Erosion control in the tropics - Part 7 pptx
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 ... crops,
Erosion control in the tropics 68
The purpose of gully control is not so much erosion control as an at-
tempt to limit the effects of erosion that is...
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 8 pptx
...
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 precautions. However, ... 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 mot...
Erosion control in the tropics - Part 1 doc
... for erosion control in the tropics
and sub -tropics 87
Appendix 3: Legumes; characteristics and utilization 90
Further reading 92
Glossary 94
Erosion control in the tropics 6
1 Introduction
Agromisa’s ... an insight into the causes and the course of the erosion
process, by stating the factors which influence the mechanism of
erosion and how thes...
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 ... keep the course of the erosion process in mind when looking
for signs of erosion in the field. When a certain characteristic is no-
ticed, one should ask oneself just w...
Erosion control in the tropics - Part 3 pps
... to the
plant- roots; hence crop growth is hindered and the water will run-off.
Figure 7: Splash erosion and crusting
In splash erosion, the force of the falling raindrops is determined by
the ... 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...
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...
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...
Erosion control in the tropics - Part 10 potx
... criticisms.
Erosion control in the tropics 84
The ends of the hose are fixed firmly to the lath. This can be done us-
ing part of an inner tube that is then fixed with U-shaped or L-shaped
nails. ... of the forces combining the parti-
cles within the soil aggregate are bigger than the forces of the sur-
rounding environment, thus keeping the soil aggregate...
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