Joc O'Rourke
President and Chief Executive Officer at Mosaic
Good morning. Thank you for joining our second quarter earnings discussion. I hope you've had a chance to review our post commentary and slides, as well as our earnings release and performance data, all made available on our website. Today, I will provide some additional context before we respond to questions we received last quarter and then we'll conclude with a live Q&A session.
Mosaic delivered excellent financial performance in the second quarter and the second half of 2021 is set up to be one of the strongest periods in over a decade. Our earnings are driven by two key factors. First, strong underlying agricultural markets coupled with [Technical Issues] demand dynamics are driving fertilizer prices higher. Second, and just as important, are the results of our effort to optimize our business to fully realize the benefit of these market trends.
Throughout our long-term and ongoing work to reduce costs, we've created significant earning leverage that this quarter's performance demonstrates. Looking ahead, we expect further upside. Our third quarter, order book is now 90% committed and priced. As a result, we expect a sequential increase of $90 to $100 per tonne in realized phosphate prices and $25 to $35 per tonne in realized potash prices. Beyond the third quarter, we are seeing buyer appetite for fourth quarter commitments as well. All of this implies higher earnings in the third quarter and very strong results in the fourth and into 2022.
The dynamics fueling the agricultural markets point to a period of strength that we believe will extend well beyond 2021. Grain stocks remain limited and global corn and soybean demand is growing, driven in part by surging Chinese demand and biofuels. As a result, agricultural commodity prices remain high and the outlook is promising for continued strong [Technical Issues]. The world's farmers have solid incentive to maximize yields from every acre and that is what drives higher fertilizer demand.
Demand in the Americas is considerably stronger than we expected at the beginning of the year. Brazil is expected to once again set records for fertilizer shipments. Across the Americas, we saw a big recovery in 2020 and expected the demand growth to moderate this year, the opposite has happened. Demand for potash and phosphates is up substantially compared with last year and nearly all of the fertilizer delivered this year has gone to the ground, which means channel inventories in most regions remain below historic norms.
In North America, demand continues to be strong. Following the completion of our CVD petition, U.S. phosphate prices now trade at parity with global benchmarks and the domestic market is benefiting from elevated imports from a more diverse pool of suppliers. This is reflective of a healthy market that's responding to the market signals. In India, farmer demand remains very strong, but the importer economics have negatively impacted available supply in the country because of the disconnect in government subsidies. As a result, it is difficult for the Indian farmer to get the phosphates they desire. It is clear that more work needs to be done to rectify the imbalance.
But we continue to see the region's absorbing fertilizer supply. Given how depleted Indian inventories are, we see India as a source of pent-up demand for the future. Southeast Asian fertilizer demand is benefiting from the strength in palm oil and China is incenting its farmers to maximize yield. While the demand dynamics for potash and phosphates are similar, driven by the strong underlying agricultural markets, the supply outlook is slightly different for the two products. In phosphates, new supply is limited and any new Greenfield supply addition for several years from completion.
Recently Russia requested producers prioritize domestic demand to stabilize in-country pricing and while supply from Chinese phosphate exports during the second quarter was elevated to meet global demand, Chinese exports are expected to decline in the second half of the year as in-country seasonal demand increases. This was reinforced by news last week, the Chinese National Development and Reform Commission has begun requesting the export of fertilizers to ensure adequate domestic supply.
In potash, demand growth continues to exceed new supply from higher operating rates recently announced by producers. As a result, prices continue to rise. In fact, price increases have largely offset the financial impact of our early closure of K1 and K2 shafts with Esterhazy. We recently resumed production at Colonsay and now expect our net production loss to be approximately 700,000 tonnes per year, down from our original 1 million tonne estimate. This also brings the sales impact down to approximately 500,000 tonnes as we drawdown available inventory.
Our earnings are leading to significant free cash flow generation, which has allowed us to proceed with the early retirement of our $450 million in long-term debt later this month. We are currently evaluating additional options for capital deployment. Capital expenditures are expected to total $1.2 billion in '21. This includes accelerated K3 spending to speed up our ability to bring K3 to full production, as well as approximately $75 million in additional high returning opportunities within our businesses.
Given the strong cash generation, we continue to evaluate opportunities, but also allow us to further strengthen our balance sheet for all the business and share with our investors. Overall, Mosaic continues to execute and perform very well in this robust fertilizer market and we expect to continue building momentum from here.
With that, we will move on to your questions.