Articles

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409 articles
101
Research Article DOI: 10.67042/njss.2026.5ua6ogv0

Soil Physical Properties under Organic and Conventional Farming Systems in a Humid Tropical Environment

Adekunle Temidayo ATTA*, Raymond Alex EKEMUBE

Soil physical degradation remains a major constraint to sustainable agricultural productivity in humid tropical regions, where intensive conventional farming practices often accelerate soil compaction and structural decline. Organic farming has been proposed as an alternative management system capable of improving soil physical quality; however, empirical evidence under tropical field conditions r...

Sep, 2026 pp. 37 - 41 37 views 7 downloads
102
Research Article DOI: 10.67042/njss.2025.g0i27rxw

Comparative effects of organic manure and inorganic fertilizer as nitrogen sources on leaf nutrient content and nitrogen use efficiency of cotton

Omadewu, L.I.*, Kefas, P. K, Ukatu, P O, Abednego, C., Solomon Rejoice Ibrahim

A field experiment was conducted at the Research Farm of the College of Agriculture Jalingo, Taraba State in two planting seasons (2020 and 2021) to determine the influence of nitrogen sources and rates on nutrient concentration in leaf and nitrogen use efficiency of cotton. The experiment was a 5x4 factorial of four nitrogen sources (poultry manure, organo-mineral fertilizer, urea and NPK15:15:15...

Apr, 2025 pp. 37-45 206 views 289 downloads
103
Research Article DOI: 10.67042/njss.2022.f8ss2tqd

Micronutrient Status of Grain Size Fractions in Soils of Land Uses in Mbano, Southeastern, Nigeria

Bethel Ugochukwu Uzoho*, Irokwe I. F.

Micronutrient status in grain size fractions provides information on the active soil fraction and the ability for stabilization against microbial decomposition. Total, available, exchangeable and water-soluble Fe, Zn, Cu and Mn in bulk and grain size soil fractions were evaluated in three land use types (Cassava, Cashew and Oil palm) in Ehime Mbano, Southeastern, Nigeria. Also, using correlation a...

Apr, 2022 pp. 37-44 184 views 287 downloads
104
Research Article DOI: 10.67042/njss.2014.a5x3j2p3

Morphological and Physical Properties of Soils on Basement Complex in Northern Guinea Savanna of Nigeria

Lemuel Musa Maniyunda*, Bashiru Ademola Raji, Odunze Azubuike Chidowe, MALGWI W.B.

Soils developed on four basement complexes, namely Older Granites (OG), Quartzites (QZ), Mica Schists (MS) and Migmatite Gneiss (MG) were studied on crest position in Northern Guinea Savanna of Kaduna State, Nigeria with a view to examine their morphological and physical properties and suggest management options. The results indicated that parent materials significantly influenced soil depth, stru...

Apr, 2014 pp. 37-51 192 views 288 downloads
105
Research Article DOI: 10.67042/njss.2015.xwitvsgo

Heavy Metal Status in Soils and Amaranthus Cruentus from Farmland on the Bank of Orogodo River, Agbor, Delta State, Nigeria.

Orhue E. R.*, Edosa, Ifeyinwa Valerie, Iyagbaye, Louis

This study investigated the status of heavy metals in the soil and Amaranthus cruentus on the farmland at bank of Orogodo River at Agbor, Delta State, Nigeria. Soil and plant samples were collected at an area of 8000 m 2 . The soil samples were collected at a depth of 0-15 cm, 15-30 cm and 30-45 cm while the plant samples were also sampled along with the sampling of the soil in December 2013. Both...

Apr, 2015 pp. 38-44 186 views 278 downloads
106
Research Article DOI: 10.67042/njss.2013.l4e166lx

Field Evaluation of Biowish - Crop Organic Fertilizer in Lowland Rice Production

Bakare S.O*, Alhassan G., Ekaette J.E, Ukwungwu, M.N

A Randomized Complete Block Design experiment with three replicates was carried out at the lowland experimental site of the National Cereals Research Institute, Badeggi in the 2011 and 2012 wet seasons. National Cereals Research Institute, Badeggi is located at Lat. 09o 45’N; Long. 06o 7’E. Three rates of Biowish-Crop (5, 4 and 3kg/ha) were combined with inorganic fertilizer at either recommended,...

Aug, 2013 pp. 38-43 140 views 258 downloads
107
Research Article DOI: 10.67042/njss.2017.xf9qksm0

Status of Available Micronutrients in Soil Profiles of Different Parent Materials in Imo State, Southeastern, Nigeria

Okoli N. H*, Bethel Ugochukwu Uzoho, Onweremadu E. U, AHUKAEMERE C.M., Osisi A. F, Aliba E.O.

The status of available Zn, Cu, Ni and Fe was studied in four representative soil profiles of different parent materials (Coastal Plain Sands, Alluvium, Falsebedded Sandstones and Imo Clay Shale) in Imo State, Southeastern Nigeria. Sample collection was guided by horizon differentiation. Available Zn, Cu, Ni and Fe were evaluated using double acid extraction method. Variation in distribution of av...

Apr, 2017 pp. 40-52 190 views 264 downloads
108
Research Article DOI: 10.67042/njss.2021.uaxvm43v

Effect of Time of Seed - Bed Preparation on Soil Properties and Performance of Water Yam in Owerri Southeast, Nigeria

Ekpe, I I*, Oti, N.N, Ishiusah O. W,, Egboka, N.T, Nwankwo V.C., Iheka, W. C, Aguwa, O U, Amarachi Orji

Field experiment was conducted between the months of February and November, 2016 to evaluate the effect of age of seed-bed preparation on soil properties and performance of water yam in Owerri, southeastern Nigeria. Treatments consisted of four time of seed-bed preparations namely 0, 3, 6, and 9 weeks intervals, laid out in a randomized complete block design (RCBD) with three replications. Se- lec...

Aug, 2021 pp. 41-50 176 views 278 downloads
109
Research Article DOI: 10.67042/njss.2016.jxs961ip

Responses of Maize Growth and Grain Yield to Different Sources and Time of Application of Nitrogen Fertilizer

Omisore J. K.*, Y. A. Abayomi

Soil fertility decline has been identified as one of the major biophysical constraints affecting agriculture in the sub Saharan Africa, including Nigeria. Even though, the use of chemical fertilizer is the most convenient way of improving soil fertility, the high cost and poor distribution of chemical fertilizer have made the commodity inaccessible to resource poor farmers. Consequently, there is ...

Aug, 2016 pp. 41-51 161 views 229 downloads
110
Research Article DOI: 10.67042/njss.2026.vy92h2dj

LAND SUITABILITY ASSESSMENT FOR RAINFED CASSAVA (Manihot esculenta Crantz) PRODUCTION IN FARM SETTLEMENT (PAPA ABEDE), OGBOMOSO, OYO STATE, NIGERIA

Olatomiwa Akinola*

Reliable land suitability information strengthens site-specific management decisions for cassava (Manihot spp.), a crop of major economic and food-security importance in Nigeria, yet such site-level assessment has received little attention in the derived savanna zone around Ogbomoso. This study assessed the suitability of soils for rainfed cassava production in twelve soil observation points at Fa...

Sep, 2026 pp. 42 - 50 37 views 7 downloads