Articles
YIELD AND QUALITY OF PLASTIC HOUSE SNAP BEANS (PHASEOLUS VULGARIS L.) PRODUCED BY CONVENTIONAL, ORGANIC AND GOOD AGRICULTURAL PRACTICES (GAP) IN THE JORDAN VALLEY
Article number
797_57
Pages
399 – 404
Language
English
Abstract
This study evaluates conventional, good agricultural practices (GAP), and organic farming systems of bean (Phaseolus vulgaris L.), Terrli variety grown under plastic house conditions in the Jordan Valley during the (20042005) growing season.
Moreover, two plant densities (3 and 6 plants per m2 in main plots) and three fertilizer levels (compost only, compost and chemical and chemical source only for organic, GAP and for conventional farming system respectively in the sub main plots) were replicated three times in a split plot design.
Leaf area was significantly the largest in the organic, the smallest in the conventional, and the medium in the GAP farming system.
Snap beans yields of all systems were not significantly different early in the season, with similarity of conventional and GAP yields at mid, late and total yields.
However, yield of organic system was significantly lower than the other two systems at mid, late and total seasonal periods, which were 82, 90 and 86%, respectively, of those of the conventional system.
Generally, organic farming system demonstrated statistical superiority in minerals (macro and micronutrients) of bean plants over those of either GAP or conventional systems.
Organic beans, particularly pods, leaves and shoots had the lowest nitrate contents among the three farming systems; in contrast, conventional beans pods, seeds, leaves and shoots contained the highest nitrate residues.
Organic system contributed noticeably in improving soil quality properties, including soil organic matter, total N and available K, while the most soil P increment was in the GAP system.
A shift to organic and/or to GAP farming system/s would induce better food quality and improve soil nutritional status.
Moreover, two plant densities (3 and 6 plants per m2 in main plots) and three fertilizer levels (compost only, compost and chemical and chemical source only for organic, GAP and for conventional farming system respectively in the sub main plots) were replicated three times in a split plot design.
Leaf area was significantly the largest in the organic, the smallest in the conventional, and the medium in the GAP farming system.
Snap beans yields of all systems were not significantly different early in the season, with similarity of conventional and GAP yields at mid, late and total yields.
However, yield of organic system was significantly lower than the other two systems at mid, late and total seasonal periods, which were 82, 90 and 86%, respectively, of those of the conventional system.
Generally, organic farming system demonstrated statistical superiority in minerals (macro and micronutrients) of bean plants over those of either GAP or conventional systems.
Organic beans, particularly pods, leaves and shoots had the lowest nitrate contents among the three farming systems; in contrast, conventional beans pods, seeds, leaves and shoots contained the highest nitrate residues.
Organic system contributed noticeably in improving soil quality properties, including soil organic matter, total N and available K, while the most soil P increment was in the GAP system.
A shift to organic and/or to GAP farming system/s would induce better food quality and improve soil nutritional status.
Publication
Authors
S. Abubaker, Y. Al-Zu’bi, M. Kasrawi, A. Aburayyan
Keywords
farming systems, organic, EurepGAP, conventional, snap beans
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