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Journal article

Potato intercropping systems with maize and faba bean

Roder W, Anderhalden E, Gurung P, Dukpa P ...see all

American Potato Journal, vol. 69, issue 3 (1992) pp. 195-202

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Abstract

Potato is a major cash crop for Bhutanese highland farmers, who widely
use intercropping systems combining potato (Solanum tuberosum) with
maize (Zea mays). Scarcity of information on existing cropping practices
limits the scope of present extension programs. Experiments evaluating
potato intercropping systems with maize and faba bean (Vicia faba) were
conducted at Yusipang (2700 m) and Kangma (1900 m). Potato yield
reductions through intercropping ranged from 0-21 percent depending on
year, and location. Variation in planting geometry and maize planting
date did not affect potato yield reductions. The land equivalent ratio
ranged from 1.03-1.06 for faba bean and from 1.11 to 1.49 for maize
intercropping systems. Compared to potato as a sole crop maize
intercropping increased gross benefits in Kangma by 12-15 percent with
maize plant densities of 2.8 per m2. In Yusipang, gross benefits were
not increased through intercropping. Reducing risks of environmental and
market impacts favor the use of intercropping systems.

Author-supplied keywords

  • Bhutan Solanum tuberosum
  • Vicia faba
  • Zea mays
  • faba bean
  • gross benefit
  • land equivalent ratio
  • maize
  • planting date
  • planting geometry

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Authors

  • Walter Roder

  • Eugen Anderhalden

  • Pusparaj Gurung

  • Penjor Dukpa

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