In my world , the Pan-Human Empire finally boasts a total area of 10,000,000,000 miles , and a population of 800 billion. They are "only" 200 billion people left to be born until the empire finally reaches its goal of 1 trillion people. Due to this , the government begins to survey land for Allocation to its state run Agricultural sector.
Possibly useful information
do to the infinite plane world ( upon which my story occurs ) having a similar sea to land ratio as earth , only 2.5 billion of its total area is actually land
1/3 , or 834 million miles of this land is desert , leaving 1.666 billion miles of non-dessert
1/10 , or 166.6 million miles of This are national parks , leaving 1.5 miles of non-park land
1/20 or 75 million miles of this is urbanized city/town/village land , leaving 1.425 billion miles of farmable land
1/10 or 142.5 million miles of this is either reservation land or privately owned land , leaving 1.2825 billion miles of land that can be used by the government to farm
My Questions are:
A) How much would it take to feed 1 trillion people who eat , stay , 1200 pounds each per year? ( assume that only plants are being grown )
B) Is the available amount of land enough to feed the trillion people?
C) if the amount is not enough , how much more land would the government have to annex to obtain enough land?