Speaking in Glasgow Chancellor George Osborne said, "the conclusion is clear, the pound we share works well. The saying goes - if it ain't broke don't fix it, but I say, if it ain't broke don't break it."
He added, "I want the best for Scotland and for all our United Kingdom. We're better together."
Only way to keep pound in Scotland is to 'stay in the UK'
Speaking in Glasgow the Chancellor has said:
The SNP asserts that it would be in everyone's interests for an independent Scotland to keep the pound as part of a eurozone-style sterling zone.
But the Treasury analysis we are publishing today shows that is not the case. Let's stop speculating and look at the evidence.
Would the rest of the UK family agree to take that risk? Could a situation where an independent Scotland and the rest of the UK share the pound and the bank of England be made to work? Frankly it's unlikely because there is real doubt to the answers of these questions.
In other words the only way to be sure of keeping the pound as Scotland's currency is to stay in the United Kingdom.
How the Chancellor's Budget plans to help business
New Employment Allowance will take the first £2,000 off the employer National Insurance bill of every company in the country
Around 450,000 small businesses - one third of all employers - will pay no employer National Insurance at all after introduction of Employment Allowance in April next year
Small firms will be given help through Government procurement budgets, growth vouchers and controls on regulators' charges
The Capital Gains Tax holiday will be extended
Corporation tax to be reduced by a further 1% to 20% in April 2015
Small company and main rates of corporation tax merged at 20p
Here are some of the measures announced by Chancellor George Osborne that could affect voters' wallets:
Rise in personal allowance brought forward to 2014, meaning no income tax on the first £10,000 of earnings
Tax free child care vouchers worth £1,200 per child and increased support for families with children on universal credit
Flat rate pension worth £144 a week to be brought forward to 2016
Fuel duty rise scrapped
Help for Equitable Life policy holders extended to those who bought with-profits annuities before 1992, with payments of £5,000 and extra £5,000 for those on lowest incomes
Planned 3p rise in beer duty tax scrapped and replaced by a 1p cut in duty on a pint of beer
New Help-to-Buy scheme for those struggling to find mortgage deposits will include £3.5 billion for shared equity loans, and a Government interest-free loan worth 20% of the value of a new build house
Cap-on social care costs to come in in 2017 and protect savings above £72,000
Small businesses to pay no employer National Insurance
Around 450,000 small businesses across the country - one third of all employers - will pay no employer National Insurance at all after the introduction of Employment Allowance in April next year.