Agriculture

2. alternating crops grown in a location each season to prevent soil nutrient depletion
4. fertilizer made from manure or compost
6. raise animals in confined locations and create air and water pollution
8. farming method where flat areas are cut out of moutainsides slowing the velocity of water reducing erosion
9. uses perforated hoses to release small amounts of water to plant root
12. inorganic commercialized fertilizer
14. often used as cover crops as they fix nitrogen in the soil
15. this nutrient is the most important limiting factor in plant growth

1. crops planted in curving rows
3. trees planted around edges of fields prevent wind from eroding soil
5. these keep the soil covered reducing erosion
7. pesticide that kills target and nontarget species
10. soil is left alone and the remainder of the last crop decomposes into the soil
11. breaking up the soil which leads to erosion
13. least efficient form of irrigation
16. the three major plant nutrients