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Evaporation from soil accounts for 25-50% of water used in irrigation, using plastic mulch prevents much of this evaporation and thus reduces the amount of water needed to grow the crop. [8] This conservation of water makes plastic mulch favourable for farmers in dry and arid climates where water is a limited resource.
Plastic mulch, when used in vegetable gardening for a season can be useful, but also has many issues involved in its use. Use in other types of gardening, such as flower beds, is not a good idea ...
Mulch should not be piled around the stem of a woody shrub or the trunks of trees creating the look of a volcano. Keep the mulch at least two inches away from woody stems to prevent decay and disease.
Plastic mulch: crops grow through slits or holes in thin plastic sheeting. This method is predominant in large-scale vegetable growing, with millions of acres cultivated under plastic mulch worldwide each year. Disposal of plastic mulch is cited as an environmental problem but there are also degradable plastic mulches. [16]
In modern agriculture, drip irrigation is often combined with plastic mulch, further reducing evaporation, and is also the means of delivery of fertilizer. The process is known as fertigation . Deep percolation, where water moves below the root zone, can occur if a drip system is operated for too long or if the delivery rate is too high.
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Plastic mulch is a product used in plasticulture in a similar fashion to mulch, to suppress weeds and conserve water in crop production and landscaping. Certain plastic mulches also act as a barrier to keep methyl bromide , both a powerful fumigant and ozone depleter, in the soil.
Then, a top layer of organic mulch is applied. More elaborate sheet mulching involves more layers. Sheet mulching is used to transform a variety of surfaces into a fertile soil that can be planted. Sheet mulching can be applied to a lawn, a dirt lot full of perennial weeds, an area with poor soil, or even pavement or a rooftop. [3]
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