kernel maturity

例句：

1. 1. The kernel maturity of the crop is a critical factor in determining its yield.
   作物的核成熟度是决定其产量的关键因素。
2. 2. The farmer carefully monitored the kernel maturity of the seeds to ensure optimal harvesting.
   农民仔细监测种子的核成熟度，以确保最佳收获。
3. 3. The company's research team has been working on improving the kernel maturity of their hybrid seeds.
   该公司的研究团队一直在努力提高他们的杂交种子的核成熟度。