Seed sampling analysis Seeds are generally subjected to quality checks before sowing because if the seeds are of good quality at the time of sowing, their survival rate will be higher. In this way, a lot of trouble can be saved for agricultural operations. Seed quality inspection is a very important part, and the most basic step of quality inspection is sampling. This article will focus on sampling to analyze the principle and process of downsampling. The seeds of a seed lot can be considered infinite. Inspection is also destructive for seed particles. Therefore, the first important step of inspection is sampling. The sample must be fully representative. Otherwise, no matter how precise and accurate the inspection work is, the results cannot explain the entire batch of seeds. This is because there are differences in the size, severity, degree of maturity, degree of fullness, mechanical damage, and pest and infection among various seed particles in the seed group, and inclusions are included between them. There is a phenomenon of natural grading in the seed pile. When pouring or vibrating, smooth and rough, large, same, small, heavy, and light particles will be redistributed and recombined. Distributed in seed piles. The key to making the sample most representative is to understand this irregularity of the seed population and strictly abide by the sampling procedure. First, the sampling procedure The correct sampling procedure can be divided into two stages. The first stage is to extract the initial sample from several points randomly distributed in one species batch, fully mix to form a mixed sample, and the second stage is to extract a number of quantities from the mixed sample. Constitute the sample for inspection, and the inspection station will take samples from the sample one by one. The first stage is the basis for all sampling work, and the workload is large. It is best to carry out when the seeds are spread out in the air or when the container is poured out of the container. If not, it is necessary to sample from the container or sample it by hand. The second stage is actually a gradual reduction in the number of samples. It is best to use a sampler. The number of mixed samples should generally not be less than 10 times the number of samples submitted. The minimum amount of sample to be tested is usually specified according to the size of the seed. For example, it is generally required that the small and very small seed inspection samples contain at least 10,000 seeds, the middle particles have at least 3,000-5,000 particles, and the large particles and extra large particles have at least 300-500 particles. Therefore, for any tree species not listed in the Tree Seed Test Method, the minimum requirement for sample submission can be roughly calculated with reference to the grain weight. Second, species of batch A seed lot refers to a seed whose traits are generally consistent and can be tested, allocated, and stored as a unit. The general consistency of traits is a relative concept, and the scope of the range depends on the purpose and convenience of use. For example, in scientific research, when comparing the effects of different slopes on seed quality, seeds harvested from each slope should also be grouped into different types of seed. In production practice, as long as the source (origin and mother tree status), seed collection time, and production process are generally the same and the quantity does not exceed a certain range, it can be regarded as the same kind of batch. Therefore, the magnitude of the quantity of a species must be artificially defined. China's "Forest Seed Inspection Method" has stipulated the weight limit for seed batches according to the seed size. In general, the number of seed batches is too small, the production is inconvenient, and the larger the regulations are, the harder the samples extracted from them will be. In other words, the greater the ratification, the higher the demand for sampling. Each species lot should have a seed collection registration form. Each container of the same batch should be accompanied by a corresponding label. Wetness Indicator Adult Diaper Tena Diapers,Adult Nappies,Adult Underpads,Adult Pull Up Diaper Shandong Kangshun Daily Products Co., Ltd , https://www.centurybenifit.com