Productivity of Onions Using Subsurface Drip Irrigation versus Furrow Irrigation Systems with an Internet Based Irrigation Scheduling Program

Table 2

Effect of irrigation method on average yield parameters (Mg ha⁻¹) as classified by size classes, onion quality, and gross return at the Los Ebanos and at the Weslaco research station field sites (2012–2014).

Spacing (cm)	Size class (Mg ha^−1)					Pyruvic acid (µmol mL^−1)	Soluble solid concentration (%)	Gross return $ ha^−1
	Small	Medium	Large	Colossal	Total
Los Ebanos (2012-2013)
SDI	0.6	14.0	44.1	4.3	62.9	4.3	8.3	25,042
Furrow	0.6	12.1	14.4	1.6	28.7	4.4	8.8	11,372
	NS	NS	*	*	*	NS	*	*
Weslaco research station (2013-2014)
SDI	3.7	24.4	10.7	0.6	39.3	4.4	6.0	15,994
Furrow	4.1	12.3	3.8	0	20.2	4.3	6.2	7,855
	NS	*	*	*	*	NS	NS	*

Significant at the 0.05 level.