胡桃施肥和灌水的试验是在1950年开始的。试验的种子从波德库莫克试验生产站采集的。1949年及1950年岩冬,该树一点也没有冻坏,并结实累累,当时.该边区其它地区大部分胡桃树遭受冻害,没有结实。从该树采摘的种子经过发芽以后,播种在各种施肥处理的试验地上。其施肥的作法有三:①每公顷施过磷酸钙和钾盐 Nut fertilization and irrigation trials began in 1950. The seeds of the test were collected from the Podekukog trial station. In the rocky winters of 1949 and 1950, the tree was not frozen at all and was strong, when most of the walnut trees in the rest of the border area were frostbite and were not strong. Seeds picked from the tree after germination were sown on various fertilization treatments. There are three practices of fertilization: ① per hectare applied calcium phosphate and potassium