But they have a negative side – destroying crops and wiping out trees such as the ash and the elm.

Problems in and Countermeasures for the Production Link of Side Crops in China

我国小杂粮产业生产环节的问题与对策

African Farmers Growing Organic Foods for European Market African farmers are making more money producing organically grown crops for European markets, where demand for healthier food is growing.

欧洲市场对更加健康的食品的要求不断增长，非洲农民也从为欧洲市场提供有机作物方面获取更多的收入。

The case is different, however, when the State steps in and either buys the farmers'crops itself or lends them the money to hold the crops off the market.

然而，当政府介入这一过程，无论是政府收购农民的谷物，还是贷款给农民让他们囤积谷物，暂不上市销售，情况就完全不同了。

They argue that GM foods have never delivered on their supposed promise, that money spent on GM crops would be better channeled to organic farming and that consumers should be protected with warning labels on any products that contain genetically modified ingredients.

他们辩称,转基因食品从来没有兑现他们的承诺,用于转基因作物的资金应该流向有机农业,任何含有转基因成分的产品上都应该贴上警告标签，从而保护消费者。

A traditional farming technique that cultivates rice and fish side-by-side could help small farmers earn more money from their crops and reduce the impact on the environment, according to a study.

一项研究发现，一种同时种植水稻和养鱼的传统农业技术可能有助于小农从他们的农作物中获得更多的钱并减少对环境的影响。

One winter Eric had very little money. His crops had been very bad that year, and his living standard became very low.

一年冬天，埃里克没什么钱了，那年他的作物收成很差，因此生活水平也变得很低。

We're losing money. Our crops are dying. We can't support ourselves or our people.

财政困难庄稼枯萎我们都没办法养活自己和我们的人民

A study on the optimal harvest time of annual forage crops

一年生饲用作物最佳刈割期的研究

The study shows that there is a great deal effects of the annual crops on the growth of the perennial forages in the first and second year under the condition of lack of irrigation and the steppe climate on Qinghai Lakeside.

初步研究结果表明，在青海环湖地区草原性气候区土壤缺乏灌水的条件下，油菜对多年生牧草第1～2年生长的影响最小，其次是对燕麦、青稞的影响最大。

The citrus trees are woody perennials, unlike annual crops. It has unique natural features, and its production changes as the tree get older.

柑橘树属于多年生木本植物，不同于其它一年生的农作物，有其独特的自然特性，不同树龄段的产量差异性较大。

Sand fixation effect of annual crops mixed with perennial ammodyte cross-line

一年生农作物与多年生沙生植物混播网格的固沙作用

Developing and rolling out new higher-yielding strains is much easier and quicker for annual crops like wheat than for perennials such as palm trees that take time to mature and will bear fruit for many years.

开发和种植新型高产品种对小麦这种一年生作物会有立竿见影的成效，而棕榈树这种多年生植物需要很长时间才能到达成熟期并且数年之内都可产出棕榈油。

Liming is a traditional and effective method to amend acid soil. Previous studies mostly focused on annual crops, but rarely on the perennial fruit trees.

施用石灰是一项传统而有效的酸性土壤改良措施，而以往的研究多集中在一年生作物上，对于多年生果树研究较少。

Effect and Mechanism of Corn ∥ Potato-Cotton/ Vegetable Cropping Pattern

玉米‖马铃薯-棉花/蔬菜种植模式的效益与机理

The research of agronomic measure for cropping pattern in wheat and maize

小麦和玉米（20+40）cm种植模式农艺措施的研究

Different cropping pattern influenced the yield of maize significantly.

不同种植模式对玉米的产量也有显著影响。

Studies on High Yield of Wheat/ Corn/ Corn Cropping Pattern

小麦/玉米/玉米种植模式的高产研究

A study on ecological and economic effects of zoning cropping pattern for tea

茶树宽窄行排列种植法的生态经济效应

Innovating cropping pattern, increasing the efficiency of resource utilization;

创新种植模式，提高资源利用效率；

Methane Emission From Single Cropping Rice Paddies Amended with Different Manures

不同施肥处理的一季稻田甲烷排放量研究