以下为句子列表：
英文: An optimum planting density must be employed to get a high yield, depending upon soil condition, varietal tillering ability, fertilizer level, number of plants per hill, and planting season.
中文: 获得高产必须采用最适植株密度，视土壤条件、品种分蘖力、肥力水平、每蔸苗数和播种季节而定。
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英文: Initial growth of crop stands can be easily obtained by an increase of planting density or by application of increased level of basal fertilizers.
中文: 作物苗的早期生长很易由提高种植密度或增施基肥获得。
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英文: The experiment of cultural techniques for attaining high yield contained three factors (hybrid, planting density and N application rate) each at two levels, which had eight treatments in total.
中文: 高产栽培技术试验包括三个因子（杂交品种、种植密度和施氮量），每个因子设2个水平，共为8个处理。
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英文: The planting density of 78,000 plants/ha had an average yield increase by 273 kg/ha with increase rate of 3.2% as compared with that of 67,500 plants/ha.
中文: 与种植密度67,500株/公顷比较，种植密度78,000株/公顷平均增产273公斤/公顷，增产幅度3.2%。
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英文: The results of the determination of solar penetration of various treatments in earring stage indicated that the percentage of solar penetration of Yedan 12was higher than that of Luyu 2whether in low or in high planting density and whether receiving low o
中文: 抽穗期对各处理测定光照透射率的结果表明掖单12的光照入射率高于鲁玉2号的，无论在低或高植株密度、施用低或高量氮肥，即使在密度78,000株/公顷时，玉米植株也能正常生长。
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