QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Purchase Article View Shopping Cart Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Wittwer, S. H. Articles by Goff, H. R. Search for Related Content PubMed Articles by Wittwer, S. H. Articles by Goff, H. R.

Vegetable Crops in Relation to Soil Fertility

IV. Nutritional Values of New Zealand Spinach¹

Department of Horticulture, Missouri Agricultural Experiment Station, Columbia

New Zealand spinach, compared with other leafy vegetables as a "protective" food, is a poor source for vitamin C.

Its low calcium and magnesium concentrations with an extremely high oxalate content suggest a negative mineral contribution; there is likely a precipitation of quantities of calcium derived from other foods consumed, tantamount to from four to six times that furnished by the plant itself.

The response of the crop to nitrogen fertilization was (1) practically independent of the soil calcium, and (2) reflected by an increased yield of vegetation which generally became progressively inferior in nutritional value with each increment of nitrogen.

New Zealand spinach is at the bottom of the list of green leafy vegetables insofar as its vitamin C and calcium contributions are concerned.

Manuscript received 23 July 1945.