scholarly journals Soil test crop response based phosphorus calibration study for bread wheat in Kofele District, West Arsi Zone Oromia, Ethiopia

2021 ◽  
pp. 20-25
Author(s):  
Abdurahman Husien ◽  
Tilahun Firomsa ◽  
Tilahun Abera
Keyword(s):  
Bread Wheat ◽  
Crop Productivity ◽  
Fertilizer Application ◽  
Yield Response ◽  
Future Research ◽  
Soil Test ◽  
Phosphorus Fertilizer ◽  
Crop Response ◽  
Arsi Zone ◽  
Calibration Study

Nowadays, a balanced fertilizer recommendation is of paramount importance in order to confirm the security and sustainably increase crop productivity for farmers and other stakeholders. Soil test crop response based phosphorus calibration study in two years (2017 and 2018) was done for bread wheat in kofele district with objectives to assess and evaluate yield response of bread wheat to phosphorus-fertilizer applications in soils that have initial high/medium/low levels of phosphorus on Eutric Vertisols. A composite soil samples collection were made in zigzag method from farmer’s land and analyzed for available P in order to identify the level of the required parameters in the soil to select farmland for actual experiment. Accordingly, phosphorus calibration study treatments include application of 0, 10,20,30,40 and 50 kg P ha-1 with recommended nitrogen 69 kg N ha-1 with RCBD design was used with two replications. The plot size of 5mx4m with a seed rate of 150 kg ha-1 and Ogolcho variety which had been recommended for the area was used. So that the result showed that phosphorus fertilizer application significantly affects yield and yield components of bread wheat. Similarly, phosphorous fertilizer application at different rates increased grain yield of bread wheat by 28 to 44% compared to the control. Furthermore, the study was revealed that phosphorus critical (Pc) point for bread wheat was 19, and phosphorus requirement factor was also 3.30. Therefore, future research should focus on verification of the result on farmland before disseminating the technology to the end-user.

scholarly journals Effect of phosphorus and determination of optimum nitrogen for bread wheat in Kofele District, West Arsi Zone of Oromia, Ethiopia

2020 ◽  
pp. 34-37
Author(s):  
Tilahun Firomsa ◽  
Abdurahman Husien ◽  
Kafyalew Assefa ◽  
Tilahun Abera ◽  
Amante Lemma ◽  
...  
Keyword(s):  
Grain Yield ◽  
Bread Wheat ◽  
Nitrogen Fertilizer ◽  
Block Design ◽  
Rate Of Return ◽  
Soil Test ◽  
Crop Response ◽  
Marginal Rate ◽  
Budget Analysis ◽  
Calibration Study

Optimum nutrients are basic for proper and balanced fertilizer recommendations as paramount importance in order to confirm food security and increase crop productivity in a sustainable way for farmers and other stakeholders. Soil test based crop response phosphorus calibration study for bread wheat at kofole district in 2016 with objectives to determine the optimum nitrogen of bread wheat to nitrogen-fertilizer applications in soils and to give quantitative guidelines and recommendations of nitrogen-fertilizer for bread wheat on Eutric Vertisols. The study was conducted on farmers’ fields across the district. The treatments considered for optimum nitrogen determination were four levels of nitrogen (0, 46, 69 & 92) and phosphorus (0, 23, 46 & 92) fertilizer included in the treatments. The treatments were arranged in a factorial combination of complete block design with two replications. The plot size of 5mx4m with a seed rate of 150kg/ha a variety of Ogolcho which had been recommended for the area was used. The analysis of variance showed that there were significant differences (p<0.05) among treatments application for all locations. The highest grain yield was obtained on the application 69N kg/ha with no application of phosphorus fertilizers on Eutric Vertisols. Minimum grain yield was obtained on the control plots at all sites. Optimum determination with the partial budget analysis made using the annual average bread wheat grains prices showed that 69 kg N ha-1 gave a marginal rate of return of 122.41%, which is above the acceptable minimum rate of return. Therefore, future research should focus on soil test crop response based phosphorus calibration study of on the result optimum nitrogen of the farmland could be a pre request of the technology before to the end user.

scholarly journals Phosphorus and Potassium Fertilizer Application Strategies in Corn–Soybean Rotations

Agronomy ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 195 ◽  
Author(s):  
Timothy Boring ◽  
Kurt Thelen ◽  
James Board ◽  
Jason De Bruin ◽  
Chad Lee ◽  
...  
Keyword(s):  
Grain Yield ◽  
Seed Yield ◽  
Soybean Seed ◽  
Fertilizer Application ◽  
High Yield ◽  
Yield Response ◽  
Soil Test ◽  
Soil Test P ◽  
Corn Grain ◽  
Corn Grain Yield

