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Biologic cultivation Agronomy - Horticulture ]
Syn: Organic or Ecologic cultivation

Dictionary of botanic terminology
index of names

     
  The biologic (or organic) cultivation is a method of cultivation which excludes harmful chemicals products and fertilizers for plant protection. The defence of farming (biologic agriculture) and cultivation occurs only with natural cultivation techniques.  
     
It is a whole production system for the agricultural and horticultural products that protects and respect the environment and - at the same time - the health of men.
Basic characteristic of the biologic agriculture is the absence of chemicals ,medicines for the plants and other same. Furthermore the biologic products have not inside them conservatives and other chemical substances.
The scientific principle of this method is based on the following practices: culture rotation, soil handling and fertilization. The principle that generates stability and health for plants is the handling of organic matter as the practice that guarantees good soil fertility and structure. Also the soil is considered as a "complex organism", full of living beings (worms, bacteria, fungi, ants, termites, etc) and mineral substances which are interdependent and constantly interacting, which means that in handling one aspect – fertilization, for instance – it is important to jointly consider all others (biological diversity, quality of underground waters, etc.). This is the principle of "systemic view" of agriculture (also called "holism"), which prescribes that the agricultural property should be considered in all its dimensions (productive, ecological, social, economic, etc).

Instead of biologic the terms ecologic, or organic, or organic-biologic, or biologic-dynamic can be used.
     

 


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Holdfast roots  [ Botany  ]

Dictionary of botanic terminology - index of names

 
     
  Some species of climbing plants develop holdfast roots which help to support the vines on trees, walls, and rocks. By forcing their way into minute pores and crevices, they hold the plant firmly in place.  
     
Climbing plants, like the poison ivy (Toxicodendron radicans), Boston ivy (Parthenocissus tricuspidata), and trumpet creeper (Campsis radicans),  develop holdfast roots which help to support the vines on trees, walls, and rocks. By forcing their way into minute pores and crevices, they hold the plant firmly in place. Usually the Holdfast roots die at the end of the first season, but in some species they are perennial. In the tropics some of the large climbing plants have hold-fast roots by which they attach themselves, and long, cord-like roots that extend downward through the air and may lengthen and branch for several years until they strike the soil and become absorbent roots.

Major references and further lectures:
1) E. N. Transeau “General Botany” Discovery Publishing House, 1994
   

 

 

 

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