Erosion control in the tropics - Part 1 doc
Erosion control in the tropics - Part 1 doc
... environment 15
3 The erosion process 17
3 .1 Splash -erosion and stream -erosion 17
3.2 Splash -erosion and soil condition 19
3.3 Stream erosion and the soil 21
3.4 An example on how to show the erosion ... erosion control in the tropics
and sub -tropics 87
Appendix 3: Legumes; characteristics and utilization 90
Further reading 92
Glossary 94
E...
Erosion control in the tropics - Part 2 docx
... clear that when observing the erosion phenom-
ena, the important thing is always to trace the causes of it. In the fol-
lowing chapters we will go more deeply into the erosion process,
which ... In road building too, steep side slopes often collapse in heavy
rainfall.
Erosion control in the tropics 16
it becomes too time-consuming or too expensive to use...
Erosion control in the tropics - Part 4 docx
...
Erosion control in the tropics 28
Removing this soil from the drainage system or the paths adds to
the workload of the farmer.
? The reverse applies of course to the field where the soil ...
labour and the farmer is obliged to sow up a smaller area for in-
stance.
? When thin layers of soil are continually washed away from the field
by erosion, the bigg...
Erosion control in the tropics - Part 6 doc
...
again. Burning is an integral part of cattle farming in the tropics and
improvements in the technique must be found. The timing and the
method of burning seem to determine whether it is damaging ... drinking places and in doing so they
trample down the soil.
During rain showers water collects in the trampled tracks (the rain
does not necessarily affect the str...
Pig keeping in the tropics - part 1 docx
... and vitamins 58
Pig keeping in the tropics 16
2.3 Small-scale intensive pig keeping
Figure 3: Small-scale intensive pig keeping (after Holnes, 19 91) .
Main characteristics
The main characteristics ... 'scavenging' pig keeping 9
2.2 Semi-intensive pig keeping 12
2.3 Small-scale intensive pig keeping 16
3 Housing 19
3 .1 Climate 19
3.2 Technical requirement...
Erosion control in the tropics - Part 3 pps
... of erosion is likely to occur.
3 .1 Splash -erosion and stream -erosion
Within water -erosion there are two types of erosion: splash erosion
and stream erosion. Certainly, they do occur at the ...
Erosion control in the tropics 20
Organic matter content of the soil
Organic matter probably is the most important factor in binding the
soil particles. The b...
Erosion control in the tropics - Part 5 pptx
... and at retaining the rain water.
? Minimum tillage, mulching and the use of a cover crops serve to
protect the soil against the force of the rainfall, at the same time
maintaining the soil fertility ... grassland influence arable farm-
ing. Think of the cattle pastures where manure will again benefit the
soil.
The felling of trees and the planting of trees also stron...
Erosion control in the tropics - Part 7 pptx
... drain
The main drainage serves as the main channel where all the water is
collected.
? One main drain at the bottom of the catchment area: all the col-
lected water ends up in the main drain ... Strengthening of a gully
Checkpoints for making dams
When laying out these check dams, the following points should be
taken into account:
? The principle is to shorten the...
Erosion control in the tropics - Part 8 pptx
... yourself why erosion occurs in a certain area. Not only will the
deeper causes of erosion be found in the socio-economic backgrounds,
but the incentive will be found which motivates the farmer ...
Underlying causes of erosion 73
8 Underlying causes of erosion
In the previous chapters we have seen how the chance of erosion can
be lessened by taking certain prec...
Erosion control in the tropics - Part 9 ppsx
... underestimated.
Erosion control in the tropics 76
9.2 Awareness
Only if people appreciate the usefulness of the operations to be carried
out, will they be inclined to take them up themselves. They should ... concerned or the well-intentioned development worker ei-
ther. Sometimes the causes can only be tackled by political influence
among the people themselves, a p...
Từ khóa:
- longman preparation series for the new toeic test part 1 doc
- the elements of style part 1 doc
- the end of time part 1 doctor who streaming
- beyond the basics part 1 php in expression web 4
- every time we encounter an esc or flag character we insert an extra esc character in the data part of the frame see figure 11 1
- radio frequency spectrum management in the uk part of region 1
- beyond the basics part 1 php in expression web 3
- how to prepare for the toefl part 1
- control in the rosetta translation system