List of Articles Nutrient concentration Open Access Article Abstract Page Full-Text 1 - Assessment Effect of Different Irrigation Regime and Fertilizer Combinations on Seed Yield, Radiation Use Efficiency and Biochemical Parameters of Corn Mohammad Nasri Mansoreh Khalatbari Open Access Article Abstract Page Full-Text 2 - Comparison of quantitative and qualitative characteristics of two tall rice cultivars under different planting systems Morteza Siavoshi Salman Dastan Open Access Article Abstract Page Full-Text 3 - The effect of rotation and nitrogen fertilizer on yield and nitrogen, potasium and phosphorus concentrations in wheat Shahram Shoaei folora rafiei ali kashani