Match the following agricultural improvements.
a. separated cotton seed from cotton fiber
b. source of power for belt-driven machines
c. cut small grain
d. fencing wire with sharp points to discourage livestock from touching it
e. removed ears of corn from stalks
f. made of steel, allowed plowing of deep soil
g. cut and threshed grain in the field
h. replaced hand milking
1. reaper
2. cotton gin
3. moldboard plow
4. tractor
5. milking machine
6. corn picker
7. barbed wire
8. combine
Question 2Plant breeders developed a new technique called ___________________ ____ to develop hybrids and new kinds of Impatiens.
Fill in the blank(s) with the appropriate word(s).