Parliament has announced the ministries whose Demands for Grants will be discussed in detail in the Lok Sabha (after April 12 when Parliament reconvenes).  They are:

Defence

Rural Development

Tribal Affairs

Water Resources

External Affairs

Road Transport and Highways

Together these ministries have asked Parliament for a total of  Rs 289,938 crore (Rs 175,772 crore for Defence alone) – which is slightly over a quarter of the total expenditure budgeted by the Central Government for 2010-11.

The Rajya Sabha does not discuss demands for grants but has announced a list of ministries whose functioning it will review after the recess.  They are:

Home Affairs

Tribal Affairs

Defence

Power

Chemicals and Fertilizers

Petroleum and Natural Gas

Youth affairs and Sports

Women and Child Development

Consumer affairs, Food and Public Distribution

Housing and Urban Poverty Alleviation

During the recess, the Departmentally Related Standing Committees of Parliament examine the Demand for Grants submitted by various Ministries.  The Demand for Grants are detailed explanations of that Ministry's annual budget which form part of the total budget of the government.  These are examined in detail, and the committees can approve of the demands, or suggest changes.  The Demand for Grants are finally discussed and voted on by the Parliament after the recess.  (The post below lists the ministries whose Demand for Grants will be discussed in detail after the recess). The issue is - how effective is the institution of Parliament in examining the budget?  Though India specific information on this subject is hard to find, K. Barraclough and B. Dorotinsky have cited the World Bank - OECD Budget procedures Database to formulate a table on the legislature approving the budget presented by the executive ("The Role of the Legislature in the Budget Process: A Comparative Review", Legislative Oversight and Budgeting).  I reproduce the table below:

In Practice, does the legislature generally approve the budget as presented by the Executive? (in percent)
Answer All Countries OECD Countries Presidential democracies Parliamentary democracies
It generally approves the budget with no changes 34 33 14 41
Minor changes are made (affecting less than 3% of total spending) 63 67 71 59
Major changes are made (affecting more than 3% but less than 20% of total spending) 2 0 7 0
The budget approved is significantly different (affecting more than 20% of total spending) 0 0 0 0
Sources:  K. Barraclough and B. Dorotinsky; PRS.