Because there is no incentive to increase productivity, every single collective effort has led to a decline in the yield in the longer term and even famines.
So your concern is about the farmers in such a system not putting in their expected contribution because they will be careless about land not owned by themselves but commonly owned by the larger public and further in some Socialist societies the farmland being worked in a collectivized way - say five farmers working the same land.
I will speak of a solution but let us look at another problem ( other than the one in the OP ) that comes through privately-owned land. In India there are about 60 million court cases pending at various levels of the court system. Many of these pending cases are land disputes and have dragged on for years and many of them involve violence of various kinds between the disputees. Is all this years-long troubles and violence necessary ? If land, whether a farmland or whether under a house or factory, had been removed of private ownership these millions of court cases and their troubles would not have existed in the first place.
Now to the question of missing incentive. Please read
this thread of mine which is a proposal for a new socio-economic system where basic human needs are made free ( like in various Socialist / Communist country experiments ) but there is an evolved money system which requires a person to keep contributing to society as designated or as per the person's capability but eliminates economic classification ( rich, middle, poor ) and prevents hoarding of money.
Further, please read
this post of mine about how the banking system will work in such a socio-economic system and
this post on how agriculture should work in light of recent developments in this field.
Hatred for idol worshipper mushreek kuffar hindu baniya
I agree it should not have happened and the offender should be punished. But a similar thing happened in India where a young Muslim boy went to a Hindu temple to drink water and the follower of a Hindutvadi leader beat up that boy (
vid link ) and then a few days later the beater produced a vid where he said that the Muslim boy had come to the temple with a devious plan and urinated on the idols there. Wah ! And soon posters came up in the temples in that town ( Dasna ) that said that Muslims will no longer be allowed inside the temples. Your thoughts ?
