Pasture floristic composition in different Eucalyptus species plantations in some parts of northern Guinea savanna zone of Nigeria

1990 ◽  
Vol 12 (3) ◽  
pp. 257-268 ◽  
Author(s):  
A. B. I. Igboanugo ◽  
J. E. Omijeh ◽  
J. O. Adegbehin
Keyword(s):  
Floristic Composition ◽  
Eucalyptus Species ◽  
Northern Guinea Savanna ◽  
Guinea Savanna ◽  
Savanna Zone

Weed Control in Maize Using Mucuna and Canavalia as Intercrops in the Northern Guinea Savanna Zone of Ghana

2006 ◽  
Vol 5 (4) ◽  
pp. 621-625 ◽  
Author(s):  
Innocent Y.D. Lawso ◽  
Israel K. Dzomeku . ◽  
Robert Asempa . ◽  
Samuel Benson .
Keyword(s):  
Weed Control ◽  
Northern Guinea Savanna ◽  
Guinea Savanna ◽  
Savanna Zone

Utilization of rock phosphate by crops on a representative toposequence in the Northern Guinea savanna zone of Nigeria: response by Mucuna pruriens, Lablab purpureus and maize

2000 ◽  
Vol 32 (14) ◽  
pp. 2063-2077 ◽  
Author(s):  
B. Vanlauwe ◽  
O.C. Nwoke ◽  
J. Diels ◽  
N. Sanginga ◽  
R.J. Carsky ◽  
...  
Keyword(s):  
Rock Phosphate ◽  
Mucuna Pruriens ◽  
Lablab Purpureus ◽  
Northern Guinea Savanna ◽  
Guinea Savanna ◽  
Savanna Zone

Rice Influence on Grain Yield of Maize in Maize/Rice Mixture in the Northern Guinea Savanna Zone of Ghana

2012 ◽  
Vol 26 (1) ◽  
pp. 87-100 ◽  
Author(s):  
J. M. Kombiok ◽  
S. S. J. Buah ◽  
I. K. Dzomeku
Keyword(s):  
Grain Yield ◽  
Northern Guinea Savanna ◽  
Guinea Savanna ◽  
Savanna Zone

Maize/Herbaceous Legume Inter-Crops and Soil Properties in the Northern Guinea Savanna Zone, Nigeria

2002 ◽  
Vol 20 (1) ◽  
pp. 15-25 ◽  
Author(s):  
A. C. Odunze ◽  
E. N. O. Iwuafor ◽  
V. O. Chude
Keyword(s):  
Soil Properties ◽  
Northern Guinea Savanna ◽  
Guinea Savanna ◽  
Savanna Zone

scholarly journals Soil Based Heavy Metals Originating from Anthropogenic Activities on Floristic Composition of Some Selected Sites in Kaduna Northern Guinea Savanna of Nigeria

2019 ◽  
pp. 1-10
Author(s):  
A. I. Sodimu ◽  
G. B. Onwumere ◽  
V. M. Yilwa
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Growth Form ◽  
Diversity Index ◽  
Anthropogenic Activities ◽  
Floristic Composition ◽  
Line Transect ◽  
Population Densities ◽  
Northern Guinea Savanna ◽  
Guinea Savanna

Soil based heavy metals originating from anthropogenic activities on floristic composition of some selected sites in Northern Guinea savanna of Nigeria were investigated.   50m x 50m plots were laid in each of the three (3) selected sites with 30m espacement between each plot. This is replicated three (3) times to make a total of nine (9) plots in all.  Soil samples were collected at a depth of 25m with a soil auger and heavy metal analysis was carried out with the use of atomic absorption spectrophotometer. The floristic compositions were evaluated using line transect method. Flora were enumerated in all the sites irrespective of the growth form, (i.e. trees, shrubs and herbs). The data collected were subjected to descriptive statistic, Anova using SPSS while the diversity index was calculated using Shannon Weiner method. The study revealed the presence of six (6) soil based metals in the selected sites, Cd; Cu; Mn; Ni; V and Zn.  Significance differences (P<0.05) exist in soil based heavy metal between sites.  A total of two thousand two hundred and sixty one (2,261) floral species were evaluated. The population densities of the floristic composition are higher in site A than all the other sites while species diversity decrease significantly (P<0.05) from Site A to C.  It is concluded that population densities and diversity of the floristic composition in the selected sites are influenced as a result of soil based heavy metals originating from anthropogenic activities in the sites. It is however recommended that there should be provision of guidelines for the abatement of pollution establishing standard for the control of fuel additives with respect to heavy metals.  Also, there should be prescribed standard for the level of emission from automobile exhaust and energy generating plants and stations.

scholarly journals Modeling Planting-Date Effects on Intermediate-Maturing Maize in Contrasting Environments in the Nigerian Savanna: An Application of DSSAT Model

Agronomy ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 871 ◽  
Author(s):  
Abdullahi I. Tofa ◽  
Uche F. Chiezey ◽  
Bashir A. Babaji ◽  
Alpha Y. Kamara ◽  
Adnan A. Adnan ◽  
...  
Keyword(s):  
Model Evaluation ◽  
Field Experiments ◽  
Growth And Yield ◽  
Northern Guinea Savanna ◽  
Guinea Savanna ◽  
Sowing Dates ◽  
Maize Varieties ◽  
Sudan Savanna ◽  
Savanna Zone ◽  
Good Agreement

The Crop Environment Resource Synthesis (CERES)-Maize model in Decision Support System for Agricultural Technology Transfer (DSSAT) was calibrated and evaluated with experimental data for simulation of response of two intermediate-maturing maize varieties to different sowing dates in the Nigerian savannas. The calibration experiments involved 14 consecutive field trials conducted in the rainy and dry seasons in Bayero University Kano (BUK), Dambatta, and Zaria between 2014–2019. Two sets of field experiments were conducted simultaneously for model evaluation in Iburu in the southern Guinea savanna zone and Zaria in the northern Guinea savanna zone during 2015 and 2016 cropping seasons. The experiments for calibration had two maize (SAMMAZ-15 and SAMMAZ-16) varieties planted under optimum conditions with no water and nutrients stresses. The trials for model evaluation were conducted using the same varieties under four different nitrogen (N) rates (0, 60, 120 and 180 kg N ha−1). A 30-year (1985–2014) term simulation was performed to determine effect of varying sowing dates on yields of two maize varieties (SAMMAZ-15 and SAMMAZ-16) in the Sudan savanna (SS), northern Guinea savanna (NGS), and southern Guinea savanna (SGS) zones. The calibration results showed that the cultivar coefficients of the two maize varieties resulted in simulated growth and development parameters that were in good agreement with observed parameters. Model evaluation showed a good agreement between simulated and observed data for phenology and growth of maize. This demonstrated the potential of the CERES-Maize model to simulate growth and yield of maize in the Nigeria savannas. Results of 30-year sensitivity analysis with 9 different sowing windows showed that in SS, sowing the intermediate maize varieties from early to mid-June produced the highest grain yields. In NGS, the optimum sowing windows were found between late June and late July for the both varieties. In SGS, the optimum sowing window is from early June to late July for SAMMAZ-15 and mid-June to late July for SAMMAZ-16. These planting windows gave the highest long-term average yields for each variety. The variety SAMMAZ-15 was found to be best performing across the three agro-ecologies. Maize performance was generally higher in NGS than in SGS. SS in the Sudan savanna recorded the lowest yield compared with other locations.

Sign in / Sign up

Export Citation Format

Share Document