The objective was to verify the uniformity of single superphosphate distribution among seeder-fertilizer rows and its consequences on crops. The experiment was installed in the municipality of Tibagi—PR, involving the following crop rotation in the same area: black oat (Avena strigosa) in 2012, corn (Zea mays) in the 2012–13 season, wheat (Triticum aestivum) in 2013, soybeans (Glycine max) in the 2013–14 season, black oat in 2014 and corn closing the cycle in the 2014–15 season. The experimental design was used in randomized blocks, considering the number of rows of the seeder-fertilizer (ranging from 11 for corn to 27 for wheat) as treatments; with three replicates. During the experimental period, 250 kg ha⁻¹ of single superphosphate were distributed per crop at sowing, with a mean deviation of up to 14% and variation in the fertilizer mass among the seeder-fertilizer rows in up to 52%. The variables evaluated were initial population and income components. It was concluded that it is not possible to correlate the variation of fertilizer distribution among rows of the seeder-fertilizer with the variables that presented significant differences in the crops through three agricultural seasons. This fact may be related to the alternation of the highest and lowest doses of simple superphosphate. Due to the succession of seeder-fertilizers used over the years to crops seeding, there was a compensation for the random variation of fertilizer among rows and crop spacings along the crop seasons.

目的是验证播种机-肥料行之间单一过磷酸钙分布的均匀性及其对作物的影响。该实验在 Tibagi-PR 市进行，涉及同一地区的以下作物轮作：2012 年的黑燕麦 ( Avena strigosa ) 、2012-13 季节的玉米 ( Zea mays )、2013 年的小麦 ( Triticum aestivum ) ，2013-14 季节的大豆（Glycine max），2014 年的黑燕麦和 2014-15 季节的玉米结束周期。试验设计采用随机区组，以播种机-肥料行数（从玉米 11 行到小麦 27 行）作为处理；三个重复。试验期间，250 kg ha ^-1播种时每株作物平均分布过磷酸钙，平均偏差高达 14%，播种机-肥料行之间的肥料质量变化高达 52%。评估的变量是初始人口和收入部分。得出的结论是，不可能将播种机-肥料行间肥料分布的变化与在三个农业季节中表现出作物显着差异的变量相关联。这一事实可能与简单过磷酸钙的最高和最低剂量的交替有关。由于多年来用于作物播种的播种机-肥料的连续性，随着作物季节的行和作物间距的随机变化，存在补偿。