He literally did. Read him. Malthus foresaw and mentioned the possibility of improved farming techniques. After all, it's not like improvements in farming hadn't happened before!

In reply to this predictable objection, Malthus..... well, I suppose you'll have to read it to find out. :)

https://archive.org/details/essayonprincipl00malt

thank you for linking to source material, but I don't think it's very useful to reply with teasers expecting us to read a book to understand one tightly constrained topic of conversation/debate.

Someone already answered that he in fact did foresee developments in food production but that is totally irrelevant to hist point which is: "The power of population is indefinitely greater than the power in the earth to produce subsistence for man"