Effects of fertilization and row spacing on microenvironment within population canopy and dry matter accumulation of waxy maize Analysis and assessment of heat resource for winter wheat northward moving during 1961-2001 in Shaanxi Province Diversity and isolation of potassium solubilizing bacteria in tobacco rhizosphere soils Effect of ecological environment on upper stalk leaves quality and neutral aroma components of burley tobacco Response of stomatal conductance to light in tobacco plants Hierarchical extraction of land cover information from fully polarimetric SAR image of coal mining areas Phytoremediation-a green approach to environmental clean-up Impact of climate warming on temperature and heat resource in arid Northwest China Effects of intercropping and accompanying anion fertilizer on Cd uptake by Brassica campestris L. Effect of basal nitrogen fertilization time on nitrogen fertilizer use in flue-cured tobacco Effect of fertilizer amount on yield and nutrient accumulation of green manures Effect of fertilization regime on tea yield, nutrient accumulation and soil fertility Regulation mechanism of irrigation schedule on population photosynthesis of winter wheat A summer maize dressing decision-making model based on effective accumulated temperature Effects of sowing date on tobacco yield and quality Effects of different fertilization schemes on growth, accumulation andtransportation of nutrient elements and yield of wheat in lime-concretedblack soil region Effects of enhanced UV-B radiation on basic chemical compositionsof two flue-cured tobacco cultivars Geochemical characteristics of typical tobacco-planting soils inZhangjiajie mountainous area Coupling effect of inorganic nitrogen and cabbage waste onsoil nitrogen mineralization Diversity of opportunistic fungi colonizing egg and femaleroot-knot nematodes of tobacco Effect of chicken manure with roxarsone on growth andarsenic accumulation in vegetables GIS-fuzzy neural network-based evaluation of tobacco ecologicalsuitability in southwest mountains of China Effects of long-term fertilization on As (arsenate) accumulation intypical fluvo-aquic soils and crops Effects of tobacco-cultivated soil extracts on tobacco growth and bacterial community diversity in rhizosphere soils Analysis of oat-straw salt ion accumulation and the potential for improvingsaline-alkali soils in coastal Hebei Province Allelopathic effect of Ageratina adenophora (Spreng.) leaf litter on four herbaceous plants in invaded regions Effects of long-term fertilization modes on spatio-temporal distribution and accumulation of soil nitrate nitrogen in solar greenhouse Research progress on tolerance of Indian mustard (Brassica juncea L.) to heavy metal Impact of controlled-release compound fertilizer on flue-cured tobacco leaf antioxidant system Influence of crop rotation on tobacco bacterial wilt number and pothogenesy Physiological response of Perilla frutescens (L.) Britt. to cadimium Nicotine accumulation and distribution in tobacco under continuous cropping Response of hedysari radix nitrogen absorption and polysaccharide accumulation to fertilizer application Characteristics and effects of climate warming on winter wheat/summer maize cropping system in recent 50 years in the piedmont of Mount Taihang Soil nitrate leaching and control methods in the piedmont of North China Plain Effect of soil factors on quality and style of flue-cured tobacco in Qujing District, Yunnan Province Effect of microbial organic fertilizer on seedling growth, yield and quality of flue-cured tobacco Effects of nitrogen on metabolism and dry matter accumulation of flue-cured tobacco before and after topping Temperature and relative humidity during air-curing and their effects on burley tobacco quality in different curing barns Effect of nitrogen application strategy in the first cropping rice on dry matter accumulation, grain yield and nitrogen utilization efficiency of the first cropping rice and its ratoon rice crop Field application of hyacinth (Eichharnia crassipes.), a strong nutrient accumulating plant A review on terrestrial plant acclimation to global environment change Spatial variability of soil texture in tobacco field Effect of incorporation of Astragalus sinicus on microbe and enzyme dynamics in tobacco cultivated soils Effect of N supply and wheat/faba bean intercropping on N uptake and accumulation of wheat Response of super hybrid rice “Y Liangyou No. 1” to N-fertilizer dose and its N use efficiency Factors affecting soil nitrogen supply in tobacco fields in Southwest Hubei Effect of UV-B on growth and development and secondary metabolism of flue-cured tobacco Effect of slow-release fertilizer on the root system and photosynthesis of flue cured tobacco Effect of fertilization mode on growth and nutrition accumulation in vegetables, and loss of nitrogen and phosphorus in vegetable fields Dynamic change in mineral elements and nicotine content of burley tobacco during plant growth and development Distribution and relationship of soil nitrogen and flue-cured tobacco nicotine content in Enshi tobacco fields Phosphorus accumulation characteristics and loss risk in vegetable garden soils of Shanxi Province Evaluation of land use sustainability in Qinghai Lake area Canonical correlation analyses of sub-suitable mineral elements and chemical composition of flue-cured tobacco leaf with soil ecosystem index in Nanyang Physiological and ecological effect of rhizospheric soil temperature on flue-cured tobacco Effect of dual-sunlight conversion film mulching on soil temperature, growth and physiological characteristics of tobacco Diagnosis of cotton N status using digital image analysis technique Effect of tobacco formulated fertilizer synergist on the contents of endogenous phytohormones and polyamine in flue-cured tobacco root system Uptake, translocation and accumulation of cadmium in plant Phytoremediation for heavy metal contamination in soil, metal hyperaccumulator and their genetic engineering Analysis of the physical and chemical characteristics of Fujian tobacco-growing soils Ecotoxic effects of rare earths in agriculture Distribution of soil medium- and micro-elements in Fujian tobacco-growing soils Polysaccharide content of different vegetative organs of longan plant (Dimocarpus longan Lour.) Effect of application rates of rape seed cake on yield and quality of flue-cured tobacco Interactive effect of genotype and environment on the genetic covariance of characterization of heavy metal accumulation in edible rice grain(Oryza sativaL.) The accumulating amounts of nutrient element in Trifolium pratense population in different utilization periods Effects of different fertilizer application countermeasures on the soil nitrate nitrogen accumulation in dryland maize. Sugars and sucrose-metabolizing enzymes in leaves of Lycium barbarum L. under salt stress Effects of crop residues incorporation and N-fertilizer utilization on the matter production of summer maize Effects of nitrogen application and remained leaves on the N uptake and nicotinc content of flue-cured tobacco Effects of different dehumidified treatments on tomato growth and nutrients accumulation inside greenhouses Current status and recent advances on the tobacco viruses Study on protected separation technique of active polysaccharides from aloe(Aloe babadensis Mille) Accumulating effects of sunflower (Helianthus annuus L.) on copper in soil Comparison research of growth development of high quality maize in Huang-Huai-Hai Plain Effects of spraying of fertilizer Mo on the agronomic and economic properties of flue-cured tobacco in Sichuan Province A quantificational study on the relationship between saccharide content of medlar and surrounding factors The development,current status and research trends of organic agriculture