Things like vertical food farms, huge greenhouses, intensive farming help us become (one of) the biggest
- milk and milk powder producer
- apples (apples in South Africa are likely to come from the Netherlands)
- tomato’s in Spain come from the Netherlands
A quick Google search says Spanish yearly tomato production is 4x - 5x bigger than Netherlands'. I don't think your example, albeit possible, is correct.
Apples in South Africa are not likely to come from the Netherlands. SA exports about $736m in apples and pears, imports about $284k, not from the Netherlands.
It depends on what you count, as "agriculture exports" could (probably do) also include, apart from food items:
- Agricultural machines
- Seeds
- Agricultural patents on e.g. seeds
- Fertilizers
- non-food plants (flowers etc.)
- (Animal) vaccins
- other agricultural products processed ("produced") in the Netherlands
And if you count those by value, then it is certainly possible that NL gets a large share of world exports by value: other countries like Germany may produce more, but if they don't export the valuable products it won't show up on world export stats.
[1] https://wits.worldbank.org/CountryProfile/en/Country/WLD/Yea...
Such journalism...