Under different plant density and fertilizer regime, LAI and LAD changed as a curve with a single peak, whereas NAR changed as a wide "V" during the whole growing season.
不同密度和施肥处理下，马铃薯群体LAI、LAD在全生育期内均呈单峰曲线变化，NAR呈阔U形曲线变化。
Mathematic models between yield and N fertilizer and plant density for two peanut variety types were set up by using quadratic saturation D-optimization design under single-seed planting.
采用二次饱和D—最优设计建立了精播条件下不同类型花生品种N肥用量和密度与产量的数学模型，探讨肥料与密度的产量效应及优化配置。
Single rope grab is an efficient tool for loading and unloading sands, coal, mineral powder and bulk chemical fertilizer.
单索抓斗是一种能在各种恶劣环境下取代人力从事黄砂、煤炭、矿粉、散化肥等散货装卸的有效工具。
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