Soybean Seed Production and Nitrogen Nutrition

1. Introduction

2. Soybean seed yield

2.1. Potential of soybean yield

2.2. Characteristics of soybean growth

2.3. Factors affecting soybean yield

2.4. Nitrogen assimilation and seed yield

3. Characteristics of nitrogen nutrition of soybean

3.1. Characteristics of nitrogen nutrition related to seed yield

3.2. Nitrogen assimilation in nodules

3.3. Nitrogen absorption and assimilation in soybean roots

3.4. Comparison of the fate of fixed N2 and absorbed NO3- in soybean plant

3.5. Effect of combined nitrogen on nodule growth and nitrogen fixation activity

3.6. Nitrogen metabolism in soybean leaves

3.6. Assimilation of nitrogen in pods and seeds

4. Inoculation of efficient strains of bradyrhizobia to improve soybean seed yield

4.1. Inoculation of bradyrhizobia and indigenous strains in fields

4.2. Use of marker strain as an inoculant

4.3. Survival of inoculated gus-marked strain

5. Field estimation of nitrogen fixation activity and nitrogen absorption rate of soybean by relative ureide method

5.1. Concept of relative ureide method

5.2. Quantitative estimation of daily N2 fixation and N absorption rate

6. Possiblity of the agronomical use of hypernodulation mutant lines of soybean for promoting yield

7. A new fertilization technique to promote nitrogen fixation and seed yield

7.1. Nitrogen fertilization in soybean cultivation

7.2. Deep placement of controlled release nitrogen fertilizer coated urea

7.3. Deep placement of lime nitrogen

8. Conclusion

Author details

References