Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 412956
Title The effect of potash fertilization on dry matter production of permanent pasture throughout the season
Author(s) Vries, P. de; Wit, C.T. de
Source Potash Review 30 (1959)12. - p. 1 - 7.
Department(s) Wageningen University
Publication type Refereed Article in a scientific journal
Publication year 1959
Abstract Varying amounts of potassium were applied five times a year to a permanent pasture on sandy soil, a different part of the field being chosen on each occasion. The potassium availability of the soil at the time of potassium application was kept at approximately the same level. The effect and after-effect on yield and K20 uptake ofthe potash fertilization is studied. The uptake-yield curves, the fertilizer rate-uptake curves and the fertilizer rate-yield curves of this first to fifth cut are shown in the first, fourth and second quadrant offigure 1. It is found that: a) the relation between uptake and yield differed in successive cuts, but was the same as regards the effect and after-effect of the potassium dressing; b) the effect of potash fertilization in autumn depended to a large extent on the withdrawal of potassium with previous cuts; c) the existence of a causal relation between temperature and the effect of potassium fertilization is not proved; d) the availability of potassium at a K-value of about 16 was almost sufficient to enable any growth to take place; e) the uptake from soil was not determined by growth; f) the recovery of the potassium fertilizer was to a large extent dependent on growth; g) except for the first cut, the uptake was greater than that needed for reasonable growth; h) the most favourable treatment would have been a dressing of about 200 kg K20 per ha in spring only.
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