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Organic matter management: From science to practice

By: Palm, C.A | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico).
Contributor(s): Carter, S.E [coaut.] | Murwira, H.K [coaut.] | Waddington, S.R.|Murwira, H.K.|Kumwenda, J.D.T.|Hikwa, D.|Tagwira, F [eds.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Harare (Zimbabwe) Soil Fert Net|CIMMYT : 1998ISBN: 970-648-006-4.Subject(s): Africa | Crop management | Organic matter | Research | Soil deterioration | Southern Africa | CIMMYT | Soil Fert Net | Soil fertility AGROVOC | Farming systems AGROVOCDDC classification: 631.45 Summary: Organic inputs have provided the main source of nutrient for crops in most traditional farming systems in Africa. Organic materials influence nutrient availability by nutrients added, through mineralization-immobilization patterns, as an energy source for microbial activities, as precursors to soil organic matter, and by reducing phosphorus sorption of the soil. These organic nutrient sources are increasingly being produced in insufficient quantities and qualities to meet crop demands, however. The shortfall in nutrient supply is often met from applications of inorganic fertilisers where available.|The challenge is to combine organics of differing quality with mineral fertilisers to optimise nutrient availability to plants. A systematic framework for investigating the combined use of organic and inorganic nutrient sources includes farm surveys, characterization of the quality of organic materials, assessment of the fertilizer equivalency value based on the quality of organics, and experimental designs for determining optimal combinations of nutrient sources. The desired outcome are tools that can be used by researchers, extensionists, and farmers for assessing options of using scarce resources for maintaining soil fertility and improving crop yields.|Collection: CIMMYT Publications Collection
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Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection 631.45 WAD (Browse shelf) 1 Available E628739
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Organic inputs have provided the main source of nutrient for crops in most traditional farming systems in Africa. Organic materials influence nutrient availability by nutrients added, through mineralization-immobilization patterns, as an energy source for microbial activities, as precursors to soil organic matter, and by reducing phosphorus sorption of the soil. These organic nutrient sources are increasingly being produced in insufficient quantities and qualities to meet crop demands, however. The shortfall in nutrient supply is often met from applications of inorganic fertilisers where available.|The challenge is to combine organics of differing quality with mineral fertilisers to optimise nutrient availability to plants. A systematic framework for investigating the combined use of organic and inorganic nutrient sources includes farm surveys, characterization of the quality of organic materials, assessment of the fertilizer equivalency value based on the quality of organics, and experimental designs for determining optimal combinations of nutrient sources. The desired outcome are tools that can be used by researchers, extensionists, and farmers for assessing options of using scarce resources for maintaining soil fertility and improving crop yields.|

English

9906|AGRIS 9902|R98-99ANALY

Jose Juan Caballero

CIMMYT Publications Collection

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Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org