Tag Archives: Phosphorus

Effect of Siam Weed (Chromolaena Odorata L.) Residues, Phosphorus Fertilizer and Manure Application Time on Soil Properties, Growth and Root Yield of Sweet Potato in Acidic Soil (Published)

Field experiment was conducted at Lower Niger River Basin Development Authority, Ejiba in 2016 and 2017 cropping seasons to investigate the effect of Siam weed (Chromolaena odorata  L.) residues, phosphorus fertilizer and manure application time on soil properties, growth and root yield of sweet potato in acidic soil. Treatments constituted of 4 x 4 factorial arrangements in a Completely Randomized Block Design. Four levels of amendments which were 5t/ha Chromoleana odorata residues, 60 kg/ha phosphorus, 2.5t/ha Chromoleana odorata residues plus 30 kg/ha phosphorus, No Chromoleana odorata residue and no single superphosphate fertilizer (control) and four levels of time of application of the residues which were three (3) weeks before planting (3WBP), manure application at planting (ATP), manure application at three (3) weeks after planting (3WAP) and manure application at six (6) weeks after planting (6WAP). Data on soil pH, growth and yield parameters were collected and subjected to analysis of variance. Significantly different means were separated using Duncan Multiple Range Test at 5% level of probability. The results indicated that soil acidity increased in plots with mineral fertilizer alone in both years. Plot with combined application of Chromolaena odorata residues and phosphorus at reduce rate were better in all the growth and yield characters compared with plots with either Chromolaena odorata residues or phosphorus fertilizer alone. The least values of vine length shoot weight, number of primary branches, and number of tubers per plant, weight of tubers per plant and tuber weight per land area occurred in the control plots. When Chromolaena odorata residues were applied 3 weeks before planting, maximum growth and yield characters were observed. Manure Applied at three (3) weeks before planting gave best growth and yield of sweet potato in this experiment. Application of Chromolaena odorata residues at 2.5 t/ha combined with phosphorus at 30 kg/ha is therefore recommended to the sweet potato farmers for maximum production of sweet potato. Also, Chromolaena odorata residues should be applied into the soil three (3) weeks before planting as it gives maximum values performance parameters.

Keywords: Chromolaena odorata, Phosphorus, Siam weed, manure, potato

Influence of Poultry Manure on Phosphate Fertilizer Need of Soybean (Glycine Max Merill (L) In Some Selected Alfisols in Benue State. (Published)

Laboratory and pot experiments were carried out at the University of Agriculture Makurdi to determine the influence of poultry manure on the Phosphate fertilizer need of soybean in some selected Alfisols in Benue State. Surface soil samples (0 – 20 cm) were collected from three locations in Benue State (Daudu, TseKough and Ayange) and Poultry manure sourced from the University of Agriculture Makurdi Livestock Teaching and Research Farm. The physical and chemical properties of the soils and poultry manure were determined using standard procedures. Four (4) Kg of soils were weighed into perforated plastic pots of 5 litres capacity,Six levels of solution P concentrations (0, 0.150, 0.175, 0.20, 0.225, 0.250 mg l-1), 2 levels of poultry manure (0 and 6 t ha-1) and three soils factorially combined constituted the experimental treatments and were arranged in a Completely Randomized Design (CRD) with three replications. Soybean seeds of the variety TGX 1935-3F were planted and grown to maturity. Optimal P solution concentrations for soybeans production on these soils were 0.2 mg l-1for Daudu, 0.225 mg l-1for TseKough while Ayange required 0.175 mg l-1. The amounts of phosphate fertilizer required to achieve this solution concentrations (SPR) were 204 Kg P ha-1 for Daudu, 223.32 kg P ha-1 and 136.55 Kg P ha-1 for TseKough and Ayange respectively. However with the addition of poultry manure the SPR for Daudu was 165.89 kg P ha-1, 185.04 kg P ha-1 for TseKough and 111.03 kg P ha-1 for Ayange representing 18.75 %, 17.14 % and 18.69 % reduction in SPR respectively.

