Polythene mulches

Some perermial weeds such as couch and docks can be difficult to control. One option is to introduce a fallow period and to keep cultivating the ground. If weather conditions are dry then repeated cultivations can be very effective at dragging the weed roots or rhizomes to the soil surface where they will dry out. A mulch such as black polythene is another method of weed control that can be very effective the problem is cost. Mulches are only economically viable for use on high value horticultural crops. Black polythene is usually laid using tractor-mounted equipment. Polythene mulches have to be removed after harvest occasionally they can be reused. Currently a number of biodegradable mulches, such as those made out of recycled paper, are being developed. 

Perennial weeds should be controlled prior to mulching and planting. Polythene mulching of raised beds can help to control weeds. Hand weeding of weeds from planting holes may be needed dming crop production. 

Sisal bulbils are raised in nursery beds with a spacing of about 25 x 25 cm. Bulbils may be preferred over suckers for planting. Bulbils or suckers can be collected about 6-8 months prior to the planting. The growth of bulbils is improved by mulching sisal nurseries with grass, paper or polythene. The sisal nursery needs... 

For the convenience of mulching the films are received from polyolefin introducing into the composition of photosensitive additives - iron and nickel dithiocarbamat or corresponding heroxides. With the purpose of acceleration biodecomposition of films on the basis of polythene for an agriculture, polypropylene pulp of cellulose is put into them [5]. 

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