玉米是大多数大田作物中缺氮的最好的指示植物。

Corn is one of the best indicators for nitrogen deficiency among the field-crop plants.

为了使这些大田作物能够安全越冬，防霜作业具有极端重要意义。

In order that the crops in open field could survive safely the winter frost prevention operation is of Paramount importance.

小麦之后大田作物最大的收入来自油菜籽、蔬菜、小麦、玉蜀黍、土豆、水果、烟叶和大豆。

After wheat, the largest cash receipts from field crops are obtained from canola, vegetables, barley, maize, potatoes, fruits, tobacco, and soybeans.

本文试从分散的材料中概括出主要大田作物繁殖器官被害与产量损失之间的一般关系。

This paper attempts to draw a general relationship between crop yield loss and chewing injury of reproductive organs by insect pests.