AGRIS

Data provider:

Icon data provider

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.

Active (Data provider submitted metadata in the last calendar year)
Journal Article

Journal Article

Declining Fruit and Vegetable Nutrient Composition: What Is the Evidence?  [2009]

Davis, Donald R.;

Access the full text

  • NOT AVAILABLE
Three kinds of evidence point toward declines of some nutrients in fruits and vegetables available in the United States and the United Kingdom: 1) early studies of fertilization found inverse relationships between crop yield and mineral concentrations--the widely cited "dilution effect"; 2) three recent studies of historical food composition data found apparent median declines of 5% to 40% or more in some minerals in groups of vegetables and perhaps fruits; one study also evaluated vitamins and protein with similar results; and 3) recent side-by-side plantings of low- and high-yield cultivars of broccoli and grains found consistently negative correlations between yield and concentrations of minerals and protein, a newly recognized genetic dilution effect. Studies of historical food composition data are inherently limited, but the other methods can focus on single crops of any kind, can include any nutrient of interest, and can be carefully controlled. They can also test proposed methods to minimize or overcome the diluting effects of yield whether by environmental means or by plant breeding.
From the journal
HortScience : a publication of the American Society for Horticultural Science
ISSN : 0018-5345

Bibliographic information

Language:
English
Type:
Other
In AGRIS since:
2013
Volume:
44
Issue:
1
Start Page:
15
End Page:
19
All titles:
"Declining Fruit and Vegetable Nutrient Composition: What Is the Evidence?"@eng
Other:
"Paper presented at the colloquium "Crop yield and quality: Can we maximize both?" held July 18, 2007, in Scottsdale, Arizona. Includes references"
Loading...

Bibliographic information

Language:
English
Type:
Other
In AGRIS since:
2013
Volume:
44
Issue:
1
Start Page:
15
End Page:
19
All titles:
"Declining Fruit and Vegetable Nutrient Composition: What Is the Evidence?"@eng
Other:
"Paper presented at the colloquium "Crop yield and quality: Can we maximize both?" held July 18, 2007, in Scottsdale, Arizona. Includes references"