Foram encontradas 50 questões.
A diagnose foliar é um recurso valioso para determinar as doses de fertilizantes a utilizar.
No sistema de análise de tecidos e de recomendação de adubação utilizado no Rio Grande do Sul e Santa Catarina, é correto afirmar:
Provas
O plantio direto tem sido adotado em áreas cada vez maiores do país. Esse sistema traz mudanças importantes no solo, que exigem a adoção de novas técnicas de análise do solo e de manejo da correção.
Analise as afirmativas abaixo sobre calagem em plantio direto:
1. Em plantio direto, aplicações de metade da dose recomendada na superfície têm se mostrado capazes de proporcionar altas produtividades da cultura.
2. As recomendações de calcário para calagem em plantio direto no Rio Grande Sul e Santa Catarina seguem a recomendação para atingir pH 5,5.
3. Em plantio direto, reaplicações da dose recomendada, a cada cinco anos e na superfície, têm se mostrado capazes de proporcionar altas produtividades da cultura
4. As recomendações de calcário para calagem em plantio direto no Rio Grande Sul e Santa Catarina baseiam-se no pH, no valor de V% ou no teor de Ca ou Mg do solo.
Assinale a alternativa que indica todas as afirmativas corretas.
Provas
Analise as informações contidas na tabela abaixo sobre a qualidade dos corretivos usados para a correção do pH do solo:
Características de três amostras de calcário, com respectivos valores de Poder de Neutralização (PN), Reatividade (RE) e Poder Relativo de Neutralização Total.
|
Amostra |
PN (ECaCO3) | RE (%) |
PRNT |
| A | 100 | 70 | 70 |
| B | 80 | 87 | 70 |
| C | 70 | 100 | 70 |
Adaptado de Alcarde, J.C. & Rodella, A. A. Qualidade e legislação de fertilizantes e corretivos. Tópicos Ci. Solo. 3:291-334, 2003.
Com base na tabela acima, e nos conhecimentos e legislação relativos a corretivos de acidez, assinale a alternativa correta.
Provas
Para correção do pH do solo, a calagem é a prática adotada com maior frequência no Brasil.
Sobre esse assunto, é correto afirmar
Provas
No Brasil são adotados diferentes sistemas para análises de solos, sua interpretação e recomendação de adubação.
Sobre esse assunto, é correto afirmar
Provas
O número de amostras (n) a serem coletadas para análise de solo é determinado pela equação
n = (\( t \alpha \) CV / f)2
em que \( t \alpha \) é o valor tabelado da distribuição de Student em determinado nível \( \alpha \) de probabilidade, CV é o coeficiente de variação e f é o limite aceitável de variação em torno da média.
Analise as afirmativas abaixo.
1. Um gráfico, tendo f no eixo horizontal e n no eixo vertical apresentaria uma curva quadrática descendente.
2. Em plantio direto o valor de n é maior que em áreas com solo mobilizado.
3. Um gráfico, tendo f no eixo horizontal e n no eixo vertical, apresentaria uma reta descendente.
4. Essas curvas variam pouco conforme a variável (pH, P, K e outras) avaliada.
Assinale a alternativa que indica todas as afirmativas corretas.
Provas
Text
Thinking the unthinkable
Today, it seems that no one is uninformed about the environment. Every day the media shows us more evidence of climate change: extreme weather, melting icecaps, and rising seas. Most of us believe we can do something to prevent global disaster, such as recycling, or conserving energy.
It’s strange to recall that, before the 1960s, few people knew of the damage we were doing to the planet. However, one scientist had already realized the dangers ahead. And today, this same man believes it may be too late to save the world.
In the 1960s, Professor James Lovelock came up with one of the most famous theories on the environment – the GAIA hypothesis. According to this hypothesis, the earth’s atmosphere, soil, and oceans work in concert to provide an inhabitable environment for humans. If we disrupt these elements too severely, the earth may one day become uninhabitable.
In the decade before he developed the Gaia hypothesis, Lovelock had created a device to detect atmospheric chemicals. With this device, he discovered particular chemicals, called CFCs. Later, other scientists discovered that these CFCs had damaged the earth’s ozone layer. Before then, we hadn’t knows about the hole in the ozone layer.
By 1979, Lovelock had put forward his theories on the environment, in his first book. At that time, few people believe him. Before scientists such as Lovelock publicized environmental issues, the environment hadn’t been a very fashionable topic. In 2004, after many people had only just started to accept the reality of global warming, Lovelock became convinced that climate change was irreversible. In 2006, he wrote another book describing his latest ideas. In 40 years, Lovelock believes large parts of the world will be desert. We will need to make synthesized food to feed the world’s population.
‘Is Lovelock right this time too? Surely we can prevent this nightmare, if we all recycle, use renewable energy, and travel less by plane and car? Lovelock disagrees. According to him, it is now impossible to reverse global warming. We did not act quickly enough when we had the chance. Renewable energy and recycling are a case of too little, too late.
Ultimately, if the human race is to survive, Lovelock believes we need to use more technology, not less. In his view, only nuclear energy can provide sufficient power for the planet. Now over 90 years old, Lovelock may not live to find out if he is right. But we will…
In the sentence:
“By 1979, Lovelock had put forward his theories on the environment, in his first book.”
The word “his” is used twice. In both cases it refers to:
Provas
Text
Thinking the unthinkable
Today, it seems that no one is uninformed about the environment. Every day the media shows us more evidence of climate change: extreme weather, melting icecaps, and rising seas. Most of us believe we can do something to prevent global disaster, such as recycling, or conserving energy.
It’s strange to recall that, before the 1960s, few people knew of the damage we were doing to the planet. However, one scientist had already realized the dangers ahead. And today, this same man believes it may be too late to save the world.
