1980
DOI: 10.1007/bf01073561
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The fertiliser economy of high producing pastoral systems

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Cited by 9 publications
(4 citation statements)
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“…Table 1 and 2) with the differences being greater with P than with S. In practical farming, response curves to a fertiliser nutrient mixture providing balanced nutrition (e.g., superphosphate providing P and S in balance) may be more relevant than the more commonly researched responses to single nutrients at constant, non-limiting rates of others. Thus, Middleton (1980) has advocated the use of response curves to physiologically balanced nutrient mixtures instead of single nutrients as a basis for determining optimum fertiliser application rates. For assessing P and S status of nutritionally balanced pastures it is therefore preferable to use the adequacy indicators for RY [PS] (Fig.…”
Section: Discussionmentioning
confidence: 99%
“…Table 1 and 2) with the differences being greater with P than with S. In practical farming, response curves to a fertiliser nutrient mixture providing balanced nutrition (e.g., superphosphate providing P and S in balance) may be more relevant than the more commonly researched responses to single nutrients at constant, non-limiting rates of others. Thus, Middleton (1980) has advocated the use of response curves to physiologically balanced nutrient mixtures instead of single nutrients as a basis for determining optimum fertiliser application rates. For assessing P and S status of nutritionally balanced pastures it is therefore preferable to use the adequacy indicators for RY [PS] (Fig.…”
Section: Discussionmentioning
confidence: 99%
“…We could not find such a definition in the literature, although the importance of balanced nutrition is very well recognised (e.g., Walker et al 1955;Middleton 1980Middleton , 1983Janssen et al 1994). The basic tenet of the definition we use in this paper is that the most deficient nutrient is the one whose addition on its own can produce the greatest yield increase.…”
Section: Identifying Balanced Nutritionmentioning
confidence: 93%
“…Middleton (1980) has been severely critical of selecting fertiliser nutrient ratios solely on the basis of economic interpretations of factorial trials, especially when these are of short duration. He showed that the purely economic approach could lead to fertiliser recommendations which were severely imbalanced from a physiological viewpoint, and argued that the continued use of such fertiliser mixtures would lead to accumulating excess and consequent imbalance of fertiliser elements in the root-zone which would give results very different from those in the short-term trials.…”
Section: R = S/(s + P)mentioning
confidence: 99%
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