Soil N balance as affected by soybean maturity class in the Guinea savanna of Nigeria

Singh, Ajit; Carsky, R. J.; Lucas, E. O.; Dashiell, Kenton E.

doi:10.1016/s0167-8809(03)00193-2

Cited by 21 publications

(16 citation statements)

References 20 publications

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“…This is within the range for cowpea and soybean (between 25 and 80%) reported by other studies (Okereke and Eaglesham 1993;Sanginga et al 1997;Okogun et al 2005;Chikowo et al 2006). Furthermore, medium-and long-duration grain legumes derive a greater proportion of their N from the atmosphere than short-duration varieties (Sanginga et al 1997;Singh et al 2003).…”

Section: Discussionmentioning

confidence: 99%

A comparison between legume technologies and fallow, and their effects on maize and soil traits, in two distinct environments of the West African savannah

Franke

Laberge

Oyewole

et al. 2008

Nutr Cycl Agroecosyst

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Legume-maize rotation and maize nitrogen (N)-response trials were carried out simultaneously from 1998 to 2004 in two distinct agro-ecological environments of West Africa: the humid derived savannah (Ibadan) and the drier northern Guinea savannah (Zaria). In the N-response trial, maize was grown annually receiving urea N at 0, 30, 60, 90 and 120 kg N ha -1. In Ibadan, maize production increased with N fertilization, but mean annual grain yield declined over the course of the trial. In Zaria, no response to N treatments was observed initially, and an increase in the phosphorus (P) and sulphur (S) fertilizer application rate was required to increase yield across treatments and obtain a response to N applications, stressing the importance of non-N fertilizers in the savannah. In the rotation trial, a 2-year natural fallowmaize rotation was compared with maize rotated with different legume types: green manure, forage, dualpurpose, and grain legumes. The cultivation of some legume types resulted in a greater annual maize production relative to the fallow-maize combination and corresponding treatments in the N-response trial, while there was no gain in maize yield with other legume types. Large differences in the residual effects from legumes and fallow were also observed between sites, indicting a need for site-specific land management recommendations. In Ibadan, cultivation of maize after the forage legume (Stylosanthes guianensis) achieved the highest yield. The natural fallow-maize rotation had improved soil characteristics (Bray-I P, exchangeable potassium, calcium and magnesium) at the end of the trial relative to legume-maize rotations, and natural fallow resulted in higher maize yields than the green manure legume (Pueraria phaseoloides). In Zaria, maize following dual-purpose soybean achieved the highest mean yield. At both sites, variation in aboveground N and P dynamics of the legume and fallow vegetation could only partly explain the different residual effects on maize.

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Section: Discussionmentioning

confidence: 99%

A comparison between legume technologies and fallow, and their effects on maize and soil traits, in two distinct environments of the West African savannah

Franke

Laberge

Oyewole

et al. 2008

Nutr Cycl Agroecosyst

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“…This study underlined that N budgets associated with soybean cultivation improve if belowground N pools are taken into account. So far, N budgets have been constructed for soybean in the Guinean savannah without taking rhizodeposited N into account (Eaglesham et al 1982;Sanginga et al 1997Sanginga et al , 2002Singh et al 2003;Ogoke et al 2003). The N budgets obtained from these studies were always negative if residues were removed from the field.…”

Section: N Budgetsmentioning

confidence: 99%

“…According to previous studies, soybean cultivation results in a net N drain, if all residues are removed from the field. If residues are retained, soybean N budgets range from -35 to ?50 kg N ha -1 depending on the cultivar and environmental conditions (Eaglesham et al 1982;Sanginga et al 1997Sanginga et al , 2002Ogoke et al 2003;Singh et al 2003). On-farm, these residues may be consumed by livestock and some of the legume N is thus returned to the field when the manure is recycled (Harris 1998); a situation seldom reproduced in experiments on-station.…”

mentioning

confidence: 99%

Nitrogen rhizodeposition from soybean (Glycine max) and its impact on nutrient budgets in two contrasting environments of the Guinean savannah zone of Nigeria

