Langmuir and Freundlich Isotherm Models’ Description of P. Adsorption Capacity of Wetland and Upland Soil in Rivers State (Published)
Soil samples from pedons of selected wetland and upland soils of Rivers State Nigeria were collected to investigate the appropriate P-Adsorption models, under different parameters namely, soil physicochemical properties and Phosphorus Sorption Isotherm models. The phosphorus sorption data were obtained by equilibrating 3g of soil samples in 30ml, 0.01M CaCl2 containing various amount of KH2P04 (0, 5, 10, 15, 20 and 25ppm). Linear and Non-linear regression methods were used to determine the best fit of equilibrium data. The two-parameter models: Freundlich and Langmuir were employed for fitting the equilibrium data. The study revealed that both Langmuir and Freundlich Isotherm were suitable to describe adsorption of Phosphorus for the six pedons. However, Freudlich Isotherm model explained P-adsorption better than Langmuir Isotherm model. The highest phosphorus sorption capacity of 333.33mg/kg was found in Obor 1, Obor 2 and RSU followed by Isu (0.00mg/kg), Eagle-Island (-333.33mg/kg) and Ozuzu (-125mg/kg). The value of the separation factor of the Langmuir Isotherm RL lying in between O and < 1 for Obor1, Obor 2 and RSU indicating that isotherm processes are favourable and < 0 which indicate desorption for Eagle Island and Ozuzu. While 1 suggesting Linear adsorption for Isu. Similarly, the Freundlich Isotherm intensity parameter 1/n fell in between O and < 1, and > 1 indicating favourable for Obor1, Obor 2, RSU, Isu and Unfavourable for Eagle–Island and Ozuzu respectively. The optimum time for phosphate adsorption onto soil was found to be 120 minutes for Obor 1, Obor 2, RSU, Ozuzu, Isu and Eagle Island for both models. The amount P-sorbed increased with increase in time.
Keywords: Adsorption, Freundlich, Isotherm, Langmuir, Models, Soil, Upland, Wetland, phosphate
Effect of Adding Different Organic Fertilizers in the Absorption of Some of Nutrient Elements from Soil in Properties of Plant Growth and Yield of Cucumber Plant (Published)
The experiment was conducted in one of the greenhouses of the College of Agriculture – University of Wasit for spring season 2013 to study the effect of adding some organic fertilizers in the growth of cucumber plant . The experiment included 6 Treatments : (T1 comparative treatment ( without any addition ), T2 adding ground for Fertilizer organic Humic plus by 250 g / Dunam , T3 addingthe organic nutrient Vegeamino Foliar with concentration of 1 ml / l , T4 adding compost Humic plus Foliar concentration of 3 g / l , T5 adding organic fertilizer Humic plus Foliar + Vegeamino and T6 adding organic fertilizer Humic plus ground addion + Vegeamino) . The experiment was carried out using a Randomized Complete Block Design (RCBD) with three replications and tested moral differences between averages , according to the less significant moral differences between averages and the probability of 0.05.The results showed a significant superiority of treatment T6 ( Adding Organic Fertilizer Humic plus Add ground + Vegeamino Foliar) in the dry weight of the plant and the percentage of chlorophyll , nitrogen ,and potassium , and holds rate per plant , and the sum total of the plastic house as it was ( 23.99 g , 52.40 % , 4.50% , 2.970 % , 0.641 kg 0.721 kg) , respectively, with no significant difference for treatment T2 in the percentage of chlorophyll , nitrogen , potassium and rate yield per plant sum total of the plastic house which recorded ( 51.19 % , 4.48 % , 2.960 % , 0.585 kg 0.681 kg). From this study , we are conclude that using Organic Fertilizer Humic plus as ground applied + Vegeamino as foliar applied can be enhance from cucumber growth and increase the yield it .
Keywords: Nutrient Elements, Organic Fertilizers, Plant Growth Cucumber Plant, Soil
Quantifying the Productivity of Spent Oil Contaminated Soil Amended With Organic Wastes Using Productivity Index in Abakaliki, South Eastern Nigeria (Published)
A study on quantifying the productivity of spent oil contaminated soil amended with organic wastes using productivity index (PI) was carried out at the Teaching and Research Farm of the Faculty of Agriculture and Natural Resources Management, Ebonyi State University, Abakaliki. The study involved a modification of Pierce et al. productivity index model with simultaneous exclusion of sufficiencies for aeration and electrical conductivity. The applicability and validity of the modified Pierce et al. productivity index model were determined using maize as a test crop. Result showed highly significant (r=0.96 at P<0.01) relationship between PI and grain yield of maize. The general mean PI and grain yield of maize were 0.32 and 0.94 tha-1for the treatments. The mean productivity indices with grain yield of maize were 0.20 and 0.50tha-1, 0.40 and 1.2otha-1, 0.26 and 0.80 tha-1 and 0.42 and 1.3tha-1 for control, burnt rice husk dust, unburnt rice husk dust and saw dust amended soils, respectively. The burnt rice husk dust which had highest prediction of 0.58 also predicted highest grain yield of maize of 2.2tha-1. The grain yield of maize followed productivity index predictions. Organic wastes could be recommended for attenuating problem of spent oil contamination of soil in Abakaliki.
Keywords: Amended, Contamination, Organic wastes, Productivity, Quantifying, Soil, Spent oil.