Step 1: Understanding the Concept:
Traditional indigenous farming systems are unique, location-specific agricultural practices evolved by local communities to conserve water, soil, and nutrients while ensuring food security.
Step 2: Detailed Explanation:
The "Zabo" (also known as the Ruza system) is a highly efficient indigenous farming system practiced in the state of Nagaland, particularly by the Chakhesang tribe of Phek district.
The term "Zabo" translates to "ruo-zubo", which means impounding water.
It is an integrated system combining forestry, water harvesting, animal husbandry, and agriculture (specifically paddy cultivation and fish culture).
Water is collected from the hilltop forests in constructed ponds on the middle slopes and then utilized for irrigation in terrace fields located on the lower slopes.
Step 3: Final Answer:
Thus, the Zabo system is mainly practiced in Nagaland, which is option (B).