Productivity increase in farming the last 150 years is an amazing process. Where in the early days of industrialization the absolute majority of the population in the western world were peasants, that figure is now down to a few percent of the workforce. With an ever increasing prosperity with following increase in intake of carbohydrates, fat and protein, the overall productivity increase figure gets even more astonishing. At least in the western world, famine is a horror of the past (at least for the time being).
With an increased degree of mechanization and with the introduction of basic chemical fertilizers, a great leap forward was done, but still farming was labor intensive and the main power source was horses and human sweat. Where horses where gradually phased out in favor of small tractors, the post-WWII development introduced high yielding crops, a new flora of chemical agents and an entirely new level of mechanization. Recent years giant harvesting monsters seen out in the fields certainly shows that the level of mechanization progresses with ever accelerating speed and determination. This process became known as the "Green Revolution", but given today's interpretation of the word "green" one can really ask how "green" this revolution was...
In the backwater of this development and aggregation of farming at the expense of small rural farms, abandoned farming equipment of various vintages is often spotted out in the countryside.