TAILIEUCHUNG - Dissertation for doctor of philosophy in agriculture: Study on the growth and development ability of some imported soybean varieties and cultivation techniques for prospect variety in Thai Nguyen

Research Objectives: selecting the imported soybean varieties that have good growth and development, are suitable with the ecological conditions of Thai Nguyen; determining some intensive cultivation techniques that are suitable for the prospect variety. | MINISTRY OF EDUCATION AND TRAINING THAI NGUYEN UNIVERSITY XUYEN THI LUU STUDY ON THE GROWTH AND DEVELOPMENT ABILITY OF SOME IMPORTED SOYBEAN VARIETIES AND CULTIVATION TECHNIQUES FOR PROSPECT VARIETY IN THAI NGUYEN Major AGRONOMY Code 62 62 01 01 DISSERTATION FOR DOCTOR OF PHYLOSOPHY IN AGRICULTURE THAI NGUYEN - 2011 RELATED PUBLICATIONS 1. Xuyen Thi Luu Dep Thi Luan Tam Minh Hoang 2008 Effect of planting season of soybean variety 99084 - A28 in Spring and Winter Crop in Thai Nguyen Journal of Science and Technology 3 47 - Vol. 2 2008 Thai Nguyen University Press pp 29 - 32. 2. Xuyen Thi Luu Dep Thi Luan Tam Minh Hoang 2010 Study on the effect of planting densities on the growth and development of soybean varieties 99084 - A28 in winter crops 2007 - 2008 in Thai Nguyen Journal of Agriculture and rural development October 2010 Press of Sciences and technology 18 Hoang Quoc Viet Hanoi pp 126 - 130. 1 INTRODUCTION 1. Background Soybean Glycine max L Merr is industrial and short growing - duration crop that is multi-purpose plant with high economic value. Its products supply food for human and livestocks they are also materials for processing industry and high valueable for exporting. Besides soybean plants are short growing-time crops that are very suitable for crop rotation intercroping crop overlaping with many other plants and soil improvement crop Dan The Ngo et al. 1999 10 . Soybean is popularly planted in all seven ecological areas over Vietnam. Northern midland and mountainous region has the biggest area 69425 ha which holds the total area of soybean in Vietnam but the lowest yield tons ha . There are many reasons for low yield of soybean in this region such as unavailability of high-yielding soybean varieties low investment and unreasonable cultivation methods. It is noted that lack of high-yielding soybean varieties and suitable cultivation techniques are the main limitation to soybean yield. The result of variety investigation in 2003-2004 of .

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