give short note soil conservation on mulching,contour barriers,rock dam,terrace farming,tntercroping,contour ploughing,and shelter belts
Answers
1. Soil Conservation
- Soil Conservation is a combination of practices used to protect the soil from degradation. First and foremost, soil conservation involves treating the soil as a living ecosystem. This means returning organic matter to the soil on a continual basis.Contour barriers are contour strips which intercept downslope flowing water and soil particles. These barriers slow down the water movement and reduce its erosive force. They also filter out and trap many of the suspended soil particles, keeping them from being washed out of the field.
Dams - Rivers constantly remove soil of their banks. Strong embankments of rocks so that it can bind the soil or by building dams along the banks can prevent the soil erosion by flooding.
mulching - Mulching is a soil and water conserving and weed management practice through soil solarisation also in which any suitable material is used to spread over the ground between rows of crops or around the tree trunks. This practice helps to retain soil moisture, prevents weed growth and enhances soil structure.
Contour Ploughing- Contour ploughing is a soil conservation technology that is practiced throughout Grenada to mitigate the negative consequences of natural disasters on soil quality and composition. It is performed by following the natural contours when tilling the soil, planting and cultivating.
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The Tyndall Effect is the effect of light scattering in colloidal dispersion, while showing no light in a true solution. This effect is used to determine whether a mixture is a true solution or a colloid.