REFERENCE SUFFICIENCY RANGES
VEGETABLE CROPS
 |
Cucumber |
C. R. Campbell |
None established.
The most recent mature or fully expanded leaf is the best indicator sample for all growth stages. This is generally the 4th or 5th leaf from a growing point.
A sample containing 15 to 20 leaves generally represents a uniform field well.
Problem sampling is done any time during the growing season. Comparative "good" and "bad" samples help to pinpoint problems.
Samples to monitor nutrient levels are taken at two-week intervals beginning two weeks prior to bloom and continuing throughout fruiting.
Samples are shipped to the laboratory in paper containers.
| Macronutrients | |||||
| N | P | K | Ca | Mg | S |
| 4.0–5.0% | 0.3–1.0% | 3.0–4.0% | 1.2–2.0% | 0.25–1.00% | 0.20–0.75% |
| Micronutrients | ||||
| Fe | Mn | Zn | Cu | B |
| 50–300 ppm | 25–250 ppm | 20–200 ppm | 5–60 ppm | 25–85 ppm |
| Important Ratios |
| The N:S ratio should be less than 18. |
| The N:K ratio should be 1.2 to 1.8. |
DRIS norms have not been reported for cucumber.
Sufficiency ranges were developed from available references and experience reviewing analytical results.
Mills HA, Jones JB Jr. 1996. Plant analysis handbook II: a practical sampling, preparation, analysis, and interpretation guide. Athens (GA): Micro-Macro Publishing.
Plank CO. 1989. Plant analysis handbook for Georgia. Athens (GA): University of Georgia Cooperative Extension Service. 64 p.
Electronic Document Prepared by:
Catherine Stokes, Communication Specialist
Agronomic Division of the N.C. Department of Agriculture and Consumer Services. July 2000.