Productivity of yam under alternative cropping systems adopted by small-holder farmers of southeastern Nigeria

Okorji, E.C.

doi:10.1016/0308-521x(86)90127-7

Cited by 8 publications

(6 citation statements)

References 2 publications

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“…Basically the cover crops provide protective cover against soil erosion and also help to reduce the rate of soil moisture loss through reduced evaporation from the soil surface. Mixed cropping is more popular in southern than in northern Nigeria, even in southeastern Nigeria most (80%) of the farmers grow their crops in mixtures (Okorji, 1986). It has been shown (Table 4) that soil splash under cassava can be drastically reduced when grown in mixture with sweet potato (Ipomoea batata) and maize (Zea mays) (Lal, 1985).…”

Section: Management For Sustainable Agriculture In Nigeria Use Of Orgmentioning

confidence: 99%

Analytical overview of agricultural conditions in Nigeria

Asadu¹

2015

Agro-Sci.

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Nigeria is a tropical country with a population of over 135 million. Over 70% of the population are engaged in agriculture as their primary source of income and despite low investment by the previous governments, it still contributes over 39% of the Gross Domestic Product (GDP). The large land mass, good soil and climatic conditions favour the growth of various crops during the year and the rearing of many animals. Food shortage is a major challenge to the present government apart from political disputes, disturbances in oil producing states in the Niger delta and poor funding of many other sectors particularly agriculture and education. Agricultural (including extension) policies over the years have been elaborate and attractive in most cases but they are only so on papers in the shelves in the government offices. Prospects for improvement and sustainable agricultural productivity exist because of the country's endowment in natural resources especially abundant uncultivated arable lands, favourable climate and soils that are improvable as well as large human labour. These resources if well integrated can help boost agricultural production in the country. The present status demands adequate and prompt attention by all three tiers of government in the country viz: Local, State and Federal governments.

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Section: Management For Sustainable Agriculture In Nigeria Use Of Orgmentioning

confidence: 99%

Analytical overview of agricultural conditions in Nigeria

Asadu¹

2015

Agro-Sci.

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“…Basically, the cover crops provide protective cover against soil erosion and also help to reduce the rate of soil moisture loss through reduced evaporation from the soil surface. Mixed cropping is more popular in southern than in northern Nigeria; even in south-eastern Nigeria most (80%) of the farmers grow their crops in mixtures (Okorji, 1986). It has been shown (Table 4) that soil splash under cassava can be drastically reduced when it is grown in a mixture with sweet potato (Ipomoea batata) and maize (Zea mays) (Lal, 1985b).…”

Section: Use Of Cover Crops/mulchmentioning

confidence: 99%

Land Use and Soil Management Situations in Nigeria

Asadu¹,

Ezeaku²,

Nnaji³

2004

Outlook Agric

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The estimated land area of Nigeria is 904,000 km 2 with a population of over 120 million. The use to which land is put differs from one location to another, especially when the immediate needs of the society or community concerned are not the same. However, the different uses of land revolve around agriculture (crop and animal production), industry (both oil and non-oil) and social needs such as the provision of infrastructure. This analytical review shows that about 65% of the land area of Nigeria is under various forms of food (crop and animal) production and forest plantation. This is categorized as follows: food crop production, 42%; extensive grazing and livestock projects, 21%; plantation (crop, forest, teak), <2%; and agriculture in denuded areas, <1%. From 1976-95 (the only available records) there were substantial changes in land area under intensive and floodplain agriculture (16%), extensive grazing and livestock projects (13%), plantation (>450%) and crop production in denuded areas (>150%). All the forest and grassland regions diminished in area over this period. These probably led to a >1,000% increase in areas under gullies and salty marsh, and >500% in area occupied by sand dunes. Even though these degraded areas occupy <10% of the land area of the country, the rates at which they encroach on more useful land are a dangerous omen for the country's land resources in general and agriculture in particular. Possible soil management solutions to avert these situations are discussed. The paper also highlights the fact that failures in implementation and/or fragmented approaches are the major problems of land use policy in the country, and that these need to be addressed for sustainable development to take off.

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“…Cassava is a food security crop and supplies more than 65% of the calorific energy needs of the people of sub-Saharan Africa including eastern Nigeria (Nweke et al, 2002). It is grown by over 90% of farmers in eastern Nigeria and over 70% grow it in various intercropping (polyculture) systems (IITA, 1984;Okorji, 1986;Asadu, 1997). The most popular crop grown with cassava in the region is maize (Zea mays).…”

Section: Introductionmentioning

confidence: 99%

“…It is often difficult to isolate these factors and determine their individual contributions to crop yield especially in crop mixtures. Most studies on intercropping had often dwelt on its advantages over sole cropping http://dx.doi.org/10.4314/as.v13i2.5 (Andrew, 1972;Okorji, 1986;Asadu, 1997;Kantor, 1999). Soil variables have been reported to account for up to 70% variations in cassava yield (Asadu et al 2002) but climatic elements were not considered.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of cassava-based systems for adaptation to climatic variations in eastern Nigeria

Asadu¹,

Dixon²,

Eze³

2015

Agro-Sci.

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Three cassava-based systems viz: solely cassava (SC), cassava + pigeon pea (C + P) and Cassava + pigeon pea + maize were evaluated for five years using cassava root, shoot yields and their ratio as the index of adaptation to climatic variations. The study was carried out in two locations, one within the University of Nigeria, Nsukka (UNN) farm near the Meteorological station and the other about one km off the Campus and in a newly cleared forestland. The experimental design was a randomized complete block design (RCBD) replicated three times in each location. Three climatic elements (rainfall, temperature and relative humidity) were obtained from the Meteorological station each year. The yields were significantly (p≤0.05) affected by location, year, and the cropping systems. Out of the three climatic variables the relative humidity accounted for about 60% variation in root yield and 56% in shoot yield. Their ratio was not significantly influenced. The highest average root yield (15 t ha -1 ) came from C + P + M plots at forestland location and the least (2.2 t ha -1 ) from C + P plots at the UNN location. Thus, C + P + M mixture was considered the most adapted to the area.

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Productivity of yam under alternative cropping systems adopted by small-holder farmers of southeastern Nigeria

Cited by 8 publications

References 2 publications

Analytical overview of agricultural conditions in Nigeria

Analytical overview of agricultural conditions in Nigeria

Land Use and Soil Management Situations in Nigeria

Evaluation of cassava-based systems for adaptation to climatic variations in eastern Nigeria

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