Comparing the effectiveness of fertilizers

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

The effectiveness of different sources of the same nutrient should be compared using plots of yield versus fertilizer applied to find how much more of the less-effective source is needed to provide the same yield. This gives the same result as measuring the relative response to the two fertilizers - provided response is defined as the instantaneous slope of the yield-fertilizer curve rather than the yield produced by a given amount of fertilizer. In most cases, and especially for immobile nutrients, the relative effectiveness, measured as suggested, will not be affected by the level of application. It is reasonable to assume this simple case until this assumption can be disproved - rather than assuming a more complicated case in the first instance.

Original languageEnglish
Pages (from-to)85-90
Number of pages6
JournalFertilizer Research
Volume8
Issue number1
DOIs
Publication statusPublished - 1 Feb 1985
Externally publishedYes

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title = "Comparing the effectiveness of fertilizers",
abstract = "The effectiveness of different sources of the same nutrient should be compared using plots of yield versus fertilizer applied to find how much more of the less-effective source is needed to provide the same yield. This gives the same result as measuring the relative response to the two fertilizers - provided response is defined as the instantaneous slope of the yield-fertilizer curve rather than the yield produced by a given amount of fertilizer. In most cases, and especially for immobile nutrients, the relative effectiveness, measured as suggested, will not be affected by the level of application. It is reasonable to assume this simple case until this assumption can be disproved - rather than assuming a more complicated case in the first instance.",
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Comparing the effectiveness of fertilizers. / Barrow, N. J.

In: Fertilizer Research, Vol. 8, No. 1, 01.02.1985, p. 85-90.

Research output: Contribution to journalArticle

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T1 - Comparing the effectiveness of fertilizers

AU - Barrow, N. J.

PY - 1985/2/1

Y1 - 1985/2/1

N2 - The effectiveness of different sources of the same nutrient should be compared using plots of yield versus fertilizer applied to find how much more of the less-effective source is needed to provide the same yield. This gives the same result as measuring the relative response to the two fertilizers - provided response is defined as the instantaneous slope of the yield-fertilizer curve rather than the yield produced by a given amount of fertilizer. In most cases, and especially for immobile nutrients, the relative effectiveness, measured as suggested, will not be affected by the level of application. It is reasonable to assume this simple case until this assumption can be disproved - rather than assuming a more complicated case in the first instance.

AB - The effectiveness of different sources of the same nutrient should be compared using plots of yield versus fertilizer applied to find how much more of the less-effective source is needed to provide the same yield. This gives the same result as measuring the relative response to the two fertilizers - provided response is defined as the instantaneous slope of the yield-fertilizer curve rather than the yield produced by a given amount of fertilizer. In most cases, and especially for immobile nutrients, the relative effectiveness, measured as suggested, will not be affected by the level of application. It is reasonable to assume this simple case until this assumption can be disproved - rather than assuming a more complicated case in the first instance.

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