List Newton's three laws of motion
1) an object in motion remains in motion, and object at rest remains at rest unless acted upon by an outside force 2) f=ma 3) for every action there is an equal and opposite reaction
List three helpful keyboard shortcuts in Excel and why they are useful
1) [Crtl] + [C] to copy 2) [Ctrl] + [V] to paste 3) [Ctrl] + [arrow] to select all the used cells in the chosen direction until there is an empty cell Copy and paste are frequently needed tools. Selecting a line of data in cells is extremely useful when writing equations such as sum or average
List a common cause and a solution for compaction on a cropped field
Compaction may be caused by frequent tillage, which breaks down soil structure and eliminates pore spaces. The problem is exacerbated by frequent driving of heavy equipment across the field and heavy rainfalls or irrigation, where loose soil fills remaining pores. This problem can be prevented by reducing the number of times a field is driven over and tilled or by planting deep rooted cover crops; ideally a combination of both.