Table 3.

Fuzzy rule-base to infer the harrowing (O_HI) (none, lightest, light, strong, strongest) for site–specific harrowing, after three levels (low, medium, high) of the variables crop leaf cover (I_LC) and soil density (ISD), and four levels (none, low, medium, high) of the variable weed density (I_WD).

Input variables							Output variable
IF	ILC	AND	ISD	AND	IWD	THEN	OHI
	low		low		none		none
	medium		low		none
	high		low		none
	low		medium		none
	medium		medium		none		lightest
	high		medium		none
	low		high		none
	medium		high		none
	high		high		none
	low		low		low
	medium		low		low
	high		low		low
	low		medium		low
	medium		medium		low
	low		medium		medium
	high		medium		low		light
	low		high		low
	medium		high		low
	high		high		low
	low		low		medium
	medium		low		medium
	high		low		medium
	medium		medium		medium
	low		high		medium
	medium		high		medium
	low		low		high
	medium		low		high
	low		medium		high
	low		high		high
	high		medium		medium		strong
	high		high		medium
	high		low		high
	medium		medium		high
	medium		high		high
	high		medium		high		strongest
	high		high		high