Thanks for opinions/idea. It is the idea, idea-logies that lead to true progresses. Grand grand fathers&mothers sure have done many things that they themselves can be proud of. But I for one experienced in many fields am not proud of what they have done and what is being done. Relatively primitive technology being used in farm field proves that I am telling some truths It's not that farm technology is "absolutely" primitive. Primitiveness is a relative concept. It's better to explain what I am trying to tell by an example;
Take a big HP tractor and a luxury car of the same era, today. Do you think technology used in this tractor is as high as in this car? No. From materials to heating/cooling system to etc etc are different and the technology in that tractor is primitive "relative" to that of that car. Why? the reason is simple. Farmers have been considered 2nd/3rd/lower classes comparing to those who use that luxury cars. This is so today and also was so even in old days when these grand grandfathers&mothers have done contributions to the field. So, this "relative primitiveness" is a result of poor idea-logy we have seen for centuries, even at this so-called modern age.
I'll give more concrete example; (an example I just experienced). You know the efficiency of an internal combustion engine/tractor is not higher than 30%. If you add a turbocharge kit to the exhaust manifold of tractor, you can increase its efficiency 10% maxium, meaning that maximum efficiency can be increased to approx. 33%. But this turbocharger kit causes to increase the temperature, and exhaust manifold will have to be resistant to time dependent thermal stresses and thermal fatique may occur and that may cause some cracks in the manifold. So, the flow geometry, shape and material of this exhaust manifold with a mounted turbokit should be designed specially. A special alloy material should be used. I designed that and completed the work. Ok, so what? Okay, you will laugh if we call this as a technologic work. But, hey, this (Ni-based special manifold) is a NEW technology in tractor application although it has been applied in luxury car technology for decades. Therefore, I'm saying "technology in farm machinery field is RELATIVELY primitive." Did I make it clearer now;-)?