Climate variability has been and continues to be, the principal source of fluctuations in global food production in countries of the developing world and is of serious concern. Process-based models use simplified functions to express the interactions between crop growth and the major environmental factors that affect crops (i.e., climate, soils and management) and many…
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Simulated studies indicated that early sowing i.e 15th April (D1) predicted highest grain yield during all the years from 1986-2013. Under irrigated conditions increasing levels of N predicted increased grain and stover yield from N levels up to 90 kg N ha-1. Under irrigated and mulched conditions increased level of N predicted increase in maize…
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Land is a natural resource which is a scare commodity. It is therefore important to classify land and Land Use. The city of Port Harcourt has experienced a lot of changes on Land Uses and Land Cover which has had an impact on the spatial pattern of the city. This study hopes to identify how…
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The Orizaba Valley is a Mexican region, located at the geographic center of Veracruz State, having Orizaba City as the main demographic population surrounded by other municipalities, becoming the fourth metropolitan populated area of Veracruz State. This region has the third position on economic, historic and cultural relevance at Veracruz State, just after the Veracruz…
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Vertisols are one of the most fertile soils in the World but crop production is often limited by physical features related to shrink-swell movements under different moisture conditions making management strategies mostly tilted towards soil moisture control. However, most crops grown on Vertisols often show signs of nutritional deficiencies whose causes are not yet fully…
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The Cross River gorilla, one of the most endangered subspecies of western gorilla (Gorilla gorilla) is endemic to 12 to 14 sites at the Cameroon-Nigeria border, where it is facing enormous threats from habitat loss, bush meat trade and minor climate changes (seasonal changes). In a strive to reduce the enormous stressors on this subspecies,…
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Removal rate of Total Petroleum Hydrocarbon Content (TPHC) of a crude oil polluted land was investigated with field experimental data generated from the Research Farm soil at the Federal University of Technology Owerri, Imo State, Nigeria. The artificially polluted soil using crude oil – bonny light – with specific gravity of 0.8323 was analyzed. The…
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A geoelectrical investigation for potable groundwater potentials in Dorowa and its environs, Plateau State, North Central Nigeria has been carried out. The area is part of Jos-Bukuru Younger Granite Complex and is underlain by seven main rock types namely: Vom Microgranite (Vm), Rayfield Gona Biotite Granite (RGB), Ngell Biotite Granite (NGB), Vom Hornblende Biotite Granite…
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Processes that occur inside polar snow cover significantly affect polar atmosphere but they are still poorly understood. Most studies consider photochemistry as the dominant mechanism of chemical transformations but recent field data cannot be interpreted only by such photochemical model. A concept is proposed to consider electric phenomena that are well known to physics but…
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