与 «CONTOUR PLOUGHING»相关的英语书籍
在以下的参考文献中发现
contour ploughing的用法。与
contour ploughing相关的书籍以及同一来源的简短摘要提供其在 英语文献中的使用情境。
1
Man, a Geomorphological Agent: An Introduction to Anthropic ...
Means of soil conservation include erosion control, such as contour ploughing,
strip cropping, ridging, and terracing. Ridging and terracing were discussed
above; the practice of contour ploughing, even though mentioned, merits a more
...
2
Soil Conservation and Management in Developing Countries: ...
3.2 Tillage Practices Tillage practices used for controlling erosion by water on
arable land include: (i) contour ploughing, (ii) crop rotation; (iii) mulching; and (iv)
strip cultivation. Contour ploughing is one of the early practices which has been ...
3
AD13E Water harvesting and soil moisture retention
7.1 Contour ploughing Contour ploughing ensures that rainfall and runoff water
are spread evenly over a field by making furrows parallel to the contours.
Conditions Contour ploughing may be done on slopes with a Water harvesting
and soil ...
Justine Anschütz, Antoinette Kome, Marc Nederlof, Rob de Neef, Ton van de Ven
4
Drought Management on Farmland
CONTOUR PLOUGHING Contour ploughing ranks high as a simple, cheap and
effective way of conserving rain where it falls, on slopes of about 2-8 per cent.
Both by increasing the roughness of the surface and by creating small retaining ...
Use contour ploughing Look at Figure 7. The top part shows that the ploughing
has been done so that ridges run down the hill. You can imagine what will
happen! (see Investigation 7.) In the bottom part of Figure 7 the ploughing has
been ...
M.B.V. Roberts, June Mitchelmore,
2000
One of the most widely used of such methods is contour ploughing, which
involves following the level of the land, rather than ploughing up and down
slopes in a manner that tends to channel runoff. The method can be
supplemented by ...
3 — winter crop, ploughing up and down slope, partial surface deposit, 4 — thin,
low clover, ploughing up and down slope, 5 — winter crop contour ploughing and
ploughing up and down slope, surface deposit, 6 — maize stubble and winter ...
8
Soil Tillage in Africa: Needs and Challenges
Much accurate (but site-specific) data are available for contour ploughing (
Hudson 1962; Elwell 1971; Elwell and Stocking 1988; IAE 1989-90; Vogel 1991a
). Typical estimated values of average annual losses of soil, water and nutrients
for two ...
9
Atlas of the Ethiopian Rural Economy:
Contour ploughing, whether by hand or using animal traction, can significantly
mitigate soil nutrient losses due to erosion. The steeper the slope of cultivated
land, the more important this practice becomes. Nationally, 44 percent of holders
...
Tadesse, Mulugeta , Alemu, Betre , Bekele, Gashaw,
2006
10
Soil Conservation and Silviculture
Data on the reduction of erosion intensity, the increase in the water reserve in the
soil and the reduction of surface runoff as a result of contour ploughing are all
shown in Tabs. 40 and 41. Table 40 Effect of the method of soil cultivation on ...