Abstract: This paper discussed the connotation， characteristic， guiding ideology， and development prospects of various patterns and types of contemporary and new-type agriculture， and analyzed the emergence background and principles of sus-tainable agriculture，ecological agriculture， organic agriculture， precision farming， construction agriculture， white agriculture， urban agriculture， quality agriculture， blue agriculture， natural agriculture， biological agriculture， bio-dynamical agriculture， intensive agriculture， and varieties of new-type agriculture. It was indicated that each of these patterns and types was pervasive and complementary with each other， and many of them paid more attention to rely on the cycle of agro-ecosystem itself and to the production processes be beneficial to the improvement and protection of ecological environment. These patterns and types of contemporary and new-type agriculture rejected to use contemporary chemical products， emphasized environment consciousness， neglected agricultural production function and income， and consequently， reduced product benefit and productiveness. Facing to the new problems of increasing population and decreasing tillable field amount， some of these agricultural patterns were difficult to apply widely. If the distillations of these patterns could be combined together， a contemporary agriculture with powerful activity would be formed， and represent the tendency of agriculture development in 21 century.

Key words: Rare earth elements, Crop, Relative seedling ratio, LC₅₀