Recursos para estudiantes de inglés de todos los niveles, profesores y traductores. Para aprender o mejorar tu inglés en forma divertida.
Listening Comprehension - Comprensión Auditiva

Cómo realizar este ejercicio de comprensión auditiva

- Siempre encontrarás una pequeña introducción, que puede ayudarte a comprender el tema tratado.

- En los textos presentados se han ocultado algunas palabras, que deberás escribir en los casilleros correspondientes. A medida que lees el texto, escucha el audio con atención para descubrir dichas palabras.

- Quizás puedes deducir las palabras sin necesidad de escuchar el audio. Pero, pon atención al audio para confirmar si realmente se trata de la respuesta correcta.

- Puedes escuchar el audio cuantas veces sea necesario. Pero es recomendable hacerlo solamente dos veces (o tres veces como máximo) ya que esa es la forma en que normalmente se realizan estos ejercicios en exámenes y pruebas internacionales.

- Comprueba tus aciertos pulsando el botón "Corregir". Si no has podido completar todas las palabras, pulsa el botón "Solución" para ver cuáles eran las que te faltaban.

Why 'Precision Agriculture' Is a Good Investment
Topic: Transcript of radio broadcast. Source: VOA

Escucha el audio y completa los recuadros.

This is the VOA Special English Agriculture Report.

Precision agriculture is a way of thinking about how to improve production and get more from existing resources. It often the use of technology. An example found mostly in wealthier countries is a computer-guided tractor. The computer does most of the driving. It uses signals from satellites in the Global Positioning System. GPS technology helps the tractor cut rows in straight lines and put the right amount of in the right place.

(SOUND)

Jimmy Messick is a farmer in northern , not far from Washington. He says the GPS guidance system makes it easy to come back later and plant the seed in his fields of maize, or corn.

JIMMY MESSICK: "Because the tractor that's pulling the planter also has the same auto-guidance system in it as the tractor that applied the fertilizer and did this , it will come back and put the seed right on top of these marks."

Because of the GPS guidance, Mr. Messick now pays what he once did for fertilizer.

Bruce Erickson is an agronomist at Purdue University in Indiana. He says saving even a little bit of seed, pesticide or fertilizer "computes directly to cost savings and less environmental ."

Raj Khosla is an agronomist at Colorado State University. He says farmers in the developing world can use precision agriculture even without high-tech tractors.

RAJ KHOSLA: "We do not necessarily have to have complex, large to practice what could be done as [simply] as using bottle caps."

The idea is to use a bottle cap to pour a measured amount of fertilizer right next to each plant. It takes more work than simply throwing of fertilizer across a field.

But Mr. Khosla says researchers taught this bottle cap method to farmers in sub-Saharan Africa. They discovered that it was the extra effort if they could only afford a small amount of fertilizer.

RAJ KHOSLA: "There was a huge difference: more than double, in terms of productivity."

Of course, new technology is not always so cheap. But Mr. Khosla says farmers could form a cooperative or combine their resources to pay for new equipment. He and other researchers worked with a farmer in India to precision-level his irrigated fields. That kept the fields from developing wet and dry areas that reduced productivity. The farmer also added better fertilizers and control.

As a result, he was able to grow almost three times as much wheat on the same amount of land. Mr. Khosla says with the extra money the farmer made, and a small , he bought his own precision leveler. And now, for a fee, he offers that as a service to his neighbors and other farmers.

And that's the VOA Special English Agriculture Report. I'm Jim Tedder.

Score:
   

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