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一、碎土程度測定方法的改进碎土程度測定时的取样,篩分方法、表示方法等均有不同之处。在取样方面,虽然采样原則一致,但現行的取样法准确度却較差。在篩分样品方面,有在田間自然湿度下进行的,有在风干状态下进行的,也有在水中进行篩分的。至于篩分时的动力、篩分的时間、速度等却未涉及。基于上述存在的問題,幷根据近年来在这方面的工作,对碎土程度的測定方法,提出一些改进的意見,以供研究者参考。1.取样方法为了正确地反映不同因素的碎土能力,因此在取样測定时必須保持土壤处于天然結构状态。我們在工作过程中,設計了一个碎土程度取样器(如图)。
First, the improvement of the degree of determination of soil Crushing degree determination of the sampling, screening methods, said methods are different. In sampling, although the sampling principle is consistent, the current sampling method is less accurate. In the screening of samples, there are in the field under the natural humidity, in a dry state, but also in the water screening. As for the power of screening, screening time, speed, etc. are not involved. Based on the above problems, based on the recent work in this area, we put forward some suggestions for the improvement of the method for measuring the degree of soil crushing. 1. Sampling methods In order to correctly reflect the different factors of soil crushing capacity, so the sample must be measured in the determination of the natural structure of the soil. During our work, we designed a soil sampler (pictured).