Abbreviations: ECB, European corn borer; EH, ear height; LOD, log-odds ratio; MoSCSSS-High, MoSCSSS(H24-HRP)C10; MoSCSSS-Low, MoSCSSS(H25-LRP)C11; MoSQB-Low, MoSQB(S10)C6; PH, plant height; QTL, quantitative trait locus; [R.sup.2], percent of phenotypic variation explained; RadjE, rind penetrometer
resistance adjusted for ear height; RPR, rind penetrometer
resistance; SSR, simple sequence repeat; TL, tunnel length.
Soil cone penetrometer
measurements must be carefully spaced to prevent interference with each other.
Finally, changes in penetrometer
data between sampling dates was not reflected by differences in bulk density and saturated hydraulic conductivity.
Correlations between the shear vane and the penetrometer
were investigated so that root growth critical limits from the literature, expressed in terms of penetration resistance, can be converted, if required, for use with the shear vane.
A concern about acquiring soil cone penetrometer
data is variability within fields.
"I'm leaving the going as good with a penetrometer
reading of 3.2 so it should be perfect ground.
resistance was measured in situ using a hand-driven penetrometer
with a 2-mm-diameter relieved conical 30 [degrees] tip, both at 24 h after irrigation (approximately 10 kPa soil-water suction) and again when the soil at 20-80 mm depth was air dry after prolonged drying in autumn when irrigation was stopped after fruit harvest.
The ground yesterday was given as soft to very soft - 3.7 on the penetrometer
reading of 3.7 suggests that it had dried out a bit from yesterday," he added.