Pat Kiewicz
23-01-2003, 12:06 PM
David Hare-Scott said:
>
>Do you have a reference for the significance of different kinds of
>weeds?
According to "Weeds and What They Tell" by Erenfried D. Pfeiffer...
Indicating acid soil: sorrels, docks, fingerleaf weeds, lady's thumb and horsetail.
Also hawkweed and knapweed.
Indicating crust formation and/or hard pan: field mustard, horse nettle, penny cress,
moring glory, quack grass, camomiles, pine apple weed.
Weeds of cultivation (frequently spreading with manure and compost): lamb's
quarters, plantain, chickweed, buttercup, dandelion, nettle, prostrate knotweed,
prickly lettuce, field speedwell, rough pigweed, common horehound, celandine,
mallows, carpetweed and similar plants.
Frequent weeds on slightly acid soil (which may occur at the surface even
in an area with limey substrate) due to insufficient cultivation: daisies, horsetail,
field sorrel, prostrate knotweed
Very acid soil, mainly due to wrong cultivation and insufficient drainage: cinquefoil,
swampy horsetail. Hawkweed and knapweed also on 'wild' soils.
Salty soils: shepherd's purse, Russian thistle, sea plantain, sea aster, Artemisia
maritima.
Much potassium in the soil: Marsh mallow, wormwood, knapweed, fumatory, opium
poppy. Red clover disappears with a lack of potassium and increase in acidity
Absence of lime: yellow or hop clover, rabbits foot clover, fox glove, wild pansy (in
lawns), garden sorrel, sundews, white mullein, Scotch broom, black vetchling
(There's a WHOLE LOT more, including discussions of families of weedy plants.)
--
Pat in Plymouth MI
Any technology distinguishable from magic is insufficiently advanced.
(attributed to Don Marti)
>
>Do you have a reference for the significance of different kinds of
>weeds?
According to "Weeds and What They Tell" by Erenfried D. Pfeiffer...
Indicating acid soil: sorrels, docks, fingerleaf weeds, lady's thumb and horsetail.
Also hawkweed and knapweed.
Indicating crust formation and/or hard pan: field mustard, horse nettle, penny cress,
moring glory, quack grass, camomiles, pine apple weed.
Weeds of cultivation (frequently spreading with manure and compost): lamb's
quarters, plantain, chickweed, buttercup, dandelion, nettle, prostrate knotweed,
prickly lettuce, field speedwell, rough pigweed, common horehound, celandine,
mallows, carpetweed and similar plants.
Frequent weeds on slightly acid soil (which may occur at the surface even
in an area with limey substrate) due to insufficient cultivation: daisies, horsetail,
field sorrel, prostrate knotweed
Very acid soil, mainly due to wrong cultivation and insufficient drainage: cinquefoil,
swampy horsetail. Hawkweed and knapweed also on 'wild' soils.
Salty soils: shepherd's purse, Russian thistle, sea plantain, sea aster, Artemisia
maritima.
Much potassium in the soil: Marsh mallow, wormwood, knapweed, fumatory, opium
poppy. Red clover disappears with a lack of potassium and increase in acidity
Absence of lime: yellow or hop clover, rabbits foot clover, fox glove, wild pansy (in
lawns), garden sorrel, sundews, white mullein, Scotch broom, black vetchling
(There's a WHOLE LOT more, including discussions of families of weedy plants.)
--
Pat in Plymouth MI
Any technology distinguishable from magic is insufficiently advanced.
(attributed to Don Marti)