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Choose deep , well-drained soils to avoid standing water in the spring and encourage early growth . Example applications include measurement of Greenland and Antarctic ice-sheet elevations ( Thomas et al ., 1992 ; Blankenship et al ., 1993 ) , outlet glacier strains and shape changes due to surge events ( Garvin and Williams , 1993 ; Garvin et al ., in revision ) , and the structural properties of vegetation canopy , such as tree height and biomass ( Aldred and Bonnor , 1985 ; Nelson et al ., 1988 a , b ) . If you observe unusual symptoms ( e.g ., wilt , angular leaf spot , deformity ) of plant disease that are inconsistent with gray mold , and Botrytis is recovered , it should be assumed that Botrytis was acting as a decay agent and did not cause plant death . Iris borers and botrytis blight on peony can overwinter in plant debris and old foliage left through the winter . Excess moisture builds up in the plant and causes swellings that appear initially as pale-green or water-soaked blisters or bumps , primarily on the undersides of leaves . However , even though the status of SAR for measuring these quantities is very promising , it is recognized that there are a number of logical steps to be taken in order for the general scientific and public communities to benefit from this research .