Twenty years have passes since the young woman first noticed seeds growing in the midden and began to plant. Which of the following could now be true?
the group had been nomadic, moving frequently to gather wild foods and hunt, but are now more sedentary, growing crops
which of the following statements is TRUE about the Dust Bowl of the 1930's.
a combination of poor farming practices and extreme weather conditions contributed to the Dust Bowl
When surface water flows downhill and removes topsoil in uniform layers:
the breakdown of large rocks into smaller pieces is _________
affected by rainfall, freezing and thawing
according to the flowchart, it is true that overgrazing by cattle ________
increases the loss of topsoil
to make organic fertilizer by composting you do not include _______
wastes from butchering animals
the lesson learned by the Schroeder brothers on the Iowa farm is that __________
erosion and soil nutrient losses are reduced with no-till agriculture
_________ is NOT a soil forming factor
leaching and the rate of movement of water would be greatest in a soil classified as _________
pins driven into the ground level with soil surface, radioisotope studies and catchments are all tools used to measure ________
the horizon where leaching has deposited materials, is called the ___________
The younger women was watching the progress of a small rabbit as it hopped across the path and toward the clan's trash midden, where broken tools were tossed, and where discarded food was thrown. Green shoots sprouting across one side of the midden. She walked over to look, and she saw that some of last years dried fruits, which her neighbor had thrown away, were growing. Surprised and interested, she called her sister over to discuss this find. These people likely lived ________
at least 5000 to 10000 years ago
The younger women was watching the progress of a small rabbit as it hopped across the path and toward the clan's trash midden, where broken tools were tossed, and where discarded food was thrown. Green shoots sprouting across one side of the midden. She walked over to look, and she saw that some of last years dried fruits, which her neighbor had thrown away, were growing. Surprised and interested, she called her sister over to discuss this find. It is probably true that _________
until now, this group had not considered deliberately planting seeds
the loss of more than 10% productivity in arid areas due to erosion, soil compaction, forest removal, and an array of other factors is called ___________
the US agency charged with slowing soil degradation is the ___________
Natural Resources Conservation Service
The layer below the O horizon in an idealized profile is the _______ horizon
Shelterbelts are to ________ as terraces are to _________
wind erosion; water erosion
the conservation reserve program pays farmers to _______
stop cultivating highly erodible cropland
cation exchange is important for ________
nutrient uptake by the plant
agricultural practices, where the members of a farming family produce only enough food for themselves and do not make use of large-scale irrigation, chemical fertilizer, or machinery and technology, is called _________
plants with showy flowers typically ________
are pollinated by animals
the flavr savr tomato is no longer marketed because _________
people were nervous about eating genetically modified tomatoes
what is true about GM crops?
the US leads the world in land area dedicated to GM crops
honeybees are vanishing at an alarming rate because of _______
colony collapse disorder
the comparison shown in the figure is environmentally significant because _______
production of beef and pork is resource-intensive
the european union nations ________
do not support the growth or sale of GM crops
based on the information in the figure, you decide to make changes in your diet to diminish your ecological footprint by ________
shifting your protein intake from beef and pork to eggs and dairy products
which of the following requires the least land to produce 1 kg of protein?
which of the following is/are arguments against genetically modified crops?
GM crops, such as GM corn, can contaminate indigenous strains, as seen in Mexico
recent investigations about the impact of GM crops on biodiversity indicate that ________
some GM sites had increased biodiversity, while in others it decreased
In Queensland, Australia, cactus moths (cactoblastis cactorum) ___________
effectively cleared non-native prickly pear cactus from rangeland
can protect crops from pest-related losses when applied periodically
raising ______ requires the most land and water
the figure demonstrates that it requires roughly _____% more feed input to produce 1 kg of eggs, compared to 1 kg of milk
does not deplete soils faster than they form; does not destroy the biodiversity of the area; does not reduce the amount of clean water; maintains as much ecological biodiversity as possible in the agro-ecosystem essential to long-term crop and livestock production
Oaxaca, Mexico _______
is a world center of biodiversity for maize
Recombinant DNA ________
is the merging of DNA from unrelated organisms to create new genetic varieties
source of generic plasmids for genetically modified organisms
what was the impact of the green revolution?
increased crop productivity; increased carbon dioxide concentrations in the atmosphere; allowed some developing countries to begin exporting grains; increased the use of pesticides
can bring economic benefits and food security to many developing regions
what is the main problem of this article?
that if farmers can't regulate their water that their crops could suffer
why is it important to pay attention to the health of soil?
to avoid having to treat the soil with chemicals
what was the Meatrix about?
details about how animals are treated, cared for, and used for human consumption
what is another name for a factory farm?
concentrated animal feeding operation
how did the environmental protection agency define CAFO?
an operation that confines animals for a total of 45 days or more in a 12 month period
what year was the Food inc. video released?
why are pesticides not used on Four seasons farm?
healthy plants do not need pesticides
what does the UNEP stand for?
united nations environment programme
what bacteria is found in the digestive tracts of cows?
what causes soil depletion?
over grazing; over farming; under nourishment
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