Analysis of soil and plant nutrients in alfalfa fields in China Research advance on plant nutrition diagnosis based on spectral theory Effect of plastic film mulching on soil microbial biomass in spring wheat field in semi-arid loess area METHODOLOGY OF MODERN PLANT NUTRITION SCIENCE Nickel — A nutrition element for higher plant growth Effects of planting density on nutrition characteristics and yield of cotton The application of ion selective microelectrode in the study of plant nutrition Growth and Major Nutrient Concentrations in Brassica campestris Supplied with Different NH4+/NO3- Ratios Plant inomics: A new field in plant nutrition Application of cell-culture technique in plant nutrition science THE CURRENT STATE AND PROSPECT OF PLANT NUTRITION AND FERTILIZER SCIENCE