THE EFFECT OF PESTICIDES DICHLORODIPHENYL TRICHLOROEYHANE (D.D.Y) AND BENZENE HEXACHRORIDE (BHC) ON THE MICROFLORA OF THE THREE TYPES OF SOIL.
1.2 Aims and objectives
1.3 Statement of problem
1.5 Limitation of the study
2.1 Pesticide labeling and safety
2.2 Various classes and types of pesticides.
2.3 Effects of pesticide on population of invertebrates in soil
2.4 Effects of pesticides on population of vertebrates in the soil
2.5 Effects of pesticides on population of micro organism in the soil
3.0 Materials and methods
3.2.2 Collection of pesticides
3.2.3 Collection of three types of soil loamy clay sandy
3.2.4 Preparation of media
2.2.5 Playing technique
3.2.6 Microbial count, staining and microscopic work
3.2.7 Identification of would
3.2.8 Biochemical test for identification
6.0 Conclusion and recommendation
According to crupta and Daroren (2003) soil is that portion of the surface of the land which is essential for plant growth. Plant are anchored in the soil by their root, which spread in all direction and which by holding on to the soil keep the plant in position plant draw all their water and most of their food or nutrient from the soil. Soil is therefore the source of food for plants, animals and man. Soil is of different types, sandy, clay and loamy soil. Sandy soil has or size range of 0.2 to 2mm diameter. They are free draining and do not retain any appreciable amount of soil water. It is brown loose and dry. While clay soil range in size from 0.002mm and lower and contains more than 40% of clay particles. They are sticky, plastic and easily moldable into shape. Another type is loamy soil which contains a fair balance of clay , silt and sand particle and it is the best soil for agriculture, as it has a high proportion of organic matter or content soil organic malter represents on accumulation of partially decayed and animal residues. Such material is continually being broken down as a result of the work of soil micro –organism consequently. It is a rather transitory soil constituent and must be renewed constantly by the addition of plant residues.
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