Agricultural societies cannot exist without staple crops.
农业社会的存在离不开主粮作物。
Dutch agriculture was modernized and commercialized new crops and agricultural techniques raised levels of production so that they were in line with market demands.
荷兰的农业实现了现代化，新型的商业化农作物和农业技术提高了农产量，使之能够满足市场的需求。
Many crops were developed during the agricultural revolution when human societies made the transition from nomadic hunter-gatherers to horticulture and agriculture.
许多农作物的种植都是在农业革命期间发展起来的，当时人类社会正从游牧生活的狩猎和采集活动向园艺和农业过渡。
Saline soils, which have high concentrations of sodium chloride and other salts, limit plant growth, and research continues to focus on developing salt-tolerant varieties of agricultural crops.
盐碱地含有高浓度的氯化钠和其他盐类，限制了植物的生长，研究继续集中于开发耐盐的农作物品种。
The continuous and reckless use of synthetic chemicals for the control of pests which pose a threat to agricultural crops and human health is proving to be counter-productive.
为控制害虫，人们持续且不计后果地使用人工合成化学品，对农作物和人类健康造成危害，事实证明会产生相反的效果。
Now, only 3 percent of families follow the agricultural model, but nearly all schools are scheduled as if our children went home early to milk the cows and took months off to work the crops.
现在，只有3%的家庭遵循农业模式，但几乎所有的学校都安排得好像我们的孩子要早早回家挤牛奶，或者花几个月的时间种田一样。
The plan by the European Commission aims to fundamentally change how agricultural subsidies are handed out - and to give farmers more flexibility on what crops and how much they can grow.
欧盟委员会这项计划的目的是从根本上改变农业补贴的发放，并在种植什么作物和种植多少等方面给予农场主更多的灵活性。
Approximately half of the world's population relies upon biomass fuels - such as wood, dung and agricultural wastes - for everyday tasks such as cooking, drying crops and purifying water.
几乎半数的世界人口都依靠生物质燃料——木材，牛马粪便和农业废料等——来完成如煮饭，干燥农作物，净化水等日常生活活动。
Corn prices, which had risen after reports of poor crops elsewhere around the world, shot up further when a US agricultural report forecast that corn crops would be 3% down on last year.
在世界其他地方毂物欠收的报道陆续传出后，玉米价格就开始上涨。去年美国农业报告预测玉米收成将减少3%又让价格更往上涨。
Limitations on the consumption of genetically modified crops may seem an example of legal measures intended for the protection of domestic agricultural production.
对转基因谷物消耗的限制看起来将成为意图保护国内农业生产的法律措施中的一个典型范例。
Dry weather in parts of Europe is threatening production of key crops like wheat - at a time when the world is already battling high food prices and agricultural problems in other areas.
正当全世界各地面临高粮价和农业问题之际，欧洲部分地区的干旱气候已经威胁到小麦等主要农作物的生长。
Agricultural crops like corn and soybeans can be used for making ethanol for motor fuel.
玉米和大豆之类的农作物可以用来生产乙醇作为机动车辆的新型燃料。
In contrast, agricultural growth slowed sharply due to weak production of rice and some other crops.
与此相反，由于稻谷和一些其他谷物产出微薄，农业产出增长速度急剧下降。
Advances in agricultural technology—including, but not limited to, the genetic modification of food crops—have made fields more productive than ever.
农业技术的进步包括了改基因农产品，但并不仅限于此。
Rotate agricultural crops to prevent the sapping of nutrients.
不同的作物轮耕，以防止土壤养分枯竭。
The dark regions are mainly agricultural fields, with wheat and corn being the major crops.
而那些黑色的区域可能是农田，主要农作物产出的是小麦和玉米。
Much of the nitrogen pollution from agricultural production is linked to meat and dairy farming, as the crops needed to feed them are grown with the help of fertilisers.
由农业生产造成的氮污染大多数与肉乳品业相关，因为喂养动物所需的农作物需要氮肥才能生长。
After corn crops are harvested, a common agricultural practice is to leave discarded plant material on the fields.
玉米作物收获后，通常的农耕做法是将丢弃的植物秸秆留在地里。
Australia has produced some of its biggest agricultural crops in times of greatest drought.
澳大利亚在它最干旱的时期也生产出最大量的农作物。
The EU's executive Commission on Monday stood by its target of getting 10 percent of road transport fuel from crops and agricultural waste by 2020.
欧盟执行委员会在周一宣布了它将于2020年将其10%的交通运输燃油以农作物和沼气代替。
These Carolina parakeets, the only parrot native to the continental United States, once flew in large noisy flocks, feeding on agricultural crops.
卡罗莱纳长尾鹦鹉是美国本土的唯一一种本地鹦鹉，曾经结伴组成庞大的鸟群喧闹着飞过，以农作物为食。
These Carolina parakeets, the only parrot native to the continental United States, once flew in large noisy flocks, feeding on agricultural crops.
卡罗莱纳长尾鹦鹉是美国本土的唯一一种本地鹦鹉，曾经结伴组成庞大的鸟群喧闹着飞过，以农作物为食。
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