GIARDINAGGIO 56 GIARDINAGGIO buona porosità ed un drenaggio dell’acqua ottimale: indicate in questa fase sono la motozappa (per piccole superfici) o zappatrici abbinate al trattore per superfici più ampie. Prima della posa delle zolle bisogna distribuire ed interrare l’eventuale fertilizzante, per poi procedere ad un accurato livellamento della superficie, seguito da un’irrigazione, indispensabile per un pronto attecchimento. La disposizione delle zolle deve seguire uno schema che massimizzi l’attecchimento e riduca al minimo i possibili rischi di disseccamento o competizione con altre specie. Le zolle devono essere poste strettamente a contatto una con l’altra, per evitare che in eventuali zone scoperte si insedino infestanti, che creano discontinuità estetica. Lo schema classico prevede una collocazione delle strisce parallele al lato più lungo della superficie d’impianto, così da contenere al minimo il depezzamento delle zolle. L’ultimo intervento riguarda l’assestamento del cotico erboso, cui si provvede con una rullatura, per agevolare l’adesione delle radici al terreno sottostante, seguita da alcuni abbondanti adacquamenti ogni 2-3 giorni. Poiché di tratta di un prato trapiantato, è necessario attendere almeno una settimana (o anche più) prima di poter accedere alla superficie lavorata. Lavinia Eleonora Galli rection of travel) and an oscillating blade (single or double, depending on the model) that cuts the root system 3-5 cm below the surface. Everything is hydraulically moved. The length (adjustable that can vary from about 1 meter to more than 2.5 meters) of the sod is defined by an additional blade that descends with a guillotine effect to make the cut transverse to the direction of travel. After picking, the clods are loaded onto grated conveyor belts that convey them to the coiling unit, which consists of a pair of counter-rotating rollers, also grated, that allow constant pressure coiling of the clods. Finally, the rolled clods are moved to the rear of the machine, where a gripper arm piles the rolls onto pallets in opposing layers for later marketing. In the case of small harvesting areas, instead of opting for trailed or otherwise space-intensive machinery, it is possible to adopt more compact man-present-driven models (on par with motor cultivators and power tillers). These will provide the same result, although producing clods of a smaller width. It goes without saying that such machinery provides only for cutting clods through the blade placed ventrally to the machine that cuts the strips. Rolling will have to be done manually. Lawn laying in rolls Logically, it is imperative to prepare the laying soil thoroughly. Furthermore, turf placement should be done in spring or fall, thus taking advantage of the periods of greatest rainfall. It is necessary to remove or deeply bury the skeleton and proceed with careful weed control, which is essential to avoid undesirable competition between species. The soil must then be worked so as to ensure good porosity and optimal water drainage. The rotary tiller (for small areas) or hoes combined with a tractor for larger sizes are appropriate at this stage. Before the clods are laid, any fertilizer must be distributed and buried, and then the surface must be carefully leveled, followed by irrigation, which is essential for ready rooting. The sod layout should follow a pattern that maximizes rooting and minimizes possible risks of desiccation or competition with other species. Sods should be placed in close contact with each other to prevent weeds from settling in any uncovered areas, creating aesthetic discontinuity. The conventional scheme calls for putting the strips parallel to the longest side of the planting area so as to keep sod depeeling to a minimum. The last intervention concerns the settlement of the turf. This is done by rolling it to facilitate root adhesion to the underlying soil, followed by a few copious waterings every 2 to 3 days. Since this is a transplanted lawn, it is necessary to wait at least a week (or more) before accessing the tilled surface. Lavinia Eleonora Galli L’insieme di nastri e rulli grigliati del gruppo di avvolgimento delle zolle (sopra) e il braccio per la movimentazione dei rotoli (sotto) The assembly of belts and grated rollers of the clod winding unit (above) and the gripper arm for handling the rolls (below) Il prato a rotoli può essere facilmente adattato per coprire spazi dai profili irregolari Roll lawn can be easily adapted to cover spaces with irregular contours
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