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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

Yield-determining processes in relation to cultivar seed size of common bean  [1994]

Sexton, P.J.; White, J.W.; Boote, K.J.;

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Cultivar seed size and yield potential of common bean (Phaseolus vulgaris L.) are negatively associated. Large-seeded cultivars are predominately of Andean background, while small-seeded cultivars are predominately of Mesoamerican background. Crop growth analyses were conducted to examine the association of cultivar seed size with crop growth rate (CGR), seed growth rate (SGR) on a land-area basis, intensity of partitioning to seed (land-area SGR divided by CGR), and effective seed-filling period. Sixteen cultivars, ranging in seed size from 190 to 540 mg seed-1, were grown at two sites in Colombia at elevations of 1000 m (warm) and 1800 m (cool). The seed size groups did not differ in CGR at either site. At the warmer site, the small-seeded Mesoamerican lines had greater mean partitioning to seed (1.29 vs. 0.97 for the Mesoamerican and Andean lines, respectively), greater land-area SGR (11.7 vs. 8.3 g m-2 d-1), and higher yield (2030 vs. 1750 kg ha-1) than did the large-seeded Andean lines. At the cool site, the seed size groups did not differ in any of these variables. At both sites, the Mesoamerican lines flowered approximately 6 d later and acquired more total N than did the Andean lines. It is postulated that the greater land-area SGR and yield of the Mesoamerican lines at the warmer site was due to their greater accumulation of N, which allowed them to sustain greater rates of canopy photosynthesis during seed-filling
From the journal
Crop science (USA)
ISSN : 0011-183X

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
1995
Volume:
34
Issue:
1
Start Page:
84
End Page:
91
All titles:
"Yield-determining processes in relation to cultivar seed size of common bean"@eng
Other:
"references"
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
1995
Volume:
34
Issue:
1
Start Page:
84
End Page:
91
All titles:
"Yield-determining processes in relation to cultivar seed size of common bean"@eng
Other:
"references"