Table 3.

Optimal sampling size for FSL and FNP over different densities (100, 150, 200, 300, 400 and 600 seeds m⁻²) and precisions (5, 10 and 15%)

Sowing density (seeds m−2)	Parameters		CV = 5%		CV = 10%		CV = 15%
	a	b	FSL (cm)	FNP (Nb. Plt)	FSL (cm)	FNP (Nb. Plt)	FSL (cm)	FNP (Nb. Plt)
100	1.11	5.70	2478	363	620	90	250	39
150	1.15	3.01	1406	348	351	88	130	37
200	1.32	3.00	1398	308	350	78	130	33
300	1.10	2.41	1162	363	291	90	110	39
400	1.10	1.44	774	363	194	90	60	39
600	1.16	0.96	584	348	146	85	50	37

This was calculated using the average values of the parameters a and b of the gamma distribution derived for each density over the 14 plots available