Plastic nets are widely used in various agricultural applications: proetction form hail, wind, snow,sun burn, or strong rainfull in fruit-farming and ornamentals, shading nets for greenhouses and nets moderately modifying the microenvironment around a crop are the most common cases.
Moreover, nets for the ptotection against virus-vector insects and birds, as we as for harvesting and post-harvesting practices are often used.
The most widely used raw material for agricultural nets is high density polyethylene (HDPE). Polypropylene(pp) is also used as raw material for nets, mostly for production of non-woven layers.
Net types are characterized by different structural features like type of material. type and dimensions of threads, texture, mesh size, porosity/solidity and weight; by radiometric properties like color, transmissivity/reflectivity/shading factor; by physical properties like aire pemeability and by several mechanical characterisitics such as tensile stress, strength, elogation at break, and durability(Catellano and Russo,2005). Normally the available dimensions of nets vary a lot in both width and length. Widths usually vary from 1 to 6n or from 12 to 20m (depending on the type of net) and lengths from 25 to 300m. Wider nets are constructed by attaching the required number of nets in width. A first classfication of nets can be based on type of material, type of threads and texture, color, and additives used.
--from Sergio Castellano, Researcher, Dep. PRIME, Unibersity of Foggia, Foggia, Italy Giacomo Scarasia Mugnozza, Full Professor, Giovanni Russo, Researcherm Dep. PROGESA, University of Bari, Italy;Demetres Briassoulis, Full Professor, Antonis Mistriotis, Researcher, Department of Agricultural Engineering, Agricultural Univerity of Athens, Athens,Greece; Silke Hemming, researcher and Dries Waaijenberg, Researcher, Wageningen UR Greenhouse Horticulture, Wageningen, The Netherlands, Corresponding author: Sergio Castellano, Dep.PRIME. University of Foggia, Via Napoli 25,71100 Foggia, Italy
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