"Net exporter" in terms of calories and protein or "net exporter" in terms of currency? The Netherlands ag economy is focused on high value crops. But you can't eat tulips.

One-third of the world's exports of chilis, tomatoes, and cucumbers goes through the country. The Netherlands also exports one-fifteenth of the world's apples.

Aside from that, a significant portion of Dutch agricultural exports consists of fresh-cut plants, flowers, and flower bulbs, with the Netherlands exporting two-thirds of the world's total.

https://en.wikipedia.org/wiki/Netherlands