Post on 30-May-2018
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8/9/2019 Aagw2010 June 10 Larisa Golovko Back to Basics Soil Ec as a Proxy to Map Other Soil Properties
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Larisa Golovko 1
Anatoly Pozdnyakov 2
Landviser, LLC
1 RiceTec, Inc - Houston, TX USA2 Moscow State University, College of Soil Science Moscow,
RUSSIA
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just dirtall soils are the samesubstrate for plantsI just add water and fertilizer, use prime seeds myyields will be high
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Those opinions are very shallow!
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Parent material (geology)Climate (temperatureand precipitation)TopographyVegetationTime
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If we can map and understand soils, we can understandthe basics of any agro-ecosystem!
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Prime land11%
Too dry28%
Too humid10%
Chemicallyimbalanced
23%
Too shallow22%
Permanently
frozen6%
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Water quality?Soil quality?Soil horizons?Groundwater depth?
EC/ER is a good RS indicator of soil and waterquality, especially salinity levels and GW depth!
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Fits in shirt pocketRuns all season from standard9V battery
Measures EC/ER in soil, water,food samples as well as in thefield soils from 2 cm to ~10 mdepth
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Probes can be made to anysize/configuration frommaterials available in anylocal hardware store:
Nails/screwsIsolated wiresbanana- plugsPVC pipes,
plastic or wood
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Chemical properties: saltcontent, CEC, humuscontent, etc.
Intrusions of highresistivity: stones and oil
Physical properties: bulkdensity, water content,temperature, texture
Water movement; soilfreezing-melting, soilcompaction or mixing
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Spatial variabilityTemporal variability
Many samples areneeded tocharacterize asingle field.
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management practiceswater table depthssoil propertiesevapotranspiration rates
rainfallssalinity levels ofgroundwaterhydrogeological conditions
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0
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4060
80
100
120140
1 10 100 1000 10000AB/2 cm
E R ,
O h m
m
Water
table
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Good soil EC in top 30 cm < 1.5 dS/m measured inflooded or mud conditions
EC of irrigation water
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65
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C o c
o d r i
e
T r e n a
s s e
J u p i t e
r
C y p r
e s s
C L X
L 7 3
0
X P 7 2
3
R U
0 5 0 2
1 3 7
R U
0 5 0 1
1 0 2
R U
0 4 0 2
0 9 7
C h e
n i e
r e
% o
f h e a l t h y p l a n t s
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