Your cousin is very excited to learn about annual conference for the "WA Tilth Producers" for many years the major organic farming organization in the state. She is confused by the organization's name and does not know what the word "tilth" means. Which of the following provides the best short definition?
1) The quality of soil in terms of its suitability for growing crops
2) The process of tilling the soil before planting
3) The practice of using organic fertilizers in farming
4) The study of organic farming techniques