I doubt that land has that much effect on pricing differences. Farms in china have similar implied value/acre as ones in the US (http://www.usda.gov/nass/PUBS/TODAYRPT/land0815.pdf + http://www.chinabusinessreview.com/rural-chinas-nascent-land...)

The main drivers of developing countries costing more is going to come down to better infrastructure (which costs more money) and stricter regulation. Sure, being able to drink water from your tap, have a low risk of being injured at work, having high food safety and a strong social net leads to higher costs, but to most of us, it's completely worth it.