Selasa, 03 Maret 2009

Garden Drainage

By Scott Edward

If you have taken over a new site and form of drainage is definitely needed, will at least provide an excellent opportunity to get rid of any builder's which you have inherited. Broken lumps of concrete should be used the bottom of drainage pits or trenches. The drainage systems is also useful to take the iorterflow and occasional outlet from a small garden pond.

Many waste materials can go on to the compost heap, from kitchen waste such as lettuce leaves and vegetable peelings to grass cuttings, dead leaves and straw- but diseased plant roots, perennial weeds or woody stems should always be burnt. The successful decomposition of this waste material depends on air, water and the action of bacteria. The bacteria depend on nitrogen for food and the rate of decay can be accelerated by sprinkling the heap with a nitrogenous fertilizer such as sulphate of ammonia or by spreading a layer of farmyard manure over it.

The water table generally rises and fa following wet and dry periods. If it star, at about 900 mm (3 ft) below ground le-. it can he an asset, since water will - available to the deeper plant roots. Ho ever extreme fluctuations in the water tai are a great danger: if it rises in winter: roots of plants are killed through saturatic and if it falls in the summer the pla suffer from drought. On low-lying grout if there is perpetual standing water (usua in winter), this might mean that the war table has risen above ground level and drainage system will relieve it.

Compost can be regarded as sufficiently decayed when the individual components can no longer be distinguished. It should be a crumbly, manure-like mass, dark in colour; if the texture is slimy the heap has not been made up correctly. In warm weather, and given the right conditions, the waste will take only about two to three months to decay but in winter you can expect it to take about four to six months. Artificial or inorganic fertilizers are concentrated chemical salts from natural underground deposits. They are available in liquid or powder form and supply essential foods direct to the plants, acting quickly when applied to moist soils; it is important to use the exact quantity stated and to distribute it as evenly as possible, as overdoses can be harmful. Fertilizers are available containing individual chemi- cals or you can buy a general one which combines the three main nutrients: nitrogen (N), phosphorus (P) and potassium (K).

This channel should obviously run to some form of outlet such as a soakawayon no account allow your excess water to drain on to neighbours' property. The disadvantage of a rubble drain is that it becomes blocked comparatively quickly as soil leaches through from above.

If you have space, a double compost bin allows one heap to decompose thoroughly while another is being started.

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