Spatial variation of soybean seed yield and nutrient requirement in Northeast China

Soils and climate influence soil nutrient supply, crop nutrient demand, and potential yield. We collected soybean [ Glycine max (L.) Merr.] data of seed yield and nutrient uptake from field students ( n = 657) in Northeast China (2001–2017) to study spatial distribution of attainable yield, yield response to fertilizer, and crop nutrient requirements at regional scale. The study area was divided in four weather regions based on daily average...