A Review of Sensor Technologies Applicable for Domestic Livestock Production and Health Management

Table 2

Comparison of the UAV-based method for estimation of estimation of herbage mass for tall fescue and dry ryegrass-based pastures rotational grazed by lactating cows.

	Biomass estimation (Kg DM/ha)			Comparison vs. UAV
	Mean	SD	N	Bias	t-test	RMSE	RE	R^2	r
UAV	2017	530	52	—	—	—	—	—	—
C-Dax	1971	350	52	−46	0.37	363	18	0.53	0.73
Ruler	2073	636	52	56	0.30	386	19	0.63	0.80
Mean	2022	472	52	5	0.90	313	15	0.65	0.81

Adapted from [44].