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本刊1981年第2期封底,曾刊登山东省淄博市农业局设计的“小麦叶龄促控计算器”。该局现又设计出一种“小麦产量速算器”。两器大小相同,合并在一起,一正一反,一器多用。“小麦产量速算器”可以自行制作,制作方法见本刊封底。该器不仅可速测产量,还可速测基本苗、亩穗数等,现介绍如下: 小麦产量的速算:小麦产量是由亩穗数和穗粒重两个因素构成的。如果穗粒重(克)后只有一位小数,亩穗数(万)又是整数,则速算器上可直接显示出产量来。穗粒重±0.1克用来计算0.8—1.3克以外的数或
The second issue of 1981 back cover, once published in Shandong Province Zibo City Bureau of Agriculture designed “wheat leaf age control calculator.” The council also designed a “wheat yield calculator.” Two devices the same size, merge together, one positive and one negative, a multi-purpose. “Yield Calculator” can produce their own production methods, see the cover of this magazine. The device can not only speed measurement of output, but also rapid determination of basic seedlings, acres of spikes, etc., are described below: The calculation of wheat yield: Wheat yield is the number of ears per acre and grain weight two factors. If the grain weight (g) after only one decimal, acres of spike (million) is an integer, then the calculator can directly show the output. Spike weight ± 0.1 gram is used to calculate the number of 0.8-1.3 grams or more