It is estimated that crops were being actively cultivated in Mexico ________ years ago.
6,000 - 5,000 years ago
Other options include 6,000-5,000, 28,000, and 3 million - 1 million.
Provide one example of an ecological externality provided by forest landowners.
One example is the provision of habitat for wildlife. When forest landowners maintain or protect forests, they create habitats for various species of animals and plants.
Which Department does the Natural Resources Conservation Service reside in?
United States Department of Agriculture
Currently, which of the following issues have the greatest impact on transporting food to malnourished and starving populations?
Social and Political
What is the driving factor behind the dietary shift to higher protein foods such as steak, pork chops, eggs and dairy products for developing countries?
Affluence
What are the steps in the scientific method?
- Identify the problem or question and make a hypothesis of the cause of the problem.
- Test the hypothesis by doing experiments.
- Check and interpret the results.
- Report the results.
The ideal soil consists of the following ratios:
50% solids and 50% pore space
____________is the most important soil characteristic to be considered before employing a plowing technique.
Tilth
What two dependent use criteria must be met before an exemption for Methyl Bromide will be issued?
Crop and Location
In which soil horizon does the greatest concentration of productive topsoil reside?
A
What occurs when vegetative cover is removed from the soil surface and directly exposed to the elements?
Soil erosion occurs, leading to potential depletion of organic material and compacted soil.
Explain how soil compaction impedes plant growth.
Soil compaction increases density, which decreases porosity and aeration, making it hard for moisture absorption and nutrient uptake.
Soil crusting results from the action of _________________.
Water droplets
The best strategy for remediating degraded soil is to ________________.
Add organic matter and soil microbes
In which of the 8 land classes can animal grazing occur?
2-8
Alkalinity is determined by the amount of ______________ present in the water.
Carbonates
Which agricultural practice has increased crop yields and reduced worldwide hunger more than any other practice?
Use of Fertilizers
A complete fertilizer contains which 3 macronutrients?
N, P, K
