Tag: chemistry

Pesticides are substances meant for attracting, seducing, and then destroying any pest. 
Herbicides are substances that is toxic to plants, used to destroy unwanted vegetation.
Insecticides are substances used for killing insects.
All the are used in agriculture and harmful to soil.

There should be sufficient duration between the harvesting of crops and time of last spray of pesticides.
It is a measure to control soil pollution.
This will help in reducing contamination of pesticides, directly to the crop. It will also cause less contamination of chloride and other chemicals to the soil.

Pesticides and fertilizers should be applied on croplands only in recommended dose, prescribed by Indian Standard Institution experts. It will help in reducing the level of water and soil pollution caused through these chemicals.

Soil erosion is controlled by: 
Using geotextiles is an effective method because it also stabilizes soil
The simplest and most natural way to prevent erosion is through planting vegetation.
Reducing deforestation and substituting chemical manures by animal wastes also helps arrest soil erosion in the long term.

The direct discharge of industrial waste into the soil causes the soil to erode and becomes useless for agriculture and any other purpose.

Waste water from industries should not be used for irrigation without eliminating toxic chemicals from the effluent.
It is a measure to control soil pollution.
This will also reduce the concentration of unwanted substances in the soil.

Industrial pollutants affect and alter the chemical and biological properties of soil.
With the advancing agro-technology, huge quantities of fertilizers, pesticides, herbicides and weedicides are added to increase the crop yield. 
Urban wastes comprise of both commercial and domestic wastes consisting of dried sludge and sewage.
all of them causes soil pollution.

Now-a-days, herbicides are frequently used in the place of pesticides. these are also chemical compounds such as $NaClO _3, Na _3AsO _3$ etc., has become more frequent but they are also toxic to mammals.

DDT is a pesticides which is used for pest control in agricultural production but not only pesticides decrease the fertility of the soil but also penetrate into crops and produce health hazards.

Pesticides are chemical compounds which are water insoluble and non-biodegradable.