引进美国核桃良种简介１９８５年以来。我们相继从美国引进许多核桃品种，经多点高接试验。从中选出几个适应性强、丰产性好的优良品种，现简介如下，供生产引种发展参考：①契可：丰产，侧芽结果率达９０％—１００％，唯先型品种。坚果小，核仁单重５ｇ，缝合线紧密。核... Introduction of walnut varieties introduced since 1985. We have introduced many varieties of walnuts from the United States one after another. Select from a few adaptable, high yield good varieties, are briefings are as follows, for the introduction of the production of reference to the development: ① can: yield, lateral bud result rate of 90% -100%, only the first type. Small nuts, single nucleoli 5g, sutures close. nuclear...