The third method looks for concentrations of indicator plant species in an area of interest.
2.
In irrigated areas, the species is known as a salinity indicator plant and is referred to as "'redweed " '.
3.
Virus indexing involves grafting a symptomless plant that is suspected of carrying a virus onto an indicator plant that is very susceptible to the virus.
4.
The cemetery is also listed as a City Wildlife Site, containing many indicator plant species for undisturbed neutral / calcareous grassland amongst the 110 + species identified.
5.
The beginning of the younger subatlantic at 1250 AD coincides with the medieval population increase and distinguishes itself by an increase in pine and in indicator plants for human settlements.
6.
Other indicator plants for sulfur and calcium, such as " Eriogonum inflatum " and " Oenothera caespitosa " help to identify likely areas also, especially in conjunction with the selenium indicators.
7.
An alternative means of describing plant hardiness is to use " indicator plants " ( the USDA also publishes a list of these to go with the hardiness zone map ).
8.
Consequently, many subtropical indicator plant species typically found in more southerly latitudes are grown there, including " Camellias ", " Ilex opaca ", " Magnolia grandiflora " and " Albizia julibrissin ".
9.
The establishment of beech and hornbeam was accompanied by indicator plants for human settlements and agriculture like cereals and plantain ( " Plantago lanceolata " ), at the same time hazel was receding.
10.
"These are indicator plants for growing ginseng, " said Scott Persons, whose book, " American Ginseng : Green Gold, " ( Bright Mountain Books, 1986 ) is a must for gardeners entering the complicated world of ginseng growing.
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