Advances in Agronomy, Vol. 27 by N.C. Brady (Ed.)

By N.C. Brady (Ed.)

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DRAGAN-BULARDA, AND D. 1. Components of the enzyme activity in soil. Components of the enzyme activity of soil' can be classified as shown in Fig. 1 . Activity of most soil enzymes is assayed in samples in which the proliferation of microorganisms is prevented by the addition of toluene or the microorganisms are killed by irradiation with 7-rays or an electron beam. Enzyme activity determined under these conditions is due to the accumulated enzymes. Dehydrogenase activity in soil is assayed without preventing microbial proliferation.

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NO. 24, pp. 81-89. Frank, A. ,Power, J. , and Willis, W. 0. 1973. Agron. 1. 65, 777-783. Fry, K. E. 1970. Plant Physiol. 45, 465-469. Fry, K. E. 1972. Crop Sci. 12, 698-701. Goode, J. , and Higgs, K. H. 1. Hort. Sci. 48, 203-215. Greacen, E. , and Oh, J. S . 1972. Nature (London), N e w Biol. 235, 24-25. Hsiao, T. C. 1973. Annu. Rev. Plant Physiol. 24, 519-570. , and Aspinall, D. 1970. Ann. Bot. ]34, 393-408. Jordan, W. , and Ritchie, J. T. 1971. Plant Physiol. 48, 783-788.. Keck, R. , and Boyer, J.

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