Keywords: Alfisols, Availability, Phosphorus, Poultry manure, Standard phosphate concentration, Standard phosphate requirement

Influence of Poultry Manure on Phosphate Fertilizer Need of Soybean (Glycine Max Merill (L) In Some Selected Alfisols in Benue State (Published)

Laboratory and pot experiments were carried out at the University of Agriculture Makurdi to determine the influence of poultry manure on the Phosphate fertilizer need of soybean in some selected Alfisols in Benue State. Surface soil samples (0 – 20 cm) were collected from three locations in Benue State (Daudu, TseKough and Ayange) and Poultry manure sourced from the University of Agriculture Makurdi Livestock Teaching and Research Farm. The physical and chemical properties of the soils and poultry manure were determined using standard procedures. Four (4) Kg of soils were weighed into perforated plastic pots of 5 litres capacity,Six levels of solution P concentrations (0, 0.150, 0.175, 0.20, 0.225, 0.250 mg l-1), 2 levels of poultry manure (0 and 6 t ha-1) and three soils factorially combined constituted the experimental treatments and were arranged in a Completely Randomized Design (CRD) with three replications. Soybean seeds of the variety TGX 1935-3F were planted and grown to maturity. Optimal P solution concentrations for soybeans production on these soils were 0.2 mg l-1for Daudu, 0.225 mg l-1for TseKough while Ayange required 0.175 mg l-1. The amounts of phosphate fertilizer required to achieve this solution concentrations (SPR) were 204 Kg P ha-1 for Daudu, 223.32 kg P ha-1 and 136.55 Kg P ha-1 for TseKough and Ayange respectively. However with the addition of poultry manure the SPR for Daudu was 165.89 kg P ha-1, 185.04 kg P ha-1 for TseKough and 111.03 kg P ha-1 for Ayange representing 18.75 %, 17.14 % and 18.69 % reduction in SPR respectively.

Keywords: Alfisols, Availability, Phosphorus, Poultry manure, Standard phosphate concentration, Standard phosphate requirement

Phosphorus Adsorption Isotherms of Some Low Activity Clay Soils As Influenced By Soil Properties and Their Effect on Fertilizer P Recommendations and Yield of Soybean (Glycine Max (L.) Merr.) In Benue State, Nigeria (Published)

The relationship between labile P sorbed to the soil surface and solution P can be described by a quantity-intensity relationship which shows P sorption or desorption as a function of P in the equilibrium solution. Twelve soils in Benue state representing Alfisols, Ultisols and Inceptisols were therefore used to examine the influence of soil properties on the shape and placement of their adsorption curves and yield of soybean. Sorption characteristics were determined in 0.01 M CaCl2 solutions of various P concentrations. For each soil, the amounts of P that gave 0.025, 0.05, 0.075, 0.100, 0.125, 0.150, 0.175, 0.200, 0.225, 0.250 mg kg-1 solution concentrations were estimated from adsorption curves. In the greenhouse, 4 kg of soil from each location was placed in plastic pots. Amount of P estimated from sorption study was added as KH2PO4. The treatments were laid out in Randomized Complete Block Design (RCBD) and soybean seed variety (TGx 1448-2E) was planted and growth and development observed to maturity. Optimum solution P concentration (SPC) was determined for each soil in relation to yield. At harvest, SPC that gave highest grain yield was evaluated for each soil and the quantity of P required (SPR) to achieve this concentration was calculated. Consequently, Odoba would require highest P fertilizer application (604.84 Kg P ha-1), (Tor-Donga 112.31, Abeda-Mbadyul 105.93) would require medium fertilization, (Utonkon 72.75, Katsina-Ala and Ofugo 67.64, Akoodo-Mbakor and Nor 61.26, Ogyoma 39.56, Otobi 33.18 and Abaji-Kpav 22.97 Kg P ha-1)would require low fertilization while Vanam (2.55 Kg P ha-1) would require the least.

Keywords: Adsorption, Fertilizer, Growth, Isotherms, Phosphorus, soils, soybean

EFFECT OF PHOSPHORUS FERTILIZER ON YIELD AND YIELD COMPONENTS OF CHICKPEA/ CICER ARIETINUM) AT KELEMEDA, SOUTH WOLLO, ETHIOPIA (Published)

Filed experiment was carried out to study the effect of varying levels of phosphorus (T1= 0kg/ha, T2= 30kg/ha, T3= 60kg /ha, T4=90kg/ha and T5 =120kg/ha) on growth performance and yield of chickpea (Cicer –arietinum) variety Aratiy at the experimental field of Wollo university, Kelem meda, during winter season in 2013. The results revealed that phosphorus levels significantly affected plant height, number of branches per plant and number of pods per plant. The maximum plant height (39.25cm) was recorded from plots received 60kg P 2O 5 ha -1, while the minimum plant height (32.5cm) was recorded from the control. Similarly higher number of branches per plant was recorded from the same treatment. The maximum number of pods per plant (49) was observed from the application of 60kg P 2O 5 ha -1. Generally the results revealed that the application of 60kg P2O5 ha -1 better performance in all of the parameters studied. However this research was conducted using irrigation, in one location and season. Thus, it should be replicated in multi-location and season so as to assure the results of the experiment

Keywords: : Experiment, Chickpea, Phosphorus, Pods Per Plant