这些句子怎么翻译成英语

Based walnut nursery production existence of low survival rate of grafting the outstanding problems through the use of field investigation, visit the forum, literature and other methods of Jiyuan three representative walnut breeding base for the survey, to understand, Jiyuan master walnut grafting and propagation of the status quo and a detailed introduction to the double-edged sword of Jiyuan Greenwood box budding law. Grafting breeding pairs of grafting techniques, ideas, management, government policy and other issues, a detailed analysis. To address these problems, the corresponding policies and measures.