The following are said to indicate a sufficiency of potassium salts,
In moister soils.
Digraphis arundinacea.
Phleum pratense.
Avena pubescens.Arundo Phragmites.
Molinia cærulea.
Glyceria fluitans.In drier soils.
Anthoxanthum odoratum.
Alopecurus pratensis.
Agrostis alba.
Holcus lanatus.
Arrhenatherum.
Kœleria cristata.
Briza media.Dactylis glomerata.
Cynosurus cristatus.
Poa pratensis.
P. trivialis.
P. compressa.
Festuca elatior.
Lolium perenne.
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Digraphis arundinacea. Phleum pratense. Avena pubescens. |
Arundo Phragmites. Molinia cærulea. Glyceria fluitans. |
|
Anthoxanthum odoratum. Alopecurus pratensis. Agrostis alba. Holcus lanatus. Arrhenatherum. Kœleria cristata. Briza media. |
Dactylis glomerata. Cynosurus cristatus. Poa pratensis. P. trivialis. P. compressa. Festuca elatior. Lolium perenne. |
Grasses like Bromus arvensis indicate the existence of clay in the soil.
While the following are indicative of sand,In drier soils.
Aira caryophyllea.
A. præcox.
A. canescens.Festuca ovina.
Bromus sterilis.
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Aira caryophyllea. A. præcox. A. canescens. |
Festuca ovina. Bromus sterilis. |
And only if the sandy soil is moist and of better quality, owing to a certain proportion of humus, the following,