1. What is your general approach to fertilizer?
2. What do you use, where do you get it?
3. How did you come to the decision to use what you use?
4. Are you rigid about organic gardening practices?
5. What is the approximate size and method (tilled rows/raised beds/container/etc)?
Bear in mind that I live in Ecuador.
1. The best fertilizer and fertilization methods are in well-enriched soil before planting. I tend to spend more time making sure I've got a good foundation, and then (with most crops, at least - I'll give you an explanation of bananas and papayas at high altitudes at the end of this post) add fertilizer only when it's time to rotate crops (ie postharvest). I topdress my fruit trees after harvest.
2. Marine algae paste (ag store), cuy droppings (neighbours), aged manure (friend's farm, tends to be a mix of cow, horse, and bunny). I've also got an active volcano about 25km from me, which provides me with a light dusting of very nutrient-rich ash from time to time.
3. For the algae, which is used with specific plants, it was the best low-dosage daily organic I could find. For the manures, it's what is least expensive and easiest to get ahold of - which sums up my entire country's philosophy of organic fertilizers.
4. About 99% of the time. When I have very bad mildew infestations on my tomatoes, I'll use a little copper sulfate, which breaks the rules but saves the plants.
5. I've got about 20 square meters all told; I do tiered beds for cyclical veggies, hilled planting for bananas, pineapples, and papaya (a guild pairing), and containers for herbs and tomatoes. I've also got established plum, peach, and citrus trees, which I had no say in planting and which are scattered throughout the garden areas. At the new house, I'll be scattering in the grand Incan tradition - a little bit of everything, intensively, and close together.
And now the note about bananas and papayas. At high altitudes, these survive best with continuous, daily feeding. This brought me to the use of soluble marine algae paste, which can be calibrated for the number of plants and then simply added to the day's water. Bananas and papayas are the only plants I feed daily - in all other cases, fertilizer happens after harvest.