yield per unit area的意思|示意

But many defects exist in the pear industry such as unreasonable varieties structure, low yield per unit area, the shortage of high quality fruits, poor benefit and so on.

但是，从整个梨产业结构来说还存在不少问题，如品种结构不合理，单位面积产量低，优质果少，经济效益差等。

Because of the diminishing opportunity to expand cultivated land, researches have been mostly focused on the rise of yield per unit area.

由于扩大耕地面积的可能性越来越小，研究已主要集中于提高单位面积产量。

This thesis study one of important factor in per unit area yield travel speed measure device and his sensor choice and relevant error analysis of form especially.

本论文重点是对单产的重要因素之一的行驶速度测量装置及其传感器形式的选择和相关误差分析进行了研究。

C. With a relatively stable cultivation area, China can achieve its desired total grain output target if the annual average increase rate of per unit yield is 1%.

在播种面积相对稳定的前提下，只要粮食单产年平均递增1%，就可以达到预期的粮食总产量目标。

We must protect primary farmland, keep the area sown to grain stable, improve the structure of grain varieties grown and increase the per unit area yield of grain.

要保护好基本农田，稳定粮食播种面积，优化粮食品种结构，着力提高粮食单产。

Increasing yield level per unit area is forever theme for rice breeding aim, and advancing photosynthesis efficiency is one of key factors for improving grain yield.

提高单位面积的产量是水稻育种目标永恒的主题，提高光合作用效率又是提高产量的关键因素。