Rationalising mixed cropping under indigenous conditions: The example of Northern Nigeria

Norman, David

doi:10.1080/00220387408421509

Cited by 136 publications

(94 citation statements)

References 7 publications

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“…Most mixtures were made up of two or three crop species (Table 5) (Table 5). This contrasts the findings of Norman (1974). Who reported that Millet + Sorghum Combination was the most common, though he noted that the composition of mixtures depends largely on rainfall.…”

Section: Enterprise Diversificationcontrasting

confidence: 55%

Factors Influencing Farmers Diversification of Their Cropping Enterprises: A Case Study of Sabon Gari Local Government Area of Kaduna State, Nigeria. By

Kaduna¹

2013

IOSR-JAVS

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Section: Enterprise Diversificationcontrasting

confidence: 55%

Factors Influencing Farmers Diversification of Their Cropping Enterprises: A Case Study of Sabon Gari Local Government Area of Kaduna State, Nigeria. By

Kaduna¹

2013

IOSR-JAVS

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“…However, if the cash return is calculated per unit of draught power, the cost of the extra draught power used by farmers when intercropping was more than recovered because intercropping returned significantly more cash than shared monocropping. These results support the findings of Nigerian studies (Norman, 1974) which showed that in spite of a larger cereal grain yield per hectare from monocropping, farmers preferred intercropping because it produced a greater cash return to the more limiting resource, which in the Nigerian work was labour. Furthermore, cash returns to labour were greater even though intercropping required more labour per unit land area.…”

Section: Intercropping Advantagesupporting

confidence: 94%

Intercropping Sorghum with Cowpea in Dryland Farming Systems in Botswana. I. Field Experiments and Relative Advantages of Intercropping

Lightfoot¹,

Tayler

1987

Ex. Agric.

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The intercropping objective of the subsistence fanner in Botswana was identified as a need to secure some cowpea production without reducing the yield of the staple crop, sorghum. Field experiments in which sorghum and cowpea were intercropped in several different environments over three years met this objective on most occasions, but cowpea yields were low compared with their sole crop performance. Although intercropping out-performed monocropping by producing some cowpea yield, land equivalent ratios greater than one and higher gross income and cash returns to draught-power (but not returns to labour) the differences were never large and seldom statistically significant.C. W. F. Lightfoot y R. S. Tayler: Cultivo intercalado de sorgo con caupi en sistemas de cultivos de secano en Botsuana. I. Experimentos de campo y ventajas relativas del intercalado. RESUMENEl objetivo del cultivo intercalado del agricultor de subsistencia en Botsuana fue identificado como una necesidad de asegurar una production de caupis sin reducir el rendimiento del cultivo basico, el sorgo. Experimentos de campo en que se intercalaron sorgo y caupi' en varios ambientes distintos a lo largo de tres anos lograron este objetivo en la mayon'a de los casos, pero los rendimientos de caupi eran bajos comparado con los resultados del monocultivo. Aunque el intercalado supero el monocultivo, produciendo algun rendimiento de caupi, relaciones equivalentes de tierra mayores a uno, y mayores ingresos brutos y ganancias efectivas de la traccion animal (pero no ganancias de la mano de obra), las diferencias nunca fueron grandes y rara vez estadi'sticamente significativas.The poor adoption of monocropping systems by farmers in most African countries has revived research interest in intercropping systems. This revival continues largely because research has demonstrated that intercropping can have many advantages over monocropping. In Botswana, as elsewhere in Africa, only a few farmers have adopted monocropping despite it being an early focus of research and extension efforts. This study examines the characteristics of a sorghum-cowpea intercropping system under the farming conditions of Botswana.Intercropping reviews by Kass (1978), Willey (1979) and Steiner (1982) show that intercropping can increase total grain yield, but closer inspection of the limited sorghum-cowpea data reveals that both increases (Rao and Willey, 1980;Singh, 1981) and decreases (Mafra

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“…. The stability of combined cereal-cowpea intercropping systems has been studied in Brazil (Fans et al ., 1983), Botswana (Lightfoot & Taylor, 1987) and Nigeria (Norman, 1974) but there has been limited study of the yield stability of cowpea cultivars in sole and intercropped systems . Ntare and Aken'ova (1985) studied the yield stability of segregating cowpea populations in Nigeria and Niger, and established that selection for environmental adaptability in early generations was possible .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of yield stability of cowpea under sole and intercrop management in Nigeria

et al. 1991

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Nine cowpea (Vigna unguiculata (L .) Walp .) breeding lines were grown in 13 experiments under sole crop and intercrop management, with and without insecticide application, in Nigeria . Cowpea was intercropped with cassava (Manihot esculenta Cranz), maize (Zea mays L.) and maize-cassava in the forest zone and with sorghum (Sorghum bicolor Moench .) and millet (Pennisetum glaucum (L .) R.Br.) in the savanna zone . Line by cropping system interactions were significant in 5 of 13 experiments and line by insecticide treatment interactions were significant in 2 of 13 experiments . Cowpea yield was severely depressed in intercropped plots and in plots to which no insecticide was applied . Among-environment variation in cowpea yield was greater when no insecticide was applied . Within each management treatment, the yield performance and stability of the cowpea lines was examined . Stability was assessed both by examining among-environment coefficients of variation and by regression analysis . Several of the breeding lines evaluated appeared promising under different levels of management and in a diversity of environments .

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Rationalising mixed cropping under indigenous conditions: The example of Northern Nigeria

Cited by 136 publications

References 7 publications

Factors Influencing Farmers Diversification of Their Cropping Enterprises: A Case Study of Sabon Gari Local Government Area of Kaduna State, Nigeria. By

Factors Influencing Farmers Diversification of Their Cropping Enterprises: A Case Study of Sabon Gari Local Government Area of Kaduna State, Nigeria. By

Intercropping Sorghum with Cowpea in Dryland Farming Systems in Botswana. I. Field Experiments and Relative Advantages of Intercropping

Evaluation of yield stability of cowpea under sole and intercrop management in Nigeria

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