12. _____________ should also be observed in saving our soils.
A. Sustainable water management
C. Sustainable food management
B. Sustainable fire management
D. Sustainable junk management
13. Soil is the basis of food systems as well as the place where all____ for food production grow.
A. Animals
C. Decomposers
B. Plants
D. Humans
14. During______
the soil volume shrinks and deep wide cracks form.
A. Wet periods
C. Snow periods
B. Sunny periods
D. Dry periods
15. Ultisols have a subsurface horizon in which clays have accumulated, often with_____
yellowish or reddish colors resulting from the presence of iron (Fe) oxides.
A. Weak
C. Strong
B. Balance
D. Available​