Effect of different phosphorus levels on phosphorus nutrient uptake, transformation and phosphorus utilization efficiency of oil flax Effects of phosphorus sources on phosphorus fractions in rhizosphere soil of wild barley genotypes with high phosphorus utilization efficiency. Effect of Phosphorus Application Rate on Dry Matter Accumulation and Phosphorus Utilization Efficiency in Oil Flax Effects of Interaction between Phosphorus Nutrition and Cultivation Methods on Grain Yield and Phosphorus Utilization of Upland Rice and Paddy Rice Evaluation of the phosphorus nutrient characteristics of maize inbred lines at the seedling stage Effects of Nitrogen Application on Forage Maize Planted in Two Soil Types in Agriculture-Animal Husbandry Ecotone of North China Phosphorus utilization characteristics of forty spring maize hybrids with high-yielding potential in north of China