Abstract
From 1973–1985 the effects of short crop rotations and continuous cropping were investigated on potato yield and on changes in chemical, physical and biological soil fertility on a marine loam soil in Lelystad. From 1981–1984 the net yield of potato cv. Saturna in a two-course crop rotation with sugar beet (soil fumigated every two years) was 97% of the yield of potatoes in a three-course crop rotation (soil not fumigated). With additional organic manure in the two-course rotation the yield increased to 99%. In continuous cropping with organic manure and soil fumigation every two years the net yield decreased significantly, to 81% of the three-course rotation. Changes in chemical and physical soil fertility were due to the organic manure rather than to the cropping frequency.
Incidences of soil-borne organisms including Verticillium dahliae, Rhizoctonia solani, Pratylenchus spp. and Agrotis spp. were determined. The V. dahliae inoculum potential in soil of a three-course rotation decreased in the two years without potato. In August V. dahliae caused less early dying of the potato crop in the three-course rotation (disease index 21) than in the two-course rotation (disease index 30) and in continuous cropping (disease index 51). At the end of the season most of the potato stems had microsclerotia of V. dahliae in all rotations. From 1976–1978 more R. solani was found on stems and tubers in continuous cropping and in the two-course rotation than in the three-course rotation. In later years, the disease declined in continuous cropping of potato and differences between rotations disappeared.
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© 1989 Kluwer Academic Publishers
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Lamers, J.G. (1989). Twelve Years of Continuous Cropping and Short Rotations of Potato at the ‘PAGV1’ Experimental Site. In: Vos, J., Van Loon, C.D., Bollen, G.J. (eds) Effects of Crop Rotation on Potato Production in the Temperate Zones. Developments in Plant and Soil Sciences, vol 40. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2474-1_4
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DOI: https://doi.org/10.1007/978-94-009-2474-1_4
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