subject area of Assessing risk associated with N fertilizer recommendations in the absence of soil tests Can Symbiotic Nitrogen Fixation be Extended to Rice Corralling, planting density, and N fertilizer rate effect on soil properties, weed diversity, and maize yield Drought response of dry-seeded rice to water stress timing and N-fertilizer rates and sources Durum Wheat Genotypic Variation of Yield and Nitrogen Use Efficiency and Its Components Under Different Water and Nitrogen Regimes in the Mediterranean Region Effect of algicides on urea fertilizer efficiency in transplanted rice Efficiency of fertilizer use by a rain-fed wheat crop following split-application of fertilizer nitrogen Genetic Variation for Nitrogen-Use Efficiency Among Selected Tropical Maize Hybrids Differing in Grain Yield Potential Genetic and agronomic contributions to yield gains: A case study for wheat Genotypic differences in symbiotic nitrogen fixation ability and seed yield of climbing bean. Grain legume rotation benefits to maize in the northern Guinea savanna of Nigeria: fixed-nitrogen versus other rotation effects Grain yield performance of rice genotypes at suboptimal levels of soil N as affected by N uptake and utilization efficiency High N fertilizer application to irrigated wheat in Northern Mexico for conventionally tilled and permanent raised beds: Effects on N balance and short term N dynamics Interpreting Treatment × Environment Interaction in Agronomy Trials LONG-TERM ASSESSMENT OF NITROGEN AND VARIETY TECHNOLOGIES ON ATTAINABLE MAIZE YIELDS IN NIGERIA USING CERES-MAIZE Mitigating Striga hermonthica parasitism and damage in maize using soybean rotation, nitrogen application, and Striga-resistant varieties in the Nigerian savannas NO, N2O, CH4 and CO2 fluxes in winter barley field of Japanese Andisol as affected by N fertilizer management Nitrogen rate impacts on tropical maize nitrogen use efficiency and soil nitrogen depletion in eastern and southern Africa Nitrogen-15 recovery fraction in flooded tropical rice as affected by Added Nitrogen Interaction On-farm testing of a nutrient management decision-support tool for rice in the Senegal River valley Opportunities for Coping with Climate Change and Variability Through Adoption of Soil and Water Conservation Technologies in Semi-arid Eastern Kenya Phosphorus agronomic efficiency in maize-based cropping systems: a focus on western Kenya Significance of timing and method of N fertilizer application for the N-use efficiency in flooded tropical rice