Its meaning and indicatrix clolny quality and its main culture measure will change when yield from low and middle to high,we must change concept,changing culture measure from amount to quality.
英
美
释义
当其产量由中、低产进入高产和超高产阶段以后,群体质量内涵、指标及其主要栽培措施发生变化,因此,应更新观念,从数量栽培向质量栽培转变。
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