| 标题 |
The effect of rainfall and soil factors on soil erosion II
降雨和土壤因子对土壤侵蚀的影响Ⅱ
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| 其它 | The COMET type 163 (φ = 5.5 mm) rain-gun was used to assess the effect of water drop impact and soil splash on a radish field during spray irrigation at a water pressure of 2.0-3.5 kg/cm2. The distribution of spray intensity, diameter of water drops, height of water spray, falling velocity and mean velocity of water drops were measured. It was found that water drop impact or soil splash had little adverse effect on the radish field at 18 days after seeding or at about 10 cm of crop height. Yields were affected, however, by water spray applied just after seeding.newline˜A type 183 (φ = 12 mm) rain-gun was used on a grass field at a water pressure of 2.0-2.5 kg/cm2. No adverse effects were reported. ll. |
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