Summary of TUMGyS FCA UNER - Análisis de Calidad de Semillas - MUESTREO

00:00:00 - 00:15:00

This video from the TUMGyS FCA UNER laboratory explains the process of quality control for seeds. This includes taking a representative sample from the crop, testing for purity and germination, and then conducting final tests for cold hardiness and viability.

• 00:00:00 In this video, we will be discussing the quality of seeds, and specifically how to measure it. We will be discussing some concepts related to one of the key stages in quality assurance, and that stage is sample collection. Although not all laboratories have muestreadors, which are members of the laboratory who have taken the muestreo course and passed an approval muestreo, we will discuss how to identify an extractor of the sample, which is the person who will be taking the sample for analysis. Finally, we will provide instructions on how to conduct an analysis of seed quality. One of the key things to remember is that a sample is only a part of a larger lot. We need to be careful when identifying a sample as being representative of the lot as a whole. In addition, it is important to remember that a sample is just one piece of a big lot of material, and it must be representative of the whole lot in order to be considered a sample. We will also discuss some exceptions to this rule, and how presencial learning can help us overcome them. Finally, we will talk about the importance of lot uniformity when taking samples for analysis. Even if the conditions in a silo or bagseed storage facility are
• 00:05:00 The video discusses the importance of taking a sample from a crop, and how to do so. It goes on to discuss various types of environmental conditions that could affect the quality of the sample, and how to account for them when conducting a quality analysis. The presenter also mentions the concept of a primary sample, which is a sample taken from a particular portion of a lot of seeds. They explain how to make a sample composed of several primary samples from different parts of a crop, and how to send it to the laboratory for analysis.
• 00:10:00 This seed tester is placed directly in the flow of seeds, for example, in a silo. It separates and collects portions of the seeds passing through it, typical of climbers on the ground. These are typical altitude climbers, with a cylindrical rod with two branches, one within the other. This rod can be inserted and taken out, capturing the movement of the seed. Here is the case of silobolsa sampling. A vertical hole is made to insert the cala d'or, and generally recommendations are given on how to insert it. It is recommended to position it inclined and directed towards the center of the century. As we said before, what is recommended is to make several samples, without destroying the silo, but with the intention of capturing the maximum variability present in the lot. If we are working with two lots, we need to take two samples. The rest of the video provides links to videos on different types of sampling, the most fundamental of which is for seed storage in bulk. For field sampling, the most common is using automatic machines to work with large masses of material, and it is important to always seek a representative sample, capturing the maximum variability present in the lot. We take a sample of 1
• 00:15:00 This is a sample of the quality control process at the TUMGyS FCA UNER laboratory, in which the lab will test to see if the seeds received are in condition to be processed. The lab will also take into account the size of the lot, as well as the minimum size of the sample sent in for analysis. The lab will also perform an analysis of purity or of the number of seeds in a sample. Subsequently, they will conduct tests for germination, cold hardiness, and viability from cold. Once the quality control process is complete, the engineer or teaching staff member will perform the final stage of homogenization, which is called habitualization.