soil - a top layer of soil, which is characterized by fertility - the ability to grow plants to feed and promote their maturation.Agriculture is impossible without soil, because it is grown in the many cultures used to prepare food for the person and for livestock feed.Just how useful are these nutritional products depends on the quality and condition of the soil, from the care of her, feeding and watering.
most effective for agriculture are considered black soil rich in humus (humus).Soil formation - is a long and complex process, which is the result of exposure to wind and oxygen to the parent rock, the accumulation of decaying organic material.If there is even a slight contamination of the soil, it is restored for a long time.Therefore, you must carefully and take good care of the land.
Meanwhile, agricultural land as a result of lack of attention to him gradually lose fertility rapidly reduces the amount of humus.Man seeks to obtain from the soil as much as possible, without taking into account the need for proven alternation of crops on the same plot of land, "rest" of the field after a period of "labor."
Soil erosion can occur through no fault of the person, and the constant damaging effects of wind and water.Generally, soil erosion in recent decades has ceased to be only a problem of agricultural and gained scale environmental problem.
repeated treatments cause soil contamination.For many years on the same land randomly grow different cultures, without making the soil that it gives.It is logical that the soil is exhausted and can no longer fully perform its functions - supply plants nourished, filter waste and natural waters.
as long as possible to preserve the soil, you need a scientifically sound and rational approach to its use and cultivation to increase the fertility and get out of it clean and healthy food.To do this, you must comply with crop rotation, use of advanced scientific achievements, easy and efficient agricultural machinery, as little as possible to use chemicals, and instead used biological methods of farming
Chemical fertilizers and especially nitrate - a major source of soil contamination.By themselves, these substances are not harmful and can not be a source of poisoning, on the contrary - the plants use them for building cells, the formation of chlorophyll.However, accumulating in soil nitrates enter the food, and then - in the human body.Here, nitrates are converted into nitrites and can react chemically with the components of blood - hemoglobin.From this developing methemoglobinemia - a disease whose symptoms are manifested in the decrease in pressure, changing shades of the mucous membranes and skin, the formation of cardiac or pulmonary disease.
Equally important is soil contamination by oil products.This is particularly intense near the highways, gas stations, service stations, car parks.And in those places where oil is being produced, its processing, transportation, level of soil contamination with oil products exceeds the allowable ten times.
systematic removal of waste of different origin in landfills leads to inefficient use of land, can cause serious pollution of air, water, an increase in transport costs and, of course, irreversible loss of valuable minerals in the soil.
