics
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30years
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Air:vapor, gass
Air: vapor, gass in the soil
Air: (vapor and gass) in the
atmosphere
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FIRE SUN
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⇒⇒ ⇒
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→→
→
“Mystic Lamb John and Hubert Van Eyck
Gent, Belgium
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→→
→
→
“Gaia”
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→
Link soils and mankind?
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Human
soil
Man-agement
medicine
Ecosystem
science of nature: Physics-Naturkunde
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Isaac Newton (1643-1727)
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→
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Justus von Liebig (1803-1873)
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→
→
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Porosity and bulk density (apparent density) Water retention curve (pF) θ(h) Hydraulic Conductivity Ks, K(h) Aggregate stability Mechanical Resistance Consistency
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Hillel (1998)
compaction
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Law of capilarity of Hagen-Poisseuille
→→
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ϕ
x
y
R1
particle 1
particle 2
R2air
air
water
Joseph Plateau (1801-1883)
Phenakistoscoop
→
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Microscopic scale
4 cm →
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17 cm
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→
pF permeametro - Ks
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Lublin, Polen Lubljana, Slovenië
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→→ →
HYDRUS-2D zanjas, La Serena, Chile
Infiltration channels (La Serena, Chile)
La Serena, Chile
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→ →
plowing furrows Tigray, Ethiopië
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Gent Tandojam, Pakistan -
• • • •
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Luoyang, China Alemaya, Ethiopië
• • • • •
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→ 2. water balance in the field effect of tillage (China)
Conventional tillage
Subsoiling Minimum tillage
Two crops System
Zero tillage
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→
Hydrus-2D
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Map of Arid Zones of South America
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“… the nation that destroys its soil, destroys itself…"
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10th Anniversary College on Soil Physics y g6 September – 24 September 1993 p
I.C.T.P. - Trieste, Italy
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