You can continue to hold the agricultural lands bought when you were an Indian citizen 

you cannot purchase any agricultural land nor gift any agricultural land but you can bequeath agricultural land to your family members by will 

An Indian who owns agricultural lands prior to obtaining Canadian citizenship will still have rights over the agricultural lands which he owns subsequent to his obtaining Canadian citizenship. An NRI can't buy agricultural lands. 

The agricultural land that you already own will remain on your name forever till you transfer it to anyone irrespective of the fact that your citizenship has changed recently. 

You may not be able to purchase anymore after acquiring Canadian citizenship. 

- As per law, the agriculture land which you have already purchased prior to getting Canadian citizenship will not affected , and it will continue in your name.

- However, after attaining the citizenship of Canada , you cannot purchase new agriculture land without approval of RBI. 

Yes, even if you renounce your Indian citizenship to become a Canadian citizen, you will still have rights to your land in India.

• 
  Land Ownership: Renouncing Indian citizenship doesn't automatically strip you of your property rights. You can continue to own and possess land in India.
• 
  Restrictions: However, there might be restrictions on the type of land you can acquire or hold as a foreign national. Agricultural land, plantation property, and farmhouses usually have specific regulations.
• 
  OCI Card: Consider applying for an Overseas Citizen of India (OCI) card. This will grant you most of the rights of an Indian citizen, except for voting and holding public office, and can make property transactions smoother.
• 
  Taxation: You might be liable for taxes in both India and Canada on income derived from your Indian property. Consult a tax professional for guidance.
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  Inheritance: Inheritance laws for foreign nationals can be different, so it's advisable to consult a legal professional to understand the implications.

Agriculture land will vest in govt than.

If you owned agricultural property before the change of your residence and nationality status, your title and ownership would not be affected.

Dear Client,

According to Indian laws, NRIs cannot purchase agricultural land in India, but since you already own the land, you retain your ownership rights. You can continue to own the agricultural and residential lands you currently have in Guntur (Amaravathi), Andhra Pradesh. However, any new acquisition of agricultural land would not be permitted.

You don't have any problem with the properties you owned the status of Indian citizen doesn't affect when you change citizenship.

You will have rights in your earlier land but you will not be able to purchase agricultural land after change of citizenship