He has been with Lindsay for 12 years and most recently was the President of our Irrigation business.
At that time, we announced that through the efforts of the foundation for growth initiatives, we would achieve 11% to 12% operating margins in fiscal year '20.
I'm very proud of the Lindsay team to say that we achieved our fiscal year '20 goal reaching 11.4% operating margin, especially given the challenging environment in which we were operating in.
Our goal was to achieve first quartile status in the comparison against approximately 2,000 companies that are used in their benchmarking exercise.
In addition, the Infrastructure business in fiscal year '20 achieved the highest revenue, operating income and operating margin, since Lindsay acquired this business in 2006.
And Brazil achieved its highest revenue in local currency in fiscal year '20, since this business was established in 2002.
This year storm volume was down slightly from prior year, but more than 10% below the five-year average for the quarter.
Government support in the US was visible for the 2019 harvested crop with the $16 billion Coronavirus Food Assistance Program or CFAP announced earlier this year.
That was addressed with the announcement of the second round of CFAP payments in mid-September, when a further $14 billion in government aid was announced.
New subscription volume for the 2020 season, inclusive of the Net Irrigate acquisition was up 174% versus prior year.
We've also seen renewal rates approaching 97%, so we're successfully retaining customers in addition to attracting new ones.
We continue to see adoption of the MASH compliant product line where sales were up more than 120% versus prior year.
In addition to the extension the Highway Trust Fund was infused with $13.6 billion to continue funding for important road infrastructure projects.
Total revenues for the fourth quarter of fiscal 2020 increased 26% to $128.4 million, compared to $101.9 million in the same quarter last year.
Net earnings for the quarter were $14.7 million, or $1.35 per diluted share compared to net earnings of $5.8 million or $0.54 per diluted share in the prior year.
Total revenues for the full year of fiscal 2020 increased 7% to $474.7 million, compared to $444.1 million in the prior fiscal year.
Net earnings for fiscal 2020 were $38.6 million, or $3.50-$3.56 per diluted share compared to net earnings of $15.6 million, or $1.45 per diluted share in the prior fiscal year.
Irrigation segment revenues for the fourth quarter increased 9% to $75.6 million, compared to $69.5 million in the same quarter last year.
North America irrigation revenues were $39.8 million, compared to $41.5 million in the same quarter last year.
In the international irrigation markets, revenues of $35.8 million increased $7.8 million, or 28% compared to last year's fourth quarter.
Higher sales volumes in Brazil, Australia and the Middle East were partially offset by the effect of differences in foreign currency translation rates compared to the prior year of approximately $3.4 million.
Total irrigation segment operating income for the fourth quarter was $5.8 million, compared to $6.3 million in the same quarter last year.
And operating margin was 7.7% of sales, compared to 9% of sales in the prior year.
Operating margin in the current quarter was negatively impacted by expenses of approximately $1.6 million related to an increase in the environmental remediation liability, as well as severance costs.
Environmental remediation liability was increased by $1 million in connection with a revised plan to remediate environmental contamination at our Lindsay Nebraska site that was submitted to the EPA in August.
Excluding the effect of the increase in the environmental remediation liability and severance costs, operating income for the quarter was $7.4 million and operating margin was 9.8% of sales.
For the full fiscal year, total irrigation segment revenues were $343.5 million, compared to $351.5 million in the prior fiscal year.
North America irrigation revenues of $219 million were essentially flat compared to the prior year.
International irrigation revenues for the year were $124.6 million, compared to $132.9 million in the prior fiscal year.
After considering the unfavorable effect of differences in foreign currency translation rates of approximately $8.6 million, international irrigation revenues were also assessed-essentially flat compared to the prior fiscal year.
Irrigation operating income for the full fiscal year was $40.2 million, or 11.7% of sales, compared to $33.3 million, or 9.5% of sales in the prior fiscal year.
Infrastructure segment revenues for the fourth quarter increased 63% to $52.8 million, compared to $32.4 million in the same quarter last year.
Infrastructure segment operating income for the fourth quarter was $20.1 million, an increase of 115% compared to $9.3 million in the same quarter last year.
Infrastructure operating margin for the quarter was 38% of sales, compared to 28.8% of sales in the prior year.
For the full fiscal year, infrastructure segment revenues increased 42% to $131.2 million, compared to $92.6 million in the prior fiscal year.
Infrastructure operating income for the full fiscal year was $43.8 million, compared to $16.8 million in the prior fiscal year.
Operating margin for the year was 33.4% of sales, compared to 18.1% of sales in the prior fiscal year.
We are also well positioned to invest in growth opportunities that we identify.
Our total available liquidity at the end of the fiscal year was $190.9 million, with $140.9 million in cash, cash equivalents and marketable securities, and $50 million available under our revolving credit facility.
Our total debt was $115.9 million at the end of the fiscal year, of which $115 million matures in 2030.
At the end of the fiscal year, we were well within the financial covenants of our borrowing facilities, including a funded debt to EBITDA leverage ratio of 1.5 compared to a covenant limit of 3.0.

Summary:
Total revenues for the fourth quarter of fiscal 2020 increased 26% to $128.4 million, compared to $101.9 million in the same quarter last year.
Net earnings for the quarter were $14.7 million, or $1.35 per diluted share compared to net earnings of $5.8 million or $0.54 per diluted share in the prior year.
We are also well positioned to invest in growth opportunities that we identify.