Screening of new combinations of resistant hybrid cotton to insect pests and evaluation of heterosis Analysis on variation of main economic characters in crossing offspring of sugarcane Morphological Variations of Eremochloa Ophiuroides and its Morphological Types THE APPLICATION OF SYNTHETIC INDEX METHOD ON SUPERIOR VARIETY SELECTION OF WALNUT Effects of nighttime temperature increase on physio-chemical properties, yield and quality of flue-cured tobacco in high-altitude region of Yunnan Province An Investigation on the Germplasm Resources of Chinese Torreyain Pan‘an County of Zhejiang Province Genetic Effects Analysis of Economic Characters in Momordica charantia Genetic Effects Analysis of Economic Characters in Momordica charantia Quantitative Analysis on the Economic Characters of Castanea henryi Nut Studies on soil Mg content and effects of Mg application in tobacco planting areas of Chongqing PRELIMINARY STUDY ON GROWTH CHARACTERISTICS AND SOME ECONOMIC CHARACTERS OF ARTIFICIALLY INDUCED TRIPLOID LOTUS THE HEREDITARY VARIATION AND SELECTION ON SUGAR BEET CHARACTERS Study on economic characteristics of biennial and annual upland cotton