Spending: $148.6 billion
Percentage change from 2010: 9.7 percent increase
Mandatory Spending: $122.8 billion
Highlights: Obama's proposed budget includes hundreds of millions of dollars in increased spending to help feed the poor while also limiting government handouts to wealthy farmers.
The budget would provide $8.1 billion for nutrition programs, a $400 million increase from the president's 2010 budget. It would allocate $10 billion over 10 years to improve access to USDA food programs, establishing higher nutrition standards at schools and aiming to reduce childhood hunger.
The budget also would increase government spending on food stamps, a jump of $11 million to a proposed $36 million. That includes an extension for an additional year of benefits under the American Recovery and Reinvestment Act, which temporarily eliminated food stamp time limits for certain low-income adults.
Obama wants to limit the amount of money that wealthy farmers can receive from the government. Direct payments to farmers would be reduced from $40,000 per person per year to $30,000. Direct payments are payments to farmers based on historical production.
The budget also proposes limiting direct payments to farmers who make $500,000 or less in farm income; the limit is currently $750,000 or less.
Also in Obama's agriculture proposal:
$429 million for research grants through the Agriculture and Food Research Initiative.
$418 million in loans and grants for expanding rural broadband access.
$1.2 billion for the Environmental Quality Incentives Program to help farmers comply with regulatory requirements and protect natural resources, a 67 percent increase in funding over 2010.
Spending: $9.1 billion
Percentage change from 2010: 34.4 percent decrease
Mandatory Spending: $180 million
Highlights: The department's discretionary budget would decline from $13.8 billion in 2010 to $8.9 billion in the fiscal year beginning Oct. 1. Much of the proposed decrease comes from the U.S. Census Bureau, which received a huge spending increase last year to hire about a half million people and conduct the 2010 census.
The proposed Commerce budget would provide $1.3 billion to process, tabulate and release 2010 census data. Funds for the census are closely watched by Congress because the count determines government pay-outs to states and cities and the number of congressional seats in each state. Democrats typically seek more funds to enable accurate counts for poor and minority communities who have been undercounted in the past.
The National Oceanic and Atmospheric Administration, which oversees the government's weather forecasting and conducts climate and ocean research, would get more money in the plan. The proposal would provide NOAA with more than $2 billion - the equivalent of the worldwide box office take of the blockbuster film "Avatar" - for weather satellites, measurements of sea level and other climate data.
The proposed budget would eliminate a grant program created in 2004 for manufacturers of worsted wool fabric. The department said wool manufacturers had enough time to adjust to changes in the trade law. It would also ax funding for a program that supports public television stations' conversion to digital broadcasting. The department said the required conversion efforts have been completed and money for remaining digital conversion would be available from the Corporation for Public Broadcasting.
Spending: $768.2 billion
Percentage change from 2010: 2.2 percent increase
Mandatory Spending: $59.9 billion
Highlights: Obama's budget would boost defense spending slightly, with more money for helicopters, unmanned planes, commandos and other highly specialized assets that officials say are needed to fight nimble enemy forces in Afghanistan and elsewhere.
The budget also would support for the first time Obama's envisioned European missile shield aimed at deterring Iran. Last fall, Obama scrapped a Bush-era project in Eastern Europe in favor of smaller radar systems with a network of sensors and missiles deployed at sea or on land.
Unlike last year's budget, when Obama called for an end to F-22 production, Obama's 2011 plan spares the military's major defense systems. The budget supports the F-35 Joint Strike Fighter, a new family of ground vehicles, as well as new ships.
One exception is the C-17 cargo plane, which the administration says the military should stop buying. The proposed cut would save $2.5 billion. The Pentagon has tried to cease production of the aircraft before, but lawmakers have restored the money because they fear ending the program would cost jobs in their home states.
Included in the $768 billion request is $159 billion for operations overseas.
In addition to the 2011 defense budget, Obama is asking for another $33 billion in war spending to sustain operations in Iraq and Afghanistan through September. The administration says the extra money was needed because of the 30,000 more troops being sent to Afghanistan.
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Spending: $82.3 billion
Percentage change from 2010: 32.8 percent increase
Mandatory Spending: $32.6 billion
Highlights: Obama is asking Congress for a major increase in education spending as he seeks to overhaul the nation's system and revise the Bush-era No Child Left Behind law.
The administration wants to help an additional 1 million college students by increasing the Pell Grant tuition program by $17 billion, to just under $35 billion. Pell Grants are the main form of college aid to the poor. The maximum grant would increase by $160 to $5,710.
Obama is seeking an increase in the Elementary and Secondary Education Act, a $3 billion jump to $28 billion. There could be $1 billion more if Congress agrees to some major changes in the law.
The administration wants $1.35 billion more to expand the president's Race to the Top challenge, a federal grant program in which 40 states are competing for $4 billion in education money included in last year's stimulus bill.
In revising the No Child Left Behind law, Obama wants changes in how schools are judged to be successes or failures. The administration contends that if federal education spending is more competitive, states and school districts would do a better job. That's a change from the government's traditional formula-driven approach in which states and districts can look forward to getting a certain amount of money each school year, regardless of how good a job they do educating students.
Obama favors using student test scores to judge teacher performance and determine support for charter schools, which get public money but operate independently of local school boards. National teachers' unions disagree with that approach, saying student achievement is more than standardized test scores and that relying heavily on charter schools is a mistake.
Congress passed the No Child Left Behind law with bipartisan support in 2001 but deadlocked over a rewrite in 2007.
Spending: $26.8 billion
Percentage change from 2010: 9.2 percent increase
Mandatory Spending: None.
