Understanding the influence of maize (Zea mays) and cowpea (Vigna unguiculata L. Walp) growth period on some thermal and hydrological properties of two soils with textural class variation

Abstract

Adequate knowledge of soil processes is key to ensuring sustainability. Towards a better understanding of some thermal and hydrological processes that take place in the soil as a result of the growth period of maize and cowpea, a concurrent research was carried out in two different locations with soil textural variation (sandy clay loam and clay loam) at the Federal University of Technology, Akure. The treatment consisted of bare soil plot, cowpea plot, and maize plot arranged in a randomized complete block design in three replicates. The same weed management practice was carried out on all treatment plots throughout the duration of the study. Data were collected at 4 weeks after planting (WAP), 8 WAP, and 12 WAP, during which the dry bulk density, mass wetness, volumetric infiltration rate, saturated hydraulic conductivity, sorptivity, soil temperature, total energy emitted, wavelength of maximal radiation intensity, and energy flux were determined. The results showed that growing maize and cowpea had no significant influence (P > 0.05) on the soil properties measured in the SCL soil. However, significant difference was noticed in the CL soil at 8 WAP; the crops grown prevented the formation of excess soil seal and crust when compared to the bare soil plot. This study shows that soil textural property greatly influences hydrological and thermal processes in the soil during the maize and cowpea growth period.

Keywords

• soil processes
• maize growth
• cowpea growth
• soil texture