diff --git a/frontend/src/app/rice-transplant/_components/RiceTransplantEditPage.tsx b/frontend/src/app/rice-transplant/_components/RiceTransplantEditPage.tsx
index 1d4ddf0..3921a57 100644
--- a/frontend/src/app/rice-transplant/_components/RiceTransplantEditPage.tsx
+++ b/frontend/src/app/rice-transplant/_components/RiceTransplantEditPage.tsx
@@ -124,10 +124,10 @@ export default function RiceTransplantEditPage({ planId }: { planId?: number })
     if (!seedMaterialId) return;
     const variety = getVarietyBySeedMaterial(seedMaterialId);
     if (!variety) return;
-    if (isNew || seedlingBoxesPerTan === '') {
+    if (seedlingBoxesPerTan === '') {
       setSeedlingBoxesPerTan(variety.default_seedling_boxes_per_tan);
     }
-  }, [seedMaterialId, crops, isNew, seedlingBoxesPerTan]);
+  }, [seedMaterialId, crops, seedlingBoxesPerTan]);
 
   useEffect(() => {
     const nextCalc: BoxMap = {};
@@ -524,7 +524,7 @@ export default function RiceTransplantEditPage({ planId }: { planId?: number })
                 <tr key={field.id} className="hover:bg-gray-50">
                   <td className="px-4 py-3 font-medium text-gray-900">{field.name}</td>
                   <td className="px-4 py-3 text-right tabular-nums text-gray-600">
-                    {field.area_tan}
+                    {Number(field.area_tan).toFixed(2)}
                   </td>
                   <td className="px-4 py-3">
                     <div className="flex items-center justify-end gap-3">