Articles

Browse our published research articles

409 articles
361
Research Article DOI: 10.67042/njss.2026.9vd0xwaq

The vertical mobility of nitrogen with poultry and sheep manures amendment on degraded Ultisols in Owerri, Southeastern Nigeria

HABEEBAH SAKA*, Bethel Ugochukwu Uzoho, Solomon Oladimeji Olagunju, Musiliat Mopelola Onaolapo

A randomized complete block design experiment was conducted for two years, two locations per year and three months per location with three replications. The rates of dried, milled pure poultry and sheep manures incorporated per location at the onset of the research were 0, 30 and 60 % N. Initial soils and manures were analyzed for macro nutrients. Soil samples collected weekly, bi-weekly and month...

May, 2026 pp. 200 - 218 100 views 59 downloads
362
Research Article DOI: 10.67042/njss.2016.qkjdwev6

Macro and Micro Nutrients Status of Selected Soils Based on Land Use in Southwest, Nigeria

Thomas, E.Y*, Omueti, J.A.I, Akpan, I.O

In Africa, production of food per capita had suffered a decline in the past decade despite the enormous increase in population. To sustain the growing dependence on agricultural production the use of fertilizers became paramount and more fertilizers are now applied than before. Ironically, agricultural production problem persisted. This could be attributed to improper use of fertilizers due to lac...

Aug, 2016 pp. 201-214 192 views 324 downloads
363
Research Article DOI: 10.67042/njss.2014.r5luxpwn

Investigation of Mycorrhizae Populations of Roots and Rhizosphere Soil of Plantain (musa Spp)at the Various Agro-Ecogicalzones in Cross River State

Salimon Bello*, E.O. ATURE

The study was conducted during 2009/2010 dry season at locations (11o 58’ N, 8o 25’E and 110 39’N, 080 027’ E) both located in the Sudan Savanna Ecological Zone of Nigeria. The study was aimed at evaluating the response of cowpea varieties to sowing dates and irrigation intervals. The treatments consisted of three cowpea varieties (IT93K-452-1, Achishru and IT97K-205-8), three sowing dates (Early-...

Apr, 2014 pp. 201-206 151 views 261 downloads
364
Research Article DOI: 10.67042/njss.2013.qt1uzq7m

Effect of Tillage, Poultry Manure and Npk Fertilizer on Soil Chemical Properties and Maize Yield on an Alfisol at Abeokuta, South - Western Nigeria

Busari M. A.*, F. K. Salako

Tillage is a basic soil management tool that significantly affects soil characteristics and plant development. This study examined the 2-year effects of tillage, poultry manure (PM) and NPK 20:10:10 fertilizer on soil chemical properties and maize yield. The experiment was a split-split- plot design with three replications. Tillage (zero tillage (ZT), minimum tillage (MT) and conventional tillage ...

Aug, 2013 pp. 206-218 189 views 255 downloads
365
Research Article DOI: 10.67042/njss.2014.tmsay5u0

Cowpea Yield Response to Sowing Dates and Irrigation Intervals

Samndi Ayuba*, J. O. ICHI, S. MIKO, A. A. ADNAN

Four soil profile pits were dug under differing cropping systems at Nigerian Institute For Oil Palm Research (NIFOR) experimental plantations in Benin City and chemically analysed. Cropping systems were sole oil palm, oil palm with cassava, oil palm with plantain, and oil palm with coconut. Samples were collected at 0 – 20, 20 – 40, 40 – 60, 60 – 80 and 80 – 100cm depth and analyzed for K, P, Ca, ...

Apr, 2014 pp. 207-216 161 views 268 downloads
366
Research Article DOI: 10.67042/njss.2013.yghbeqea

Influence of Plant and Animal Manures on Soil Chemical Properties and Tomato (lycopersicum Esculentum) Yield

Olowokere F. A.*, ADESODUN Johnson Kayode, AKINTOKUN Pius Oluwagbemiga, Egbedokun A.O., Oyenekan, O.A., Martins M.S.

Low nutrient status of tropical soils requires external source of nutrients for sustainable cropping. Field experiments were conducted in 2009 and 2010 cropping seasons at the Federal University of Agriculture, Abeokuta, Nigeria to evaluate the effect of plant and animal manures on soil chemical properties and yield of tomato. Treatments used were: poultry manure (PM), Tithonia diversifolia compos...

Apr, 2013 pp. 207-217 184 views 146 downloads
367
Research Article DOI: 10.67042/njss.2017.qa64xfw3

Slope Position and Depth Effects on Selected Soil Physical Properties Under Oil Palm (elaeis Guineensis) Plantation

O. O. Olubanjo*, MAIDOH F.U., P.O. Oviasogie

A study was conducted to examine the influence of slope position and depth on soil physical properties in an oil palm (Elaeis guineensis) plantation established on a gently sloping terrain in NIFOR Benin, Nigeria. A line transect was delineated along the slope of the selected plantation. The line transect was 45 m long and 45 m wide. It was divided into three equal slope segments namely, Summit, M...

Apr, 2017 pp. 208-215 197 views 290 downloads
368
Research Article DOI: 10.67042/njss.2017.z4l9oct4

Use of Ash for Soil Fertility Improvement Effect on Cowpea

OJENIYI STEPHEN OLUSOLA*, Oyatoye A., Abdulraheem M. I.

Different rates of wood ash at 0 to 6t/ha were applied to cowpea crop in an experiment carried out at Akure, Southwest Nigeria to study effects of ash on cowpea performance soil and plant nutrients composition. The experimental soil is slightly acidic, low in available P and exchangeable Ca. Ash increased soil pH which increased with the rate of ash. Available P, exchangeable Ca, K and Mg were inc...

Apr, 2017 pp. 216-221 184 views 247 downloads
369
Research Article DOI: 10.67042/njss.2014.rgq094ca

Effect of Cropping System on Soil Profile Nutrient Contents

AWANLEMHEN B.E.*, OJENIYI STEPHEN OLUSOLA

Four soil profile pits were dug under differing cropping systems at Nigerian Institute For Oil Palm Research (NIFOR) experimental plantations in Benin City and chemically analysed. Cropping systems were sole oil palm, oil palm with cassava, oil palm with plantain, and oil palm with coconut. Samples were collected at 0 – 20, 20 – 40, 40 – 60, 60 – 80 and 80 – 100cm depth and analyzed for K, P, Ca, ...

Apr, 2014 pp. 217-220 180 views 274 downloads
370
Research Article DOI: 10.67042/njss.2026.hgzeomup

Comparative evaluation of chitosan-based biopolymer and conventional phosphorus extractants on phosphorus availability, soil pH dynamics, and maize agronomic performance in amended soils

Ganiyu Olawale Bankole*, Adeoba Courage Aghorunse, Festus Adelana, Racheal Ayo Buzugbe, Sheriff Adewuyi, Jamiu Oladipupo Azeez

Phosphorus (P) availability in tropical soils is commonly restricted by strong fixation processes, mainly through adsorption onto iron and aluminum oxides and precipitation with calcium compounds, which significantly reduce its mobility and plant utilization. This study evaluated the effectiveness of chitosan-based biosorbents (nZvFe-CLCB) relative to conventional extractants (Bray-1 and Olsen) in...

Jun, 2026 pp. 219 - 238 128 views 54 downloads