Wild migrating sockeye salmon Oncorhynchus nerka exposed to 20, 50 and 80 mg l 1 of clove oil could be handled within 3 min, recovered within 10 min, and survived 15 min exposure trials. Fish tested at 110 mg l 1 did not recover from 15 min exposure trials. Response curves developed for induction and recovery time considered the following predictors: clove oil concentration, sex, fish length and depth. A significant positive dependence was observed between induction time and fish length for 20, 50 and 80 mg l 1 test concentrations; no dependence was observed between induction time and length at 110 and 140 mg l 1 . Recovery time differed as a function of clove oil concentration, but not fish size. A concentration of 50 mg l 1 is recommended for anaesthetizing sockeye salmon ranging in length from 400 to 550 mm at water temperatures averaging 9-10 C.

A study of the behavior and transport by the Columbia River of the eleven radionuclides 46Sc, 51Cr, 54Mn, 58Co, 59F9Fe, 60Co, 65Zn, 95Zr‐96Nb, 106Ru, 124Sb, and 140Ba was carried out in the river reach between Pasco and Vancouver, Washington, during the period January 1964 through January 1965. This study was accomplished by direct counting of water salts and filter samples on a multidimensional gamma‐ray spectrometer and represents the first measurements of the interactions of most of these radionuclides in the river. Through this multiple tracer technique, the specific and relative behaviors of these radionuclides in regard to their sorption by and movement with suspended particulate matter in the Columbia River were determined. Depletion of these radionuclides from the river during transport and the radionuclide inventory in the stream bed for the river reach between Pasco and Vancouver were also estimated.

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Synopsis Residual N from NH4NO3 averaged 44% of the original application after 1 year but was insignificant after 2 years. For a 5‐year period, N uptake from the alfalfa area exceeded that from virgin area by 341 pounds per acre.