Laberge

Franke

Høgh‐Jensen

2008

Nutr Cycl Agroecosyst

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Nitrogen (N) rhizodeposition by grain legumes such as soybean is potentially a large but neglected source of N in cropping systems of SubSaharan Africa. Field studies were conducted to measure soybean N rhizodeposition in two environments of the Guinean savannah of Nigeria using 15 N leaf labelling techniques. The first site was located in Ibadan in the humid derived savannah. The second site was in Zaria in the drier Northern Guinean savannah. Soybean N rhizodeposition in the top 0.30 m of soil varied from 7.5 kg ha -1 on a diseased crop in Ibadan to 33 kg ha -1 in Zaria. More than two-thirds of soybean belowground N was contained in the rhizodeposits at crop physiological maturity, while the rest was found in the recoverable roots. Belowground plant-derived N was found to constitute 16-23% of the total soybean N. Taking rhizodeposited pools into account led to N budgets close to zero when all residues were removed. If residues were left in the field or recycled as manure after being fed to steers, soybean cultivation led to positive N budgets of up to ?95 kg N ha -1 . The role and potential of grain legumes as N purveyors have been underestimated in the past by neglecting the N contained in their rhizodeposits.

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“…It is a main nutritious crop and there are three cultivated species (V. textilis, V. pubescens, and V. sinensis). This leguminous crop is being cultivated throughout the semiarid tropics [1]. This plant is suitable to these climates due to its ability to withstand in drought conditions.…”

Section: Introductionmentioning

confidence: 99%

“…This plant is suitable to these climates due to its ability to withstand in drought conditions. And this crop is a nitrogen fixing plant as well [1]. Cowpea can be consumed in all stages of its growth and can be used to prepare delicious dishes [2] and animal feed [3].…”

Section: Introductionmentioning

confidence: 99%

RESPONSE OF COWPEA (Vigna unguiculata L.Walp) VARIETIES TO PHOSPHORUS LEVELS IN SUDAN SAVANNA OF NIGERIA

Musa

2017

IMRJ

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The study was conducted to determine the response of cowpea varieties to phosphorus levels in the Sudan savannah of Nigeria. The treatments consisted of four cowpea varieties (UAM-09-1051-1, IT99K-573-2-1, IT99K-573-1-1, and TVX 3236) and phosphorus fertilizer (SSP) (0, 20, and 40 kg/ha) which were laid out in a Randomized Complete Block Design (RCBD). The result revealed that application of 40 kg/ha P2O5 statistically recorded the highest grain yield/ha at BUK. No significant phosphorus effect was recorded on grain yield/ha at Bagauda. The findings of the study also revealed that there was significant varietal effect on cowpea growth and yield at both study locations. Higher grain yield was recorded from variety IT99k-573-2-1 (1193.400 kg/ha), followed by variety TVX 3236 (950.900 kg/ha) and IT99k-573-1-1 (776.500 kg/ha) at BUK while no significant effect of variety was recorded at Bagauda. The result of the simple correlation analysis revealed significant negative and positive association between growth and yield parameters. Thus based on this findings, application of 40 kg/ha P2O5 can be recommended for better cowpea growth and yield. Similarly, variety IT99k-573-2-1 can be recommended for both locations.

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Soil N balance as affected by soybean maturity class in the Guinea savanna of Nigeria

Cited by 21 publications

References 20 publications

A comparison between legume technologies and fallow, and their effects on maize and soil traits, in two distinct environments of the West African savannah

A comparison between legume technologies and fallow, and their effects on maize and soil traits, in two distinct environments of the West African savannah

Nitrogen rhizodeposition from soybean (Glycine max) and its impact on nutrient budgets in two contrasting environments of the Guinean savannah zone of Nigeria

RESPONSE OF COWPEA (Vigna unguiculata L.Walp) VARIETIES TO PHOSPHORUS LEVELS IN SUDAN SAVANNA OF NIGERIA

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