建立有效的模型对臭氧造成的作物产量损失进行评估和预测，能为中国臭氧污染的控制和农业安全提供科学依据。
To build effectual simulation models to evaluate and predict the crop loss by O3 would help to the ozone pollution control and agriculture safety.
采用保持耕作措施，尤其免耕和深松，对于增加土壤蓄水、减少蒸发损失、提高水分有效性、节省能耗以及改善作物产量显示出最佳的效果。
No-till and subsoiling have shown promise in increasing water storage, reducing water loss, enhancing water availability, and saving energy, as well as increasing wheat yield.
介绍了农作物产量灾害损失评估业务化方法。
An operational method of crop yield disaster losses evaluation is introduced.
农业害虫给农作物产量和品质造成了重大经济损失，利用农作物抗虫特性，选育和种植抗虫品种是防治虫害最经济、有效的措施。
Agricultural pests have caused serious economic damage to production and quality of crops. The use of crops resistant to pests is the most economic and efficient measure in controlling pests.
酸雨对农业生态环境和农作物产量产生严重的影响，并带来巨大的经济损失。
It have been leaded to the serious impact of acid deposition on agri-ecological environment, product of crops and large economic losses by acid deposition.
本文采用求极值的数学方法，分别考虑了一次、二次作物产量函数。提出了不同产量函数下适时作业期限合理延迟天数的确定方法，以及依据作物产量函数计算适时性损失的方法。
A method to determine the reasonable prolongation of the proper operating time is proposed in this paper using the differential method according to the linear and parabolic functions of crop yields.
本文采用求极值的数学方法，分别考虑了一次、二次作物产量函数。提出了不同产量函数下适时作业期限合理延迟天数的确定方法，以及依据作物产量函数计算适时性损失的方法。
A method to determine the reasonable prolongation of the proper operating time is proposed in this paper using the differential method according to the linear and parabolic functions of crop yields.
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