Sorry for pushing the logic but this doesn't account for the land, labour and resources required for the input which replaced former, less technical ways. How m

Sorry for pushing the logic but this doesn't account for the land, labour and resources required for the input which replaced former, less technical ways. How much is required to produce the seeds, seedlings, chemicals, energy and machines that weren't used before? In a really old approach farms tended to be fairly independant (e.g. producing their own fertilizers and using animal traction, animal who lived on the farm). This used land and labour which was accounted for but seems unaccounted for in more modern practice. In my opinion this underestimate the land and labour cost and creates a biased vision of the actual efficiency of modern agriculture.