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Head lettuce growth and nutrient absorption studies indicate need for re-evaluation of fertilizer practices

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Authors

F. W. Zink
M. Yamaguchi, University of California

Publication Information

California Agriculture 17(6):13-14.

Published June 01, 1963

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Abstract

In Salinas Valley trials, Great Lakes lettuce produced more than 70% of its fresh weight during the 21 days before first harvest—and absorbed over 70% of the total nutrient uptake of the crop during the same period. These results indicate that the practice of some growers using a preplant application of from one-half to two-thirds of the total amount of nitrogen to produce the crop is questionable. Since lettuce absorbs little nitrogen in the early phase of growth, a more realistic program would include preplant applications of only one-fourth the amount of total nitrogen to be used and two side-dressings to apply the balance—one after thinning and a second a month before the predicted first harvest.

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Head lettuce growth and nutrient absorption studies indicate need for re-evaluation of fertilizer practices

F. W. Zink, M. Yamaguchi
Webmaster Email: wsuckow@ucanr.edu

Head lettuce growth and nutrient absorption studies indicate need for re-evaluation of fertilizer practices

Share using any of the popular social networks Share by sending an email Print article
Share using any of the popular social networks Share by sending an email Print article

Authors

F. W. Zink
M. Yamaguchi, University of California

Publication Information

California Agriculture 17(6):13-14.

Published June 01, 1963

PDF  |  Citation  |  Permissions

Author Affiliations show

Abstract

In Salinas Valley trials, Great Lakes lettuce produced more than 70% of its fresh weight during the 21 days before first harvest—and absorbed over 70% of the total nutrient uptake of the crop during the same period. These results indicate that the practice of some growers using a preplant application of from one-half to two-thirds of the total amount of nitrogen to produce the crop is questionable. Since lettuce absorbs little nitrogen in the early phase of growth, a more realistic program would include preplant applications of only one-fourth the amount of total nitrogen to be used and two side-dressings to apply the balance—one after thinning and a second a month before the predicted first harvest.

Full text

Full text is available in PDF.

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