Assertion: gardener | /r/CapableOf | improve drainage
Facets:
Source sentences:
text: For example, red sorrel (Rumex acetosella), docks (Rumex sp.), lady's thumb (Polygonum persicaria) and horsetail (Equisetum sp.) all indicate low pH. Pfeiffer suggested that gardeners could improve their soil by adding non-acidic organic matter, growing cover crops, improving drainage and/or adding lime.