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.
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.
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。