THE RELATIONSHIP BETWEEN NDVI AND CLIMATE ELEMENTS FOR 22 YEARS IN DIFFERENT VEGETATION AREAS OF NORTHWEST CHINA Variation Analysis of Growth Traits of Transgenic Populus simonii×P.nigra Clones Carrying TaLEA Gene Variation of rhizosphere environmental factors of sugarbeet seedlings under Na2CO3 stress and their correlation. A study on main agronomic traits of yield and quality of clone lines of Solanum tuberosum hybrids F1 A preliminary study on effect of feeding characters and quality traits inM1 of Lactuca indica by different mutation treatments