Highlights: The budget follows through on Obama's call in his State of the Union address to build "a new generation of safe, clean nuclear power plants in this country," by tripling the amount for loan guarantees for nuclear power to $54.5 billion. The spending proposal also aims to give a boost to energy efficiency and renewable energy projects with an additional $500 million in credit subsidy in support of $3 billion to $5 billion in loan guarantees.
As a candidate, Obama promised to close the Yucca Mountain nuclear waste facility in Nevada, and the budget calls for eliminating funding for the site.
The budget also calls for a 4.6 percent increase in basic research.
Funding would be increased for energy efficiency and renewable energy programs such as solar energy.
Agency: Environmental Protection Agency
Spending: $9.9 billion
Percentage change from 2010: 3.2 percent decrease
Mandatory Spending: None.
Highlights: Obama's budget would finance efforts by the Environmental Protection Agency to regulate the gases blamed for global warming - a first - as the administration awaits congressional action on legislation.
The budget seeks $43 million in new funds for the EPA and states to control emissions of heat-trapping pollution from automobiles and refineries, power plants and factories. The administration also is looking for more money to roll out a new rule that would require polluters to annually report the amount of greenhouse gases they release.
Unlike last year, the budget does not bank on raising money for a promised tax cut and clean energy technologies by auctioning off permits to companies that emit global warming gases. Congress has balked at that strategy. A House-passed bill gives the bulk of the permits away for free, as would a proposal being worked on in the Senate. Instead, there is a placeholder for a to-be-determined climate policy that would reduce emissions by more than 80 percent by 2050. The budget says the policy will be deficit neutral because the money made from selling permits will be returned to families, communities and businesses to help offset higher energy costs.
With a slight decrease in its request for hazardous-waste sites, the administration will likely continue to lag behind previous administrations in the pace of its cleanups.
The budget would continue to supply billions of dollars worth of grants to states and local governments to improve sewage treatment plants and drinking water systems, although the total is slightly less than last year. It adds another $1.3 billion - a 14 percent increase - to help cash-strapped states and tribes implement air and water programs.
Agency: Health and Human Services
Spending: $915.5 billion
Percentage change from 2010: 3.9 percent increase
Mandatory Spending: $832 billion
Highlights: Obama's health care budget takes modest steps to stretch the safety net for low-income families trapped in the economic downturn and improve the quality of medical care for seniors.
But his biggest project - health care overhaul to expand coverage and grapple with costs - is on hold in Congress with Democrats uncertain how to push the sweeping legislation over the finish line.
The budget includes a $25.5 billion cash infusion to help states cover the costs of their Medicaid programs until July of next year. Medicaid rolls grew as state revenues plummeted during the recession. Under the budget, every state would get an additional 6.2 percent of its Medicaid costs paid by Washington. That would extend federal assistance provided under the stimulus bill.
Obama is also calling for a big increase - $290 million - for community health centers that are front-line providers of medical care for low-income Americans, including many uninsured.
The budget takes a small - but potentially significant - step to improve Medicare quality by launching a series of experiments on how to better coordinate care for seniors with multiple chronic illness. And it adds funds for research into what kinds of medical treatments work best.
Also in Obama's health budget:
A crackdown on fraud, waste and abuse in Medicare and Medicaid, which the administration estimates could save more than $1 billion a year over the next decade.
A $1.4 billion investment to improve food safety, following outbreaks of illness in recent years.
A $1 billion increase for the National Institutes of Health for medical research, including the development of new drugs for cancer and other life-threatening illnesses.
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Agency: Homeland Security
Spending: $44 billion
Percentage change from 2010: 1 percent increase
Mandatory Spending: $193 million
Highlights: In the wake of the attempted Christmas Day terrorist attack, Obama is seeking to strengthen aviation security programs.
The budget proposes funds to pay for 1,000 technologically advanced machines at airports. There is also money to hire more Federal Air Marshals so that they will be on more international flights. Currently there are more than 4,000 air marshals, with the exact figure classified.
While Obama is asking for the same amount in overall funds for screening operations - such as those at airports - he is asking for more money for explosive detection devices.
The budget calls for 25 percent less money for the border fence and technology - a controversial George W. Bush administration initiative that has run into problems.
The president's is asking for more money for counterterrorism and preparedness grants.
On the heels of the administration's decision to reconsider holding the high profile Sept. 11 trial in New York City, the president is asking for $200 million in grants available to those cities that do end up holding these trials. New York lawmakers said it would cost them $200 million a year if the trial is held in a Manhattan courthouse.
Despite promises to make cyber security a priority in his administration, Obama is asking for a decrease in funds for the department's cyber security division. He is also asking for less money to fund a program that detects biological threats.
Obama also is calling for cutting 1,100 active duty personnel in the Coast Guard and 181 Border Patrol agents. Recent administrations have hired more agents and Obama said the current number of about 20,000 agents is sufficient. Funds for immigration enforcement remains basically the same as last year.
Agency: Housing and Urban Development
Spending: $48.9 billion
Percentage change from 2010: .9 percent decrease
Mandatory Spending: $7.3 billion
Highlights: The agency got a big boost in funding during the president's first year but would experience a small cut in the fiscal year beginning Oct. 1.
Cuts would occur in a fund used to renovate public housing inventory, from $2.3 billion to $2 billion, and in the block grants used for constructing Native American housing, from $690 million to $578 million. Two programs that finance the development of supportive housing for the elderly and disabled will be suspended, though projects already in the pipeline would continue.
The agency will also begin consolidating 13 rental assistance programs to cut down on duplicative work assignments and improve customer service.
Spending on homelessness assistance would increase by nearly $200 million, or about 10 percent. Also, a recent increase in borrower fees and stricter lending requirements will generate $6 billion in profit for the Federal Housing Administration, a stark contrast to the publicly anticipated shortfall. The agency is a major source of funds for first time home buyers and there have been concerns that it would need a cash infusion.