Surface Predispose at www.japanese-home-gardens.com

Areas shut in by barriers to free air circulation, such as trees, shrubs and fences, are more likely to suffer from diseases than open places. Poor soil drainage, excessive acidity and wads of grass clippings left on the surface predispose to disease. Here we consider the more important lawn troubles, except grubs, which are discussed in Chapter 11. Here is a list of the pests you'll have to be concerned about: Ants make unsightly mounds on the surface and harm grasses by disturbing their roots. Chlordane, five percent, made into a water solution and poured into the burrows or dusted on the surface, gives effective control, or use ant baits such as Ant-X and.

One of the most important effects of ocean currents is that they mix ocean water and so affect directly the fertility of the sea. Mixing is especially important when sub-surface water is mixed with surface water. The upwelling [1] of sub-surface water may be caused by strong coastal winds that push the surface water outwards, allowing sub-surface water to rise up. Such upwelling occurs off the coasts of Peru, California and Mauritania. Sub-surface water rich in nutrients (notably phosphorus and silicon) rises to the surface, stimulating the growth of plankton which provides food for great shoals of fish, such as Peruvian anchovies.

The surface of Venus is a different story. Prior notions of very high surface temperatures were verified by the Soviet Venera 4 probe, which ejected an instrument pack that parachuted to the planet's surface in 1967, and by radio wave measurements of Mariner 5. Venera 4 showed a temperature of about 280°C (536°F) near the surface.