The question is very interesting and difficult. There is no definite answer to it.. If we consider it in terms of our country, then the problems lie in the distant twenties of the last century. I think so. In the Soviet countryside, collective management of agriculture was imposed and strong individual farmers, who were called "kulak" (fist), were destroyed.
A collective form of management is like group sex, sometimes you can do nothing, but watch from the sidelines as others work. It's a joke, but it's true.
Someone believes that Nikita Khrushchev killed agriculture in the USSR with his transformations. Someone accuses Mikhail Gorbachev of destroying the Soviet system and opening the borders of the closed Soviet World, which began to receive more affordable and diverse cheap agricultural products. I hope you get the gist of it.