Within row intercropping of corn in sweetpotato
1994
Villamayor, F.G. Jr. (Visayas State Coll. of Agriculture, Baybay, Leyte (Philippines). Philippine Root Crops Research and Training Center)
Sweetpotato (cv PSBSp 15) was intercropped with glutinous corn (cv Lagkitan) at planting. The treatments used were as follows: A-pure corn, B-pure sweetpotato, and C-corn + sweetpotato. The spacing for A was 100 cm x 37.5 cm with 2 seedlings/hill; for B, 100 cm x 25 cm with one cutting/hill; and C, 100 cm x 50 cm with 2 cuttings or seedlings per hill planted in the same row. Complete fertilizer (14-14-14) was applied on a per hill basis 10 days after planting (DAP) for both crops at 9 g/plant. This is equivalent to about 67, 50, and 101 kg/ha N-P3O6-K3O for treatments A, B, and C, respectively. Corn was harvested 60 DAP and sweetpotato 120 DAP. The intercropped corn had yield of 71.8 percent of the pure corn (2.55 t/ha vs 3.55) but this difference was not significant. The intercropped sweetpotato had yield of 72.7 percent of the pure sweetpotato (11.4 t/ha vs. 15.6) and this difference was highly significant. The land equivalent ratio (LER) of the intercropping treatment was 1.44
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