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E. A. Akpa

Publications (5)

Evaluation of Saturated Hydraulic Characteristics and its Influence on Some Physical and Chemical Properties of Soils Developed on Coastal Plain Sands of Obufa Esuk Orok in Calabar, Cross River State, Nigeria

E. A. Akpa, A. I. Akpama & O. Oyedele · Asian Research Journal of Agriculture · 2021

The study highlights the evaluation of saturated hydraulic characteristics and its influence on some physical and chemical properties of soils developed on coastal plain sands of Obufa Esuk Orok in Calabar, Cross River State, Nigeria. Sixteen grids designed in an experimental plo...

Open access Research Article 10.9734/arja/2020/v13i430111

The Effect of Solid (Granular) and Liquid (Foliar) Fertilizers Application on the Growth and Yield of Maize (Zea mays L) in Soils of Obubra, Cross River State, Nigeria

E. A. Akpa & L. J. Agah · Asian Journal of Soil Science and Plant Nutrition · 2019

The research was carried out in the month of April, 2018 to determine the effect of solid (granular) and liquid (foliar) fertilizers application on the growth and yield of maize in soils of Obubra. Five (5) composite soil samples were collected at the depth of 0-20 cm for the ana...

Open access Research Article 10.9734/ajsspn/2019/v4i430053

Evaluation of Infiltration Characteristics of Soils Developed on Coastal Plain Sands in Calabar Municipality Local Government Area, Cross River State, Nigeria

O. Oyedele, E. A. Akpa & J. F. Akpan · Asian Journal of Advances in Agricultural Research · 2019

Infiltration of water into the soil is an important physical process affecting the fate of water under field conditions, especially the amount of subsurface recharge and surface runoff and hence the hazard of soil erosion. The study was conducted to evaluate the infiltration mode...

Open access Research Article 10.9734/ajaar/2019/v10i430036

Distribution of Primary Nutrients (NPK) to Crop Production in Profiles of Soils Derived from Coastal Plain Sand in Ikot Ekpo, Calabar, Cross River State, Nigeria

M. O. Eyong & E. A. Akpa · International Journal of Plant & Soil Science · 2019

This study was conducted to evaluate the distribution of primary nutrients (NPK) in profiles of the coastal plain soils of Ikot Ekpo, Calabar, as well as evaluate other soil properties critical to agricultural productivity, in a bid to generate data that will serve as a guide to...

Open access Research Article 10.9734/ijpss/2019/v28i530123

Response of Okra to Incorporating Humic Acid-Derived Active Molecules into NPK Fertilizer and Lime on Coastal Plain Sand in Calabar, Nigeria

S. M. Afu & E. A. Akpa · International Journal of Plant & Soil Science · 2019

This study evaluated the response of okra to NPK fertilizer with humic acid and lime at the University of Calabar, Teaching and Research Farm between October 2015 and January 2016 cropping season. The experiment was laid out in a randomized complete block design (RCBD) with four...

Open access Research Article 10.9734/ijpss/2019/v27i330079