Oakes Irrigation Research
Site
Carrington Research Extension Center * North Dakota State University
P.O. Box 531, Oakes, ND 58474-0531, Voice: (701) 742-2189, FAX: (701)
742-2700, email: rgreenla@ndsuext.nodak.edu
RADISH HYBRID PERFORMANCE TRIAL, 2000
Richard Greenland, Leonard Besemann, and Heidi Eslinger
Table 40. Results of the radish performance trial.
Radishes grow well in North Dakota. During the heat of the summer many varieties become too hard and woody, but there are some varieties now available that grow well during the warmer parts of the summer. Control of cabbage maggot is essential for production of radishes. This year we only tested two varieties of radish in our trials.
MATERIALS AND METHODS
| Soil: | Embden sandy loam; pH=6.7; 2.5% organic matter; soil-P, soil-K, and soil-S were very high. |
| Previous crops: | 1999 - onion; 1998 - pepper; 1997 - fallow. |
| Seedbed preparation: | Disked on 29 October 1999. Multiweeded (field cultivated) on April 5. Multiweeded twice on April 18 to incorporate herbicide/fertilizer and smooth seedbed. |
| Planting: | Direct seeded radish on April 25 with a Stanhay vegetable planter. Radish seeds were planted about 18 seeds per foot in 8-inch rows Seeds were placed ¼ to ¾ inches deep into a flat, fine seedbed. |
| Plots: | Plots were 17 ft long by three rows (24 inches) wide. The study had 4 reps. |
| Fertilizer: | On April 4, broadcast 18 lbs N/acre and 20 lbs S/acre as 21-0-0-24. Sprayed 50 lbs N/acre as 28-0-0 on April 17. |
| Irrigation: | Overhead sprinkler irrigation as needed. |
| Pest Control: | Weeds were controlled using Treflan (1 pt/acre applied preplant incorporated on April 18). Radishes grew vigorously and were harvested before weeds could compete with them, therefore, no additional weed control was needed. Sprayed Sevin (1 qt/acre on May 9) to control flea beetles. |
| Harvest: | A one-foot section of each plot was harvested every one or two days from May 26 until June 12. From these multiple harvests, we selected June 5 as the harvest date that best represented radish performance. |
Both radish varieties were good. Cabernet had numerically higher yields but because of the variability of the data the yields were not statistically higher.
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Table 40. Results of the Oakes Irrigation Research Site 2000 radish performance trial.
| Name | Seed source1 | Early | Yield | |||||
| vigor | stand | X-large2 | Large2 | Medium2 | Small2 | Total | ||
| --- 1 to 10 --- | ------------------ 1000s lbs/acre --------------- | |||||||
| Cabernet | NV | 9.0 a | 9.8 | 11.8 | 6.9 | 2.4 | 0.6 | 22.7 |
| SRA 4505 | SK | 8.0 b | 9.8 | 5.3 | 4.1 | 2.7 | 0.6 | 13.8 |
| C.V. (%) | 0 | 25 | 47 | 34 | 38 | 114 | 30 | |
| Probability | <.0001 | 0.41 | 0.11 | 0.13 | 0.64 | 0.93 | 0.11 | |
1See Appendix A for seed source codes.
2Radish diameters were: X-large - >1¼"; Large - 1 to 1¼"; Medium - ¾ to 1"; Small - to ¾"
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Go to Oakes Irrigation Research Site Variety Performance Trials
Go to Oakes Irrigation Research Site 2000 annual report