fixing atmospheric nitrogen造句

In this research project , the agrobacterium tumefaciens mediated transformation of badh gene of tetraploid black locust has been studied , for the purpose of improving resistance to soline - alkali and drought of tetraploid black locust ; of playing more important role in developing of waste lands , ameliorating of soline - alkali soil , and greening and beautifying of surface - mined lands , mine waste dumps , slopes of roads and railroads where restoration of vegetative cover has proven difficult ; of fully making benefits of its ability to fix atmospheric nitrogen in the soil
为了进一步提高四倍体刺槐的耐盐性和抗旱性，进一步扩大其适宜种植的生态范围，充分发挥其固氮、改良土壤的特性，在我国的城镇绿化、荒山造林、盐碱地改良以及采矿迹地、公路、铁路边坡等植物生长困难土地的植被恢复中发挥其优势，本实验对四倍体刺槐进行了农杆菌介导的甜菜碱醛脱氢酶基因转化的研究。
It's difficult to find fixing atmospheric nitrogen in a sentence. 用fixing atmospheric nitrogen造句挺难的