Effects of low nitrogen stress on photosynthetic characteristics and chlorophyll fluorescence parameters of maize cultivars tolerant to low nitrogen stress at the seedling stage Biological Response of Roots in Different Spring Wheat Genotypes to Low Nitrogen Stress Selection of Rice Germplasm with High Nitrogen Utilization Efficiency and Its Analysis of the Related Characters Effects of low nitrogen stress on the physiological and morphological traits of roots of different low nitrogen tolerance maize varieties at seedling stage Indexes screening and comprehensive evaluation of low nitrogen tolerance of hybrid maize cultivars at seedling stage Effect of low nitrogen application and soybean intercrop on soil greenhouse gas emission of sugarcane field Biological response of different cultivars of millet to low nitrogen stress Quantitative Trait Loci Analysis of Responses to Nitrogen and Phosphorus Deficiency in Rice Chromosomal Segment Substitution Lines Transcriptome library construction in whole plant of Erigeron breviscapus stressed by low nitrogen and its sequencing Response of Roots of Maize Varieties Released in Different Years to Low Nitrogen and Drought Stresses Field Response to Low Nitrogen of Barley DH Lines from Microspores Mutagenesis and Culture under Nitrogen Stress Phenotyping for Abiotic Stress Tolerance in Maize Index screening and comprehensive evaluation of phenotypic traits of low nitrogen tolerance using BILs population derived from Dongxiang wild rice Effects of sugarcane-soybean intercropping on cane yield, quality and economic benefit under low nitrogen condition. Screening and evaluating low nitrogen tolerant wheat genotype at seedling stage Effect of Low Nitrogen Rate Combined with High Plant Density on Grain Yield and Nitrogen Use Efficiency in Super Rice Effect of low nitrogen stress on different low nitrogen tolerance maize cultivars seedling stage growth and physiological characteristics