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1986～1989年在全省芝麻产区布置了氮磷二因素试验102个。按区域类型划分成4大区，提出了各区的施肥模型及建议施肥量。
From 1986 to 1989, 102 nitrogen and phosphorus experiments were arranged in the sesame producing areas throughout the province. Divided into four regions by region type, put forward the fertilization model and recommended fertilization amount in each area.