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At present heavy metal pollution is serious in our county, the survey of national soil pollution situation by the Ministry of Environmental Protection 2009 showed that the grain polluted by heavy metals each year was up to 12 million tons in China, the direct economic losses were more than 200 billion.
The studies on Earthworm activities adjusted the pH value of soil were reported by Edwards and Lofty et al.(1977)[14-16],it raised the pH value of faeces of Earthworm that a larger number of ammonia could be secreted from Earthworm's digestive organs and CaCO3 be produced in the calcium Endocrine gland of Earthworm.

Additionally, there are also a number of individuals who have established small-scale industries in Afari and Mfensi communities, producing pottery wares such as water coolers, grinding bowls, palm wine pots, etc as well as burnt bricks using these clays as their main raw material.
Afari and Mfensi clay could be classified as sandy-clay and silty-clay respectively and both clays could also be considered as fine-grained soils that are ideal for stabilisation.

Although the mechanisms underlying this have not been fully clarified yet, these excellent properties are considered to be attributed to the refinement of 2H-Mg matrix grains, and the novel long period stacking order (LPSO) phases especially [2, 3].
The sites denoted by the numbers in (b) indicate occupation sites for substituted Zn and Y in single stacking fault layer.

This fact, when translated into grain or pore size in the range 1 to 100 nm, we have to deal with nano science phenomena.
For this reason, we should look for some other novel, no doubt sophisticated, means to achieve the trap concentration to this target number.

Fig.4 Magnification showing NbC particles with core morphology Once the solid nuclei of NbC forms, the growth of grain begins to occur.
Microstructure of the composite coating contains large numbers of fine NbC and M23(CB)6 hard phases, which are dispersed in the matrix of Ni alloy, giving very high microhardness of approximate HV0.2750.

This powder has a grain size between 15 and 45 μm.
This method was chosen to minimize the number of samples needed, considering that the intention is to study the influence of two parameters for correcting defects based on defect volume in three locations with two deposition strategies, resulting in 13 different parameter combinations plus 2 additional central parameters repetitions for each type of damage and for each deposition strategy.

Nassima Chaibi et al. experimented with two sets of categories such as, (i) ANN and RNN which had Information Gain (IG) as a feature selection along with (ii) Grain Ratio (GR) and Correlation Attribute (CA) were also used for feature selection.
When neural network have many hidden networks that can produce more number of increasing error rate by involving huge amount of network packets ratio of RNN is focused based on the error rate reduction.

The smaller the sequence number in the Table is, the greater the bond stress is.
Aggregates whose grain size ranged from 0.6 mm to 4.75 mm were used as filler.

Rafael M and other researchers[8, 26-28] found that CO2 uptakes were observed depending on the grain size distribution.
The shift to higher wave number indicates that the degree of polymerization of this group is increased.

Such processes however involve a number of operations before the electrolysis is conducted: i.e. first the recovery of TiO2 from its ore and then the conversion of the oxide to the halide, usually by carbochlorination.
SEM images of the dried powders showed very fine-grained metallic titanium (see Figure 5) with high oxygen contents Figure 5.