The National institute of Agroforestry About keeping tree seeds with proper storage

Tree seeds normally have a shelf life of years depending on species. But it seems that the colder you keep the seeds the longer they survive. All the National institute of 12 Agroforestry, will conserved seeds after doing the following process. They first clean the seeds, meaning they remove all non essential parts of the seeds. On a maple you could think of the wings as nonessential, which once clean they are called dewinged. After cleaing all the excess residue, they proceed with a three phase testing routine. First, they will test for moisture, second they will determine the 1000 seeds unit weight and third they will do a germination test. The moisture content test is done with an oven. Two units of tree seeds of 2 grams each are placed in aluminum containers and placed in a convection oven at 103C for 16 hours. They determine the moisture content by taking the fresh weight minus the dry weight, divided by the fresh weitgh multiply by Nail Brush 100.The formula would be MC Fresh Weight Dry WeightFresh Weight100 The target moisture content for most seed is between 5 and 8. Seed that is above this range is further dried before being stored. The second step of three is determining the 1000 seeds unit weight. They dont usually count 1000 seeds, but they calculate the weitgh of 8 units of 100 seeds, calculate the average and multiply by 10. This calculation is helpful for distributor but also research wize, because it can give an indication of variation in seed size year over year. The third step is to make a germination test. This will determine the seed health and viability. First, they are place in a dishbox. The bottom of the box is covered with Kimpak, a germination paper made with regulatory requirements for industrial germination. The kimpak is moisten with water. They usually do four 4 groups of 50 seeds per dish. They then slide the tray in a rack store in a controlled temperature environment. The temperature is 8 hours light at 30C and 16 hours darkness at 20C with a constant humidity of 85. Once these steps are done, they can now conserve the seeds. There is four levels of seed conservation. The last two ones are the one used by national institute. It seems the colder it is, the longer the seeds will remain viable. The first level is storing the seeds at ambient temperature. Second level is to store at fridge temperature, wich is usually 46 degree celscius. Third level, is to froze at 15 degree celscius, this method will permit the seeds to remain viable for decades if the moisture level of seeds is no more then 8 but not lower then 5 at time of freezing. Normal practice is to froze seeds at 20 degree celscius. Fourth and last is the costiest method but the most efficient. It is called cryoperservation method. Seeds are frozen at 196 degree celsicus in liquid nitrogen. This method is often used by research entities like government or national orginatisation. This method will keep seeds viable for several hundred years. Motorcycle Gloves For a normal person, the best way to store seeds is to keep them in a plasticglass jar in the veggie fridge compartment.