The response of bread wheat to N and P application under improved drainage on bichena vertisols in North-Western Ethiopia
Material type:
TextPublication details: Addis Ababa (Ethiopia) CIMMYT : 1999ISBN: - 92-9146-058-3
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| Conference proceedings | CIMMYT Knowledge Center: John Woolston Library | CIMMYT Publications Collection | Look under series title (Browse shelf(Opens below)) | 1 | Available | Y629146 |
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| Look under series title An agronomic and economic analysis of a long-term wheat-based crop rotation trial in Ethiopia | Look under series title Determination of economic threshold densities for the mayor weed species competing with bread wheat in Ethiopia | Look under series title Determination of economic optimum fertilizer levels using discrete and continuous analytical methods | Look under series title The response of bread wheat to N and P application under improved drainage on bichena vertisols in North-Western Ethiopia | Look under series title Pre- and post-emergence herbicides for irrigated wheat in Ethiopia | Look under series title Yield potential and weather risk associated with wheat production in Ethiopia | Look under series title Screening advanced bread wheat lines for grain yield potential under grass weed infestation |
A multi-location wheat fertilizer response trial was conducted on farmers' fields on the poorly drained Vertisols of Bichena in north-western Ethiopia during 1996 and 1997. The principal objective of the trial was to determine economic optimum rates of N and P fertilizer for the high-yielding semi-dwarf bread wheat cultivar HAR 1685, using an improved drainage technology known as broad bed and furrow (BBF). The results indicate an extremely high grain yield response to N and a lesser, but significant, response to P. Bread wheat exhibited a high agronomic efficiency (AE) of N response: even at 138 kg N ha-l, AE exceeded 14 kg grain per kg applied N. The highest mean grain yield, 3317 kg ha-l, was obtained with the application of 138-92 kg N-P2O5 ha-l, representing a yield increase of 2336 kg ha-1 over the control (i.e., nil fertilizer) treatment. All crop parameters responded more to N than to P fertilizer. Under two contrasting cost/price scenarios, partial budget analysis indicated that 138-46 kg N-P205 ha-1 was the most profitable of the nutrient combinations tested. Optimum nutrient rates based on continuous economic analysis of the grain yield response surface were not in agreement with the results of the discrete analysis, primarily because of the high degree of linearity on response and the significant N by P interaction.
English
0007|AGRIS 0101|R99-00CIMPU|AL-Wheat Program
Jose Juan Caballero
CIMMYT Publications Collection