The Rainfed agriculture area (like in your discussed area (Africa)) is not comparable to the irrigated agriculture area in Asia particularly in a rice field.
An irrigated rice field must be classified into Small-Medium or Large scale because it will need a different complicity of water management and its agricultural practices. While classification of Large or small scale for a rainfed area with other rice crops,will much depend on agriculture management, particularly on the requirement or availability of machine or man ppower
The Rainfed agriculture area (like in your discussed area (Africa)) is not comparable to the irrigated agriculture area in Asia particularly in a rice field.
An irrigated rice field must be classified into Small-Medium or Large scale because it will need a different complicity of water management and its agricultural practices. While classification of Large or small scale for a rainfed area with other rice crops,will much depend on agriculture management, particularly on the requirement or availability of machine or man ppower