Permanent Link: http://ufdc.ufl.edu/IR00002713/00001
 Material Information
Title: Supplemental Fertilizer Application in the BMP Era for Vegetable Crops Grown in Florida in the BMP Era
Physical Description: Fact Sheet
Creator: Simonne, Eric
Publisher: University of Florida Cooperative Extension Service, Institute of Food and Agriculture Sciences, EDIS
Place of Publication: Gainesville, Fla.
Publication Date: 2003
Acquisition: Collected for University of Florida's Institutional Repository by the UFIR Self-Submittal tool. Submitted by Melanie Mercer.
Publication Status: Published
General Note: "Publication date: January 2003."
General Note: "HS906"
 Record Information
Source Institution: University of Florida Institutional Repository
Holding Location: University of Florida
Rights Management: All rights reserved by the submitter.
System ID: IR00002713:00001

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HS906 Supplemental Fertilizer Application in the BMP Era for Vegetable Crops Grown in Florida in the BMP Era1 Eric Simonne and George Hochmuth2 1. This document is HS906, one of a series of the Horticultural Sciences Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Publication date: January 2003. Please visit the EDIS Web site at http://edis.ifas.ufl.edu. 2. Eric Simonne, assistant professor, George Hochmuth, center director, NFREC-Quincy, Horticultural Sciences Department, Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, 32611. The Institute of Food and Agricultural Sciences is an equal opportunity/affirmative action employer authorized to provide research, educational information and other services only to individuals and institutions that function without regard to race, color, sex, age, handicap, or national origin. For information on obtaining other extension publications, contact your county Cooperative Extension Service office. Florida Cooperative Extension Service/Institute of Food and Agricultural Sciences/University of Florida/Christine Taylor Waddill, Dean. This publication is one of a series entitled Fertilizer and Irrigation Management in the BMP Era. This series is divided into nine principles described in the Introduction Chapter (HOS-897). This publication is part of Principle 3, "Monitor Crop Nutritional Status and Discover How Healthy the Plants Are." BMP implementation requires a global approach to production management. However, for presentation purposes, each aspect of vegetable production is described in a separate publication. Fertilizers typically contain macronutrients and micronutrients, and are used primarily to obtain higher yields and improve crop quality. If the fertilizer component of the crop nutrient requirement (CNR) is properly managed to minimize fertilizer losses, it is unlikely that additional supplemental fertilizer will be needed. As a general rule, about 50% of the nitrogen and 25% of the potassium are leached out of the root zone by a 2 to 3-inch rainfall for unmulched crops. Working Definition Supplemental fertilizer is the fertilizer that is applied in addition to the crop nutrient requirement during the growing season to replace fertilizer nutrients lost by a leaching rain. Conditions for Application Things to Do Manage CNR properly to avoid leaching losses caused by irrigation. Make a supplemental application of N and/or K when rainfall exceeds 3 inches in 3 days, or 4 inches in 7 days and when plant nutritional status suggests to do so. Application Techniques Things to Do Place the supplemental fertilizer in the soil just ahead of the advancing root tips. For crops growing in close rows or seeded in "broadcast" fashion, the supplemental fertilizer can be broadcast over the top by air, ground spreader, or overhead sprinkler-irrigation system. Where plastic mulch is used, supplemental applications can be made through the mulch with


Supplemental Fertilizer Application in the BMP Era for Vegetable Crops Grown in Florida.... 2 a liquid-injection wheel or the drip irrigation system. Application Amounts Things to Do In general, apply 30 lb of nitrogen per acre of planted cropland. In general, apply 20 lb of potassium (K2O) per acre of planted cropland. Things to Avoid: Potential Pitfalls Avoid adding supplemental or side-dress fertilizer to row crops when a storm event of significant magnitude is forecasted. Additional Reading Soil and Fertilizer Management for Vegetable Production in Florida, HS711, Fla. Coop. Ext. Ser., IFAS, Univ. of Fla. http://edis.ifas.ufl.edu/CV101