Answer:
Sensors that measure a variety of essential soil properties on the go are being developed. These sensors can be used either to control variable rate application equipment in real-time or in conjunction with a Global Positioning System (GPS) to generate field maps of particular soil properties. Depending on the spacing between passes, travel speed, and sampling and/or measurement frequency, the number of measurement points per acre varies; however, in most cases, it is much greater than the density of manual grid sampling. The cost of mapping usually is reduced as well.
Explanation:
B: Petroleum is the answer it makes up about 95% of the exports of Venezuela
Answer:
The European presence in America spurred countless changes in the environment, setting into motion chains of events that affected native animals as well as people. ... With their loss came the loss of beaver ponds, which had served as habitats for fish as well as water sources for deer, moose, and other animals.
Explanation:
