weed-free
英 [wiːd friː]
美 [wiːd friː]
网络 无水藻的
双语例句
- Field experiments were conducted in paddy to study the functional relationships between the weedy or weed-free days and the yield loss rate of rice transplanted by throwing, and determine the threshold period of weed control in rice field.
通过多年多点试验，建立抛栽水稻大田立苗后有草天数或无草天数与水稻产量损失率之间的函数关系，以探明抛栽水稻田间杂草的生态防治阈期。