Mr.Czudek says the loss of a maize crop can mean the loss of a family's food supply for a year.

VOA: special.2010.07.27

A lot of it can't produce the crop you would most like to grow.

大多数土壤并不能栽种出你最想要的作物

耶鲁公开课 - 古希腊历史简介课程节选

The reason for that is, if you are just engaged in a single crop farming, well you plant it, you take care of it, and then when the times comes you reap it.

其中的原因是,如果只是种庄稼,你先播种,接着你好生照料它们,然后成熟时收割它们

耶鲁公开课 - 古希腊历史简介课程节选

Professor Moseley said Malian farmers had planted more sorghum because the price of their cotton, a cash crop,had dropped.

VOA: special.2010.03.30

The electronics industry is hoping a new crop of products will help it recover from an eight percent decrease in sales last year.

VOA: special.2010.01.26

The seeds can also resist the Striga weed, a big cause of crop failures in Africa.

VOA: special.2009.07.07

When there is crop failure because of a drought or flood, farmers receive a text message.

VOA: special.2010.05.11

The forest provides a wood crop that helps pay the costs of operating the estate.

VOA: special.2009.11.16

The plant is a major source of food energy and a major food security crop.

VOA: special.2010.06.08

He says you can harvest parsley by cutting most of the plant, or leave more of the plant in the ground for a second crop.

VOA: special.2009.06.02

On-crop trees produce a large number of small fruit with little value.

VOA: special.2009.11.10

Dense planting of a crop can also act as a natural control.

VOA: special.2009.05.26

"I take it that most of your soldiers are small farmers and will need the horses to put in a crop that will carry themselves and their families through the next winter.

VOA: special.2009.12.24

"Kids really get engaged in science in the garden where it's a kind of fun activity where they're collecting data and seeing how different temperatures will change the amount of water that's needed by a crop, so the science concepts come easily."

VOA: special.2011.06.14

Almost a century ago, boll weevils destroyed two-thirds of the cotton crop in this region.

VOA: standard.2010.08.10

(Sound) As a large machine mashes the cotton into a solid brick a bit smaller than a train car, Pitt says her crop is destined for one of the world's most popular fashion items.

VOA: standard.2009.12.12

In 1944,when many experts warned of mass starvation in developing nations where populations were expanding faster than crop production, Borlaug began work at a Rockefeller Foundation-funded project in Mexico to increase wheat production by developing higher-yielding varieties of the crop.

VOA: standard.2009.09.13