Effect of simulated acid rain on crops
1988
Kim, B.Y. | Kim, K.S. (Rural Development Administration, Suwon (Korea R.). Agricultural Sciences Institute)
Studies were carried out to examine the effects of simulated acid rain on the various crops of rice, pepper, tomato, pumpkin, eggplant, potato, soybean, radish, cucumber, common pea, sweet potato, corn, lettuce, Chinese cabbage, spinach, under the condition of the rains of pH 3.0. The rain was adjusted to pH 4.0, 3.0, 2.0 with sulfuric acid, and soybeans were exposed with the various pH levels, eighteen times every other day. The symptoms of damage, ratios of destroyed leaf and sulphur content by leaves were investigated. The exposure to the rain resulted in reddish brown or white pigment spots in the leaves surface and the colour developed red and darker along the edge of spots. Most crops were affected with acid rain of pH 3.0 at which the amount of chlorophyll decreased. Spinach, Chinese cabbage, lettuce were sensitive to acid rain, however, pepper, tomato, pumpkin were resistant to it. Content of chlorophyll decreased with increasing leaf injury. Sulphur content in leaves increased with increasing acidity of rain, however yield decreased
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