Ryotwari

The Ryotwari system was a land revenue system in British India, introduced by Thomas Munro in 1820 based on system administered by Captain Alexander Read in the Baramahal District. It allowed the government to deal directly with the cultivator ('ryot') for revenue collection and gave the peasant freedom to cede or acquire new land for cultivation. The peasant was assessed for only the lands that he cultivated.
Description.
This system was in operation for nearly 5 years and had many features of revenue system of the Mughals. It was instituted in some parts of British India, one of the three main systems used to collect revenues from the cultivators of agricultural land. These taxes included undifferentiated land revenue and rents, collected simultaneously. Where the land revenue was imposed directly on the ryots (the individual cultivators who actually worked the land) the system of assessment was known as ryotwari. Where the land revenue was imposed indirectly—through agreements made with Zamindars -- the system of assessment was known as zamindari. In Bombay, Madras, Assam and Burma the Zamindar usually did not have a position as a middleman between the government and the farmer.
An official report by John Stuart Mill, who was working for the British East India Company in 1857, explained the Ryotwari land tenure system as follows: 
History.
The Ryotwari system is associated with the name of Thomas Munro, who was appointed Governor of Madras in May 1820. Subsequently, the Ryotwari system was extended to the Bombay area. Munro gradually reduced the rate of taxation from one half to one third of the gross produce, even then an excessive tax. The levy was not based on actual revenues from the produce of the land, but instead on an estimate of the potential of the soil; in some cases more than 50% of the gross revenue was demanded.
In Northern India, Edward Colebrooke and successive Governor-Generals had implored the Court of Directors of the British East India Company, in vain, to redeem the pledge given by the British Government, and to permanently settle the land-tax, so as to make it possible for the people to accumulate wealth and improve their own condition.
Payment of the land tax in cash, rather than in kind, was instituted in the late 18th century when the British East India Company wanted to establish an exclusive monopoly in the market as buyers of Indian goods. Critics asserted that in practice the requirement of cash payments was ruinous to the cultivator, exposing him to the demands of moneylenders as an alternative to the loss of his land and starvation when crops failed.
Other systems.
In Bengal and Northern India the zamindari system was as follows:
By comparison, this is the way taxes had been collected by the king:
The differences are these:
Also because of the political scheme of Subsidiary Alliances, the pressure on agricultural land made things worse. It led to a failure of administration, leaving the blame on the feudatory king of the province; and therefore the British easily could take over the administration.