THE EFFECT OF DAMAGE AFTER FLOWERING OF BROWN PLANTHOPPER ON THE DRY MATTER ACCUMULATION OF RICE GRAIN Effects of nitrogen fertilizer on chalkness ratio and cooking and eating quality properties of rice grain Regional distribution of rice grain quality in climatic transitional regions from north to south China Correlations between Rice Grain Shapes and Main Qualitative Characteristics A Half-Grain Method for Analyzing the Amylose Content in Rice Grains and Its Application Accumulation of Ca in different genotypes of rice grains and its relationship with other seven elements