what exepert mean when they say Invest for sustainable agriculture?

Agriculture and other natural resource-based enterprises are the foundation for economic growth in many developing countries. Of the 11 percent of the world's land surface that is suitable for agriculture, 38 percent has become degraded by poor natural resource management practices. With no significant room to expand areas of cultivation, good farming practices and stewardship of the available land are necessary to increase agricultural productivity, ensure economic growth, protect biodiversity, maintain sufficient amounts of clean water, and meet the increasing food demands of a growing global population. I want to know from the exepert how to invest for SA?