un forte rumore di radici .60

Le misure della chioma di un albero mi danno i grammi di azoto che tale albero puo' rendere assimilabile alle radici delle piante intorno: una sorta di gioco matematico di cui rendo partecipe il Bosco.


   1 albero di ontano (in latino Alnus ed in questo caso glutinosa) vale 100mq di approvvigionamento di azoto. Il valore dato e': 1 ontano=10g(azoto)/mq(metri quadri di estensione della chioma). Una chioma generica (raggio di 2,5m) e' di 20mq=200g(azoto). Il Bosco non necessita di terreno ad alta fertilita', gli basta un'approvvigionamento di 2g(azoto)/mq: 200g=100mq. Risultato: 8 Alnus glutinosa riescono a fissare azoto per 800mq. Felici le piante intorno.


   Perche' poi si consideri l'estensione della chioma, se tutto questo avviene sotto terra nella regione delle radici dove si formano i noduli dei batteri azotofissatori, dipende dal fatto che le radici mediamente hanno uno sviluppo tale quale l'ampiezza (in mq) della chioma dell'albero. Occorre rispolverare il buon vecchio pi greco (3,14).

   ...

   Poter portare sul foglio di carta cose che esulano totalmente dal disegno e l'esperienza estetica che esso veicola e scoprire che quanto sopra mi sposta un po' piu' a destra la Parrotia persica ed anche il Morus nigra. Un calcolo mi sta ridisegnando il Bosco, non una suggestione formale, non un ricordo d'ombra, di umidita' ed esso acquista autosufficienza, quasi almeno, si muove un po', tutti gli alberi si muovono, ciascuno a modo suo, si aggiustano assestandosi davanti a me nella loro posizione piu' consona, in silenzio con il loro forte rumore di radici e fronde e torsione di tronchi. E poi, lentamente, si fermano, mi guardano ed uno di loro mi dice: "Hai capito?!".

   Era calcolo quello di Schonberg che diceva al suo allievo Webern: "Guarda le nuvole.", il calcolo che prende delle forme davanti a noi, in cui noi troviamo un senso inatteso ed e' la suggestione delle cose che non dipendono dal nostro linguaggio e che si articolano secondo una propria necessita' per poi apparirci ricche come mai avremmo potute immaginarle.

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"garden me" / A writing about a wished frontier for the natural gardening

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Ecological Planting Design

Ecological Planting Design

Drifts / Fillers (Matrix) / Natural Dispersion / Intermingling with accents/ Successional Planting / Self seeding
What do these words mean? Some principles of ecological planting design. (from the book: "A New Naturalism" by C. Heatherington, J. Sargeant, Packard Publishing, Chichester)
Selection of the right plants for the specific site.
Real structural plants marked down into the Planting Plan. The other plants put randomly into the matrix: No. of plants per msq of the grid, randomly intermingling (even tall plants). Succession through the year.
Complete perennial weed control.
High planting density. Close planting allows the plants to quickly form a covering to shade out weeds.
Use perennials and grasses creating planting specifications that can be placed almost randomly.
Matrix: layers (successional planting for seasonal interest) of vegetation that make up un intermingling (random-scattering) planting scheme: below the surface, the mat forming plants happy in semi-shade, and the layer of sun-loving perennials.
Plants are placed completely randomly: planting individual plants, groups of two, or grouping plants to give the impression of their having dispersed naturally. Even more with the use of individual emergent plants (singletons) that do not self-seed, dispersed through the planting.
An intricate matrix of small plants underscores simple combinations of larger perennials placed randomly in twos or threes giving the illusion of having seeded from a larger group.
The dispersion effect is maintained and enhanced by the natural rhythm of the grasses that give consistency to the design. They flow round the garden while the taller perennials form visual anchors.
Allow self-seeding (dynamism) using a competitive static plant to prevent self-seeders from taking over: Aruncus to control self-seeding Angelica.
Sustainable plant communities based on selection (plants chosen for their suitability to the soil conditions and matched for their competitiveness) and proportions (balance ephemeral plants with static forms and combinations such as clumpforming perennials that do not need dividing: 20% ephemeral, self-seeding plants, 80% static plants) of the different species, dependent on their flowering season (a smaller numbers of early-flowering perennials, from woodland edges, which will emerge to give a carpet of green in the spring and will be happy in semi-shade later in the year, followed by a larger proportion of the taller-growing perennials which keep their form and seed-heads into the autumn and the winter).
Year-round interest and a naturalistic intermingling of plant forms.
Ecological compatibility in terms of plants suitability to the site and plants competitive ability to mach each other.
Working with seed mixes and randomly planted mixtures.
Perennials laid out in clumps and Stipa tenuissima dotted in the gaps. Over the time the grass forms drifts around the more static perennials and shrublike planting while the verbascum and kniphofia disperse naturally throughout the steppe.
Accents: Select strong, long lasting vertical forms with a good winter seed-heads. Select plants that will not self-seed, unless a natural dispersion model is required.
Planes: if designing a monoculture or with a limited palette, more competitive plants may be selected to prevent seeding of other plants into the group.
Drifts: to create drifts of naturalistic planting that are static in their shape over time use not-naturalizing, not self-seeding, not running plants.
Create naturalistic blocks for the seeding plants to drift around. For the static forms select plants that do not allow the ephemerals to seed into them.
Blocks: use not-naturalizing species, in high densities, in large groups.
Select compatible plants of similar competitiveness to allow for high-density planting (to enable planting at high density in small gardens).
Achieve rhythm by repeating colours and forms over a large-scale planting.