New Taxa of Paspalinae and Paspalidiinae Karyotype Analysis of Three Species of Ceratoides (Chenopodiaceae) Macrocarpium (Spach.) Nakai Should Be Reaffirmed A Study on the Pollen Morphology in Trochodendron, Tetracentron and Euptelea Notulae de Plantis Tribus Cynarearum Familiae Compositarum Sinicae (II)(Cont.) Two New Species of Itea from China New Material of Carex Section Rhomboidales from China (I) A Taxonomic Study on the Fern Genus Polystichum Roth Sect. Metapolystichum Tagawa from China (I) (To be continued) A New Species of Arisaema Mart. (Araceae) in Yunnan A New Species of Hilliella (Cruciferae) from Anhui Paeonia qiui— A New Woody Species of Paeonia from Hubei, China Cladistics and Biogeography of Artemisia sect. Viscidipubes and sect. Albiraotea (Compositae) A New species of the Genus Tupistra (Convallariaceae), with Reference to Its Karyotype and Pollen Morphology Taxonomic Studies on the Nocturnal Flowering Group of Hemerocallis (Liliaceae) from China Morphological Studies on Anastomoses and Blind Veins in Dichotomous Venation of the Leaf in Kingdonia uniflora Floral Organogenesis in Saururus chinensis (Saururaceae) Notes on Cycas multipinnata C. J. Chen et S. Y. Yang Notes on the Genus Chesneya Lindl. ex Endl. (Fabaceae) New Taxa of Anoectochilus Blume (Orchidaceae) from China A Revision of Fritillaria L. (Liliaceae) in the Hengduan Mountains and Adjacent Regions, China(II) Geographical Distribution of Tilia Linn. On the Geographical Distribution of Arenaria L. New Taxa of Euglenophyta New Material of Volvocales from Wuhan, China A New Species of Pittosporum (Pittosporaceae) from Gansu, China A New Species of Gynostemma Bl.(Cucurbitaceae) from Guizhou, China A New Synonym of Kaempferia L. New Taxa of Carex Linn. from Fujian A note of Yinshania zayuensis and Camelina yunnanensis Critical Notes on the Genus Fritillaria L. (Liliaceae) of Xinjiang, China A Systematic Study on the Genera Stewartia and Hartia (Theaceae) A Review of Current Theories and Methods in Cladistics and a Cladistic Study of Twelve Lindera Species in Eastern China Taxonomic and Floristic Novelties in Chinese Umbelliferae from Qomolangma Region (Xizang, the Himalayas) Cycas debaoensis Y. C. Zhong et C. J. Chen—A New Cycad from China Karyomorphology and Relationships of the Genus Circaeaster Maxim. Two New Species of Elatostema (Urticaceae) from Yunnan, China Morphological Characters of Fruits in Damasonium (Alismataceae) and Its Taxonomic Significance Studies on Chromosomes of Eight Species of Allium from China Taxonomic Revision of the Sino-Himalayan Genus Cyananthus (Campanulaceae) Embryological Studies on Sagittaria guayanensis H. B. K. Subsp. lappula (D. Don) Bojin (Alismataceae) The Effects of Microgeomorphology on Soil Formation and Agricultural Utilization in Modern Yellow River Delta Material-flow Structure and Nitrogen-recycling Efficiency of Kangji Ecological Farm Microclimate in the Downland Region of Taihang Mountains and the Construction of Artifical Vegetation Ecological Functions of Diversified Farmland landscape Evaluation of the Functions of a Compound Agroecosystem The Obstacles in the Current Agricultural Development Macroscopic Features of Nitrogen Transformation and Cycling in the Agroecosystem in China and It‘s Implications to Ecological Agriculture The Quantitative Features of A Typical Agroecosystem and the Strategies for its Sustainable Development in the High Production Area in Taihang Piedmont Effects of Applying Molybdenum to Soybean and Intercropped Maize on the Increase of Nitiogen and Yield The Allocation Structure of an Eco-agricultural Resource-saving Model Correlative Analysis of the Relationship of the Comprehensive Exploitation the Rural Energy Resources and the Development of the Rural Economy in Huabei Plain Studies on the Regional Distribution of the Main Superior Pear Cultivars and Their Optimum Ecological Indexes in China The Development of the Wasteland and Its Optimum Scale Management--Hints from Developing Wasteland in Nanpi County,Hebei Province A Study on the Rooting Method of Test-tube Plantlet by Air-culture and Its Application to Industrialized Micropropagation Prospects For Agricultural Modernization in China--Modern Intensive Sustainable Agriculture Market Economy and Systems Engineering for Natural Resource Management A Discussion on the Eco-agricultural Ways for Comprehensive Agricultural Development in Huanghuaihai Plain The Vertical Climatic Habitat Zones in Mountainous Regions in South-western Hubei Province Light Distribution in Crop-tree Intercropping Area and its Agricultural Value The Effects of Crop Structure Adjustment on Agricultural Disaster Reduction Decision The Effects of Microorganisms on Eco-agriculture The Characteristics of Farmland Terra Nera Ecosystem A study on the Ecological Effects of Joint Pollution of Cd,Pb,Cu,Zn in soil Eco-agriculture Practice and Green Food Development in Liuminying Village The World Grain Production and the Agro-eco-environmental Changes The Application of the Artificial Neural Network to Forecasting the Epidemic Trend of the Cotton Boll Rot Evaluation of the Eco-environment for Chinese Chestnut By Gray System Theory The ecological significance of mineral nutrition in plants: II. The uptake,utilization and allocation of mineral nutrients by plants Tentative Ideas for Agricultural Development in Sandy Area in the Lower Reaches of Luan River A Brief Introduction to the Researches on Allelochemicals in Wheat Straw By the Theory of Ecological Economics to Promote the Development of the Ecological Agriculture in China The Prospect of Eco-agricultural Development in China in the Current Movement of the World Sustainable Agriculture Comprative studies of the Ecological Agriculture Between China and the Western countries The Ecological Agriculture and Its Development in China Characteristics of Ecological Agriculture Practice in Zhejiang Province Chinese Agricultural Modernization and the Analysis of the Eco-economy at Its Different Developing Stage A Tentative Idea About the Framevork of Eco-economic Theory Under the Adjustment of Market Economy A Study on the Obstructions,Regularity and Counter-measures of Sustainable Agricultural Development in China Biodiversity in the source regions of the Yangtse River, Yellow River and Lancang River Assessment framework and method of agricultural system resilience to drought——A case study of Xingtai City, Hebei Province