Which system was developed in cooperation among federal and provincial agricultural organizations for land capability assessment?

The Canada Land Inventory (CLI) is the correct answer because it was specifically developed through collaboration among various federal and provincial agricultural organizations to assess land capability. The primary purpose of the CLI was to classify Canadian land according to its potential for various types of agricultural use and to evaluate its resources effectively. This systematic approach provided a comprehensive inventory of Canada's land resources, allowing for informed decision-making in land management, resource conservation, and agricultural development.

The other systems mentioned do not have the same historical context or intent as the CLI. While Soil Survey Reports offer valuable information about soil characteristics, they don't encompass a broader land capability assessment. Environmental Land Assessment (ELA) generally focuses on evaluating environmental impacts rather than land use potential specifically. The National Soil Testing Program (NSTP) deals with soil health and nutrient management but isn't aimed at broad land capability assessment in the cooperative manner that the CLI represents. Thus, the CLI stands out as a comprehensive effort designed for land capability classification at a national level.