Residual Effect of Lime Rate after Five Years and P Fertilizer Rates on Bread Wheat (Triticum Aestivum L.) Yield on Acidic Soil in Banja District, North Western Ethiopia (Published)
Soil acidity problem is one of the bottlenecks to improve crop production in high rainfall regions of Ethiopia in general and in Banja district particular. This study aimed to determine the residual effect of lime and P fertilizer on the acid properties of soils and to develop models whereby the change in acidity indicators of soils can be predicted as a result of lime application. The experiment was laid out in a randomized complete block design with three replications. Five levels of lime (0, 1.15, 2.3, 3.45, 4.6 t ha-1) and four levels of Phosphorous (0, 10, 20, and 30 kg ha-1) were combined in a complete factorial arrangement. The study was conducted for three consecutive years from 2015 to 2017 main cropping seasons at Banja district. Mean grain yield and yield components as affected by different levels of lime and phosphorus fertilizer. Analysis of variance showed that all limed treatments were higher mean values of grain yield and yield components relative to control plot (no lime and P) in all over combined cropping years. Moreover, over year combined mean the highest grain yields (1115.9 kg ha-1), biomass yields (3591.2 kg ha-1), number of seeds per plant (21.54), plant height (64.50 cm) and spike length (5.24 cm) were recorded under 4.6 t ha-1 of lime application of plot. The lowest grain and biomass yields were recorded in control plots. However, over year mean 4.6 t ha-1 of lime application plot the grain yield and biomass yield of wheat were increased by (151.1%) and (123.3%) related to the control plot, respectively. Hence, lime application at the rate of 3.45 t ha-1 (150% of the lime requirement of the soils based on its exchangeable acidity) coupled with 20 kg ha-1 P fertilizer could serve as a reference to boosting wheat production in the study area and similar areas with possible re-liming of the soils in every five years.
Citation: Mesfin Kuma, Getachew Yilma and Musefa Redi (2022) Residual Effect of Lime Rate after Five Years and P Fertilizer Rates on Bread Wheat (Triticum Aestivum L.) Yield on Acidic Soil in Banja District, North Western Ethiopia, Global Journal of Agricultural Research , Vol.10, No.3, pp.13-23
Keywords: Acidic soil, Phosphorus, lime
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