To determine if current university fertilizer rate and timing recommendations pose a limitation to high-yield corn (Zea mays subsp. mays) and soybean (Glycine max) production, this study compared annual Phosphorous (P) and Potassium (K) fertilizer applications to biennial fertilizer applications, applied at 1× and 2× recommended rates in corn–soybean rotations located in Minnesota (MN), Iowa (IA), Michigan (MI), Arkansas (AR), and Louisiana (LA). At locations with either soil test P or K in the sub-optimal range, corn grain yield was significantly increased with fertilizer application at five of sixteen site years, while soybean seed yield was significantly increased with fertilizer application at one of sixteen site years. At locations with both soil test P and K at optimal or greater levels, corn grain yield was significantly increased at three of thirteen site years and soybean seed yield significantly increased at one of fourteen site years when fertilizer was applied. Site soil test values were generally inversely related to the likelihood of a yield response from fertilizer application, which is consistent with yield response frequencies outlined in state fertilizer recommendations. Soybean yields were similar regardless if fertilizer was applied in the year of crop production or before the preceding corn crop. Based on the results of this work across the US and various yield potentials, it was confirmed that the practice of applying P and K fertilizers at recommended rates biennially prior to first year corn production in a corn–soybean rotation does not appear to be a yield limiting factor in modern, high management production systems.

scholarly journals Effect of Soil Test Crop Response based Manure and Fertilizer Application on Potassium Fractions in Soil Inceptisol

2020 ◽  
Vol 9 (8) ◽  
pp. 1971-1978
Author(s):  
V.R. Mageshen ◽  
R. Jayaraghavi ◽  
V.S.V.G. Naresh ◽  
N. Sathiya Bama
Keyword(s):  
Fertilizer Application ◽  
Soil Test ◽  
Crop Response

scholarly journals Yield Response of Cowpea to Phosphorus Fertilizer Application

2020 ◽  
pp. 125-135
Author(s):  
Alhassan Bawa
Keyword(s):  
Grain Yield ◽  
Biomass Production ◽  
Phosphorus Deficiency ◽  
Fertilizer Application ◽  
Yield Response ◽  
Human Consumption ◽  
Production Plant ◽  
Phosphorus Fertilizer ◽  
Dry Biomass ◽  
Cowpea Varieties

Phosphorus fertilizer application plays a major role in nodulation and grain yield production of cowpea. However, phosphorus is a major limiting nutrient in soils in Ghana. Selection of cowpea varieties that produce good biomass and grain yield under low soil phosphorus or those with high phosphorus response efficiency could be a cost-effective approach in solving the phosphorus deficiency problem in Ghana. This study was therefore conducted to determine the appropriate levels of phosphorus fertilizer application for improved nodulation and grain yield of four cowpea varieties. Two-season experiments were conducted to evaluate the influence of phosphorus (P) fertilizer on growth, nodulation, biomass and grain yield in cowpea. Each of the two experiments comprised of 16 treatment combinations of 4 cowpea varieties and 4 levels of P2O5 application laid out in 4×4 factorial experiments in RCBD with three replications. The cowpea varieties were IT × P 148, Valenga, Bengkpla and DPC. The levels of P were 0, 20, 40 and 60 kg P2O5 ha−1. The study revealed that varieties DPC and Valenga performed relatively better with respect to grain yield, shoot and root dry biomass production, nodulation, nodule dry biomass production, plant height, number of branches produced and number of days to 50% flowering across all levels of phosphorus fertilizer application. The study further established that P level of 60 kgha−1 also produced significantly higher quantities of yield and vegetative parameters such as grain yield, 100-grain weight, number of pods and branches, shoot and root dry biomass, nodulation and nodule dry biomass, as compared to P levels of 0 kgha−1, 20 kgha−1 and 40 kgha−1. Phosphorus fertilizer application level of 60 kgha−1 should be used for increased grain and biomass yield. For the purpose of producing grains for human consumption and leguminous fodder crops for feeding livestock, it is recommended that varieties DPC and Valenga should be cultivated for increased yield.

scholarly journals Potassium fertilization: paradox or K management dilemma?

2015 ◽  
Vol 30 (2) ◽  
pp. 115-119 ◽  
Author(s):  
B. Bar-Yosef ◽  
H. Magen ◽  
A.E. Johnston ◽  
E.A. Kirkby
Keyword(s):  
Soil Chemistry ◽  
Detrimental Effect ◽  
Current Knowledge ◽  
Fertilizer Application ◽  
Soil Test ◽  
Review Of The Literature ◽  
Crop Response ◽  
K Fertilizer ◽  
K Fertilization ◽  
Over Time

AbstractIn 2014, Khan et al. presented evidence that soil exchangeable K (Exch-K) increases over time without addition of potassium (K) to the soil despite the removal of K in crops on a soil rich in montmorillonite and illite. The authors term this behavior ‘The potassium paradox’. From their review of the literature, the authors also report a lack of crop response to potassium chloride (KCl) fertilization. Close evaluation of these findings reveals that their observations can be interpreted and predicted using current knowledge of K