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July 2017
TABLE 3: SALIENT ANALYTICAL DATA FOR THE DEGRADED SOIL TAKEN DURING THE
GROWING SEASON OF A SUMMER COVER CROP MIX.
Soil pH (H
2
O)
7,3
Soluble salts
mmho/cm
0,3
Excess lime rating
1
Soil organic matter, LOI %
0,8
Calcium
Parts per million (ppm)
187
Aluminium extractable
ppm
651,6
Phosphorus saturation
%
4,6
Iron extractable
ppm
378
1: Soil with surface crusts and signs of
severe erosion.
2: Fully developed mixed summer cover crop
system.
3: A 100% cover by the mixed summer cover
crop residues.
4: Field with summer cover crop residues
just before planting the maize crop.
5: Maize established after the summer
cover crop showing no signs of nutrient
deficiencies.
1
3
5
2
4