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Response of watermelon [ Citrullus lanatus (Thunb.) Matsum. & Nakai cv. Charleston Gray] to factorial combinations of trickle irrigation or no irrigation and black polyethylene mulch or no mulch was evaluated during 2 successive years on a southwestern Indiana Lyles fine sandy loam. Both trickle irrigation and polyethylene mulch, alone and in various combinations, increased stem growth and early and total yields of watermelon compared to untreated watermelons. Greatest stem growth and early and total yields were obtained from plants grown on polyethylene mulch in combination with trickle irrigation. Mean fruit weight did not vary with treatment. Trickle-irrigated watermelon plants produced shallow rooting near trickle emitters; nonirrigated plants produced relatively extended, deep, and diffuse roots. Petiole Zn concentration was greater in plants grown on polyethylene mulch than no mulch. Trickle irrigation resulted in a decreased concentration of petiole Mn.
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H. S. Bhella (1988) studied this question.
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