Section I Introduction
Chapter 1 Challenges��constraints and strategies for rice production in China during transition period

Section �� Cultivar Selection
Chapter 2 Agronomic characteristics of high-yielding early-season rice cultivars grown under machine-transplanted conditions
Chapter 3 Physiological aspects of high grain yield in early-season rice grown under machine transplanted conditions
Chapter 4 Effect of delayed transplanting on grain yield in machine-transplanted late-season rice Implication for the importance of selecting short-duration rice cultivars
Chapter 5 Availability of existing early-season rice cultivars as resources for selecting short duration cultivars of machine-transplanted late-season rice
Chapter 6 Critical yield atributes contributing to high grain yield for early-season rice cultivars grown in the late season under machine-transplanted conditions

Section �� Technology Improvement
Chapter 7 Yield response of double-season rice to reducing nitrogen rate
Chapter 8 Efect of increasing hill density with reducing nitrogen rate on yield formation in machine-transplanted double-season rice
Chapter 9 Effect of single seedling per hill on yield formation in machine-transplanted hyrid rice under high hill density conditions
Chapter 10 Developing mechanically dense transplanting of single seedlings for double-season hybrid rice production in China

Section IV Cropping System Optimization
Chapter 11 Productivity of machine-transplanted double-season rice under three cropping systems
Acknowledgements