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在学习无产阶级专政理论运动的推动下,上海郊区群众性的科学实验活动蓬勃发展,科学种田水平不断提高,农业生产连年丰收,出现了一大批棉花高产稳产的社、队。为了总结高产经验,迎接农业大干快上的新形势,为普及大寨县贡献力量,我们试制了一种养分速测盒,采用纸上点滴比色法,测定棉株中氮、磷、钾的含量。通过二、三年
Driven by the theoretical campaign to study the dictatorship of the proletariat, mass scientific experiments in suburbs of Shanghai flourished, the standard of scientific farming continued to rise, and the harvest of agriculture in successive years showed a large number of clubs and teams of high and stable cotton yield. In order to sum up high-yielding experience, to meet the new situation of agriculture, and to contribute to popularize Dazhai County, we trial-produced a nutrient speed test box, using the on-chip colorimetric method, determination of nitrogen, phosphorus, Potassium content. After two or three years