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Row covers can reduce the drying effect of wind, and can provide a small amount of warming in a similar way to unheated cold frames, greenhouses and polytunnels, creating a microclimate for the plants. The first commercial-scale use of polyethylene row covers in the US was in the 1950s, and by the 1980s their use was widespread. [1]
Polytunnels are mainly used in temperate regions in similar ways to glass greenhouses and row covers. Besides the passive solar heating that every polytunnel provides, every variation of auxiliary heating (from hothouse heating through minimal heating to unheated houses) is represented in current practice. The nesting of row covers and low ...
The area of greenhouse cover is still increasing at a fast rate, during the last decade it is estimated that it has been growing by 20% every year. Areas such as the Middle East and Africa are growing in their use of plastic greenhouses by 15-20% per year, compared to the weak growth in more developed and economically stable areas such as Europe.
This greenhouse is fairly portable, with three tiers and 12 shelves that are encased in a PE cover. The house has roll-down mesh side windows and a roll-down door for access and airflow along with ...
Approximately 2,500 square miles (6,500 km 2) of agricultural land utilize polyethylene mulch and similar row covers for crop production in the world. Laying plastic polythene (mulch) down over mounds formed in the soil was also pioneered in New Zealand in the mid fifties by strawberry growers in the Auckland area. By 1960-61 all strawberries ...
Row cover material can be laid directly onto the crop (floating row covers), or laid over a framework of hoops or wires. Row covers can be set up outside of any protective structure or placed over crops within high tunnels or greenhouses. In its simplest function, it allows a light frost to form on the cover instead of on the leaves beneath.
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