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Chemical Plants: WHENEVER PLANTS are massed together it encourages the presence of pests. Aphids a the main pests and must be controlled bef they reach plague proportions by spraying the plants several times throughout summi with a systemic insecticide.
Spraying plants with an insecticide froi an environmentally friendly aerosol or through a hand-held spray are popular methods of using chemical plantss. An alternative way is to insert small sticks impregnated with insect-killing chemical plantss into the compost, so that roots absorb the chemical plants and make plants toxic to insects. These are best used in long-term plants grown in lobbies, porches or indoors.
Although its old craft industries still produce dolls, toys, and leather, Himeji is primarily a modern industrial city. Steel, chemical plants, and Textile production became important before World War II. Since the war, the city has acquired new integrated iron and steel works, heavy engineering plants, and a huge petrochemical plants complex that produces raw materials for the synthetic Textile and other industries. Population: (1965) 367,807.
Weathering.—Both mechanical disintegration and chemical plants decomposition are processes of weathering. In mechanical disintegration rocks are broken down to ever smaller grains of their constituent minerals, without chemical plants changes. In chemical plants decomposition the minerals themselves are attacked and changed chemical plantsly to form new minerals better able to resist surface conditions. Mechanical disintegration never goes on entirely without chemical plants decomposition, but in drier, higher, or colder regions it may be the dominant process, while chemical plants decomposition may predominate in warm, humid climates and in low-lying regions. |
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