目前正鼓励农民兼种新的农作物。
这些昆虫可严重危害农作物。
长了小黄叶的作物需要一些悉心的照料。
农民们能用喷雾器来除草而不伤大豆作物。
Farmers can use the spray to kill weeds without harming the soy crop.
农作物定期喷洒杀虫剂。
把该技术扩延到其它农作物上也许是可能的。
It might be possible to extend the technique to other crop plants.
每年有10%的作物受损于一种叫做玉米根虫的害虫。
Each year ten percent of the crop is lost to a pest called corn rootworm.
他们从经济作物中得到的那些现金红利能支撑他们度过歉收季节。
The cash dividends they get from the cash crop would sustain them during the lean season.
他连续5年在同一块地上轮流种植不同作物，研究人员称之为轮作。
He grew a different crop on the same field five years in a row, what researchers call crop rotation.
我的目标是具有非洲价值的作物。
土壤侵蚀降低了他们的作物产量。
干旱地区需要灌溉才能使作物生长。
农业社会的存在离不开主粮作物。
他们吃农作物，蔬菜，甚至树木。
和牛羊一样，家畜也消耗了大量的农作物。
Livestock, like cows and sheep, also consume large amounts of crops.
水中田畦上的农作物肯定受益于周围的水。
The crops on chinampas definitely benefited from the water surrounding them.
许多农作物被霜冻坏了。
从粮食作物中生产一卡路里需要大约一升水。
It takes about one litre of water to produce one calorie from food crops.
生物多样性确保了新的粮食作物和药物的来源。
Biodiversity ensures a resource for new food crops and medicines.
日本人提供劳动力，农作物由劳工和地主瓜分。
The Japanese provided the labor and the crop was divided between laborers and landowners.
它谈论朋友和敌人，卡车和道路，农场和农作物。
It talks about friends and enemies, trucks and roads, farm and crops.
农民依靠种植作物为生，而牧民则依赖于驯养牲畜。
While agriculturalists rely on domesticated plants, pastoralists rely on domesticated animals.
除了种植替代作物，许多农民转向生产乳制品和牛肉。
In addition to planting alternative crops, many farmers turned to dairy and beef production.
它是最容易种植的作物，似乎对任何疾病都有抵抗力。
It is the easiest of crops to grow and is seemingly resistant to any disease.
这些新作物还必须具有更强的耐旱、耐热和抗虫害能力。
These new crops must also be more resistant to drought, heat and pests.
其概念是关于环境控制条件下种植粮食作物的多层建筑。
The concept is of multi-storey buildings in which food crops are grown in environmentally controlled conditions.
不同的农作物区或草场都在母体社区的几天步行范围内。
Different crop zones or pasturelands are located within a few days walk of the parent community.
已有充分的理由可以说明农作物为什么不使用干旱防御。
There are good reasons why crop plants do not use dryness defenses already.
他们的理由是，如果没有路，丰收的作物将只会烂在田里。
Their reason is that if there is no road, their bumper crop will just rot in the field.
几个世纪以来，农民们已经发现了数千种不同的粮食作物。
Over the centuries, farmers have discovered thousands of different species of food crops.
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