In the 1960s, Professor James Lovelock came up with one of the most famous theories on the environment – the GAIA hypothesis. According to this hypothesis, the earth’s atmosphere, soil, and oceans work in concert to provide an inhabitable environment for humans. If we disrupt these elements too severely, the earth may one day become uninhabitable.
In the decade before he developed the Gaia hypothesis, Lovelock had created a device to detect atmospheric chemicals. With this device, he discovered particular chemicals, called CFCs. Later, other scientists discovered that these CFCs had damaged the earth’s ozone layer. Before then, we hadn’t knows about the hole in the ozone layer.
By 1979, Lovelock had put forward his theories on the environment, in his first book. At that time, few people believe him. Before scientists such as Lovelock publicized environmental issues, the environment hadn’t been a very fashionable topic. In 2004, after many people had only just started to accept the reality of global warming, Lovelock became convinced that climate change was irreversible. In 2006, he wrote another book describing his latest ideas. In 40 years, Lovelock believes large parts of the world will be desert. We will need to make synthesized food to feed the world’s population.
‘Is Lovelock right this time too? Surely we can prevent this nightmare, if we all recycle, use renewable energy, and travel less by plane and car? Lovelock disagrees. According to him, it is now impossible to reverse global warming. We did not act quickly enough when we had the chance. Renewable energy and recycling are a case of too little, too late.
Ultimately, if the human race is to survive, Lovelock believes we need to use more technology, not less. In his view, only nuclear energy can provide sufficient power for the planet. Now over 90 years old, Lovelock may not live to find out if he is right. But we will…
About Professor James Lovelock, it is correct to state that:
Provas
Text
Thinking the unthinkable
Today, it seems that no one is uninformed about the environment. Every day the media shows us more evidence of climate change: extreme weather, melting icecaps, and rising seas. Most of us believe we can do something to prevent global disaster, such as recycling, or conserving energy.
It’s strange to recall that, before the 1960s, few people knew of the damage we were doing to the planet. However, one scientist had already realized the dangers ahead. And today, this same man believes it may be too late to save the world.
In the 1960s, Professor James Lovelock came up with one of the most famous theories on the environment – the GAIA hypothesis. According to this hypothesis, the earth’s atmosphere, soil, and oceans work in concert to provide an inhabitable environment for humans. If we disrupt these elements too severely, the earth may one day become uninhabitable.
In the decade before he developed the Gaia hypothesis, Lovelock had created a device to detect atmospheric chemicals. With this device, he discovered particular chemicals, called CFCs. Later, other scientists discovered that these CFCs had damaged the earth’s ozone layer. Before then, we hadn’t knows about the hole in the ozone layer.
By 1979, Lovelock had put forward his theories on the environment, in his first book. At that time, few people believe him. Before scientists such as Lovelock publicized environmental issues, the environment hadn’t been a very fashionable topic. In 2004, after many people had only just started to accept the reality of global warming, Lovelock became convinced that climate change was irreversible. In 2006, he wrote another book describing his latest ideas. In 40 years, Lovelock believes large parts of the world will be desert. We will need to make synthesized food to feed the world’s population.
‘Is Lovelock right this time too? Surely we can prevent this nightmare, if we all recycle, use renewable energy, and travel less by plane and car? Lovelock disagrees. According to him, it is now impossible to reverse global warming. We did not act quickly enough when we had the chance. Renewable energy and recycling are a case of too little, too late.
Ultimately, if the human race is to survive, Lovelock believes we need to use more technology, not less. In his view, only nuclear energy can provide sufficient power for the planet. Now over 90 years old, Lovelock may not live to find out if he is right. But we will…
The words: However and ultimately, are being used in the text as:
Provas
Text
Thinking the unthinkable
Today, it seems that no one is uninformed about the environment. Every day the media shows us more evidence of climate change: extreme weather, melting icecaps, and rising seas. Most of us believe we can do something to prevent global disaster, such as recycling, or conserving energy.
It’s strange to recall that, before the 1960s, few people knew of the damage we were doing to the planet. However, one scientist had already realized the dangers ahead. And today, this same man believes it may be too late to save the world.
In the 1960s, Professor James Lovelock came up with one of the most famous theories on the environment – the GAIA hypothesis. According to this hypothesis, the earth’s atmosphere, soil, and oceans work in concert to provide an inhabitable environment for humans. If we disrupt these elements too severely, the earth may one day become uninhabitable.
In the decade before he developed the Gaia hypothesis, Lovelock had created a device to detect atmospheric chemicals. With this device, he discovered particular chemicals, called CFCs. Later, other scientists discovered that these CFCs had damaged the earth’s ozone layer. Before then, we hadn’t knows about the hole in the ozone layer.
By 1979, Lovelock had put forward his theories on the environment, in his first book. At that time, few people believe him. Before scientists such as Lovelock publicized environmental issues, the environment hadn’t been a very fashionable topic. In 2004, after many people had only just started to accept the reality of global warming, Lovelock became convinced that climate change was irreversible. In 2006, he wrote another book describing his latest ideas. In 40 years, Lovelock believes large parts of the world will be desert. We will need to make synthesized food to feed the world’s population.
‘Is Lovelock right this time too? Surely we can prevent this nightmare, if we all recycle, use renewable energy, and travel less by plane and car? Lovelock disagrees. According to him, it is now impossible to reverse global warming. We did not act quickly enough when we had the chance. Renewable energy and recycling are a case of too little, too late.
Ultimately, if the human race is to survive, Lovelock believes we need to use more technology, not less. In his view, only nuclear energy can provide sufficient power for the planet. Now over 90 years old, Lovelock may not live to find out if he is right. But we will…
Choose the alternative that presents the correct meaning for the word “conserving”.
Provas
Caderno Container