| Variable | Organic fertilizer Coef. | P-free fertilizer Coef. |
| Environmental Knowledge and Attitudes | ||
| Knowledge of watershed | 0.390** | 0.344** |
| Importance of water quality | 0.097 | 0.422** |
| Concern about neighbors’ opinions | −0.198 | −0.100 |
| Trust env. group very much | 0.306 | 0.086 |
| Yard Management Behavior | ||
| Lawn fertilizing habits (base: 1 - 2 times) | ||
| No use of fertilizer | 0.753*** | −0.445 |
| More than 3 times | −0.391** | 0.091 |
| Lawn watering habits (base: infrequently) | ||
| As needed to keep lawn green | 0.209 | 0.286 |
| Never/severe drought | −0.111 | −0.029 |
| Use lawn care service (base: No use) | ||
| Mowing only | −0.918* | −0.018 |
| Chemical use | −0.333 | −0.390* |
| Hours spent on gardening/lawn | ||
| More than 10 hours | 0.481*** | 0.241* |
| Conducted soil test | 0.988*** | 0.958*** |
| Personal Characteristics | ||
| Male | −0.295 | −0.133 |
| Education (base: 4 yrs college degree) | ||
| High School degree or GED | −0.188 | −0.020 |
| 2 yr college degree | 0.514** | 0.304 |
| Graduate degree | 0.124 | −0.178 |
| Household income (base:$50,000 - $74,999) | ||
| $0 - $25,000 | −0.073 | −0.394 |
| $25,000 - $49,999 | −0.044 | −0.077 |
| $75,000 - $99,999 | −0.483** | −0.164 |
| $100,000+ | −0.231 | 0.022 |
| Homeownership | −0.038 | −0.395 |
| Where you live (base: Urban area) | ||
| Suburban area | −0.091 | −0.101 |
| Rural area | −0.008 | −0.412 |
| Information Source (Base: Extension/Professionals) | ||
| Not applicable | 1.454*** | 0.252 |
| Commercials | 0.113 | −0.040 |