Left-side rice radical — pictograph of grains of rice scattered around a central cross, the threshing-floor scene. The indexing radical, marking
粮 as a grain/food-supply character:
粮 covers all stored cereals — rice, wheat, millet — the bulk staples a household lives on. Same grain-family:
粒 grain-particle,
糕 cake,
粉 powder,
糖 sugar.