Question 1
Which of the following soil conservation practices is most effective in reducing annual estimated sediment loss in United States?
◦ contour tillage
◦ vegetative filter strips
◦ permanent pasture
◦ 75% residue incorporation
Question 2
Which of the following would be a direct consequence of mixing air and plant residues into the surface soil with tillage?
◦ decreased nutrient mineralization
◦ increased aerobic microbial decomposition soil C
◦ increased water use efficiency
◦ decreased evaporation from the soil surface