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

Richard G Greenland, Leonard Besemann, and Heidi Kerlin

Result summary

Table 72. Yield and size of raspberries.


This study was established in 1992 on a Maddock sandy loam soil that had been in fallow (or weeds) the previous two years. Spring soil tests showed this site to be high in K, medium in P and low in N. The soil pH was 7.8 and the soil organic matter was 1.3%. The area was disked in the spring of 1992 and 200 lbs of 10-50-0 per acre were incorporated using a multiweeder on April 9.

Three varieties of fall raspberries were planted on 9 April 1992. Raspberry plants were placed 1 ft apart in rows 7 ft apart. Planting was done by digging a 4-inch deep furrow, adding water, and burying the plants as deep as they were at the nursery. Plants were clipped at ground level about one month after planting (it is recommended they be clipped sooner). An additional 33 lbs N per acre as urea was banded along each row on 21 July 1992. All plants grew vigorously the first year with only a couple of plants being lost. Redwing was the most vigorous and Autumn Bliss the least vigorous.

In 1998, plants were flailed between March 27 and April 3, just as soon as the snow melted off each area. Weeds were controlled with Sinbar (2 lbs/acre on April 14 (which was before the raspberries emerged)) and by rototilling between rows. The raspberries were irrigated as needed throughout the summer. Harvest began on August 11 for Redwing and Autumn Bliss, and on August 17 for Heritage. A 10-ft section of row from each variety was harvested.


Red Wing continued to yield better than the other two varieties of raspberries. It was also the most vigorous and best adapted to North Dakota conditions. Red Wing had smaller berries and a strong raspberry flavor. Autumn Bliss seemed to be the least adapted to North Dakota conditions. We are losing some stand. Autumn Bliss has the largest berries and a milder, almost watery, taste. Heritage is the latest maturing of the varieties. Yield is often reduced because the berries don't mature before frost.

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Table 72. Yield and size of raspberries at the Oakes Irrigation Research Site, 1998.
Harvest Date Yield Size
Autumn Bliss Heritage Red Wing Autumn Bliss Heritage Red Wing
-------------- lbs/acre ------------ ------- grams/100 berries -------
11-Aug 257 0 212 260 --- 276
17-Aug 717 100 1379 190 216 229
21-Aug 785 218 1438 234 189 190
26-Aug 1036 733 1357 282 197 186
28-Aug 401 373 715 245 202 175
31-Aug 492 602 720 241 200 163
07-Sep 401 749 482 181 167 128
14-Sep 240 593 209 141 155 131
Totals 4329 3368 6511 Avg. 223 182 183

Note: no statistics were done on these data because it was not a replicated trial.

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Go to Oakes Irrigation Research Site Variety Performance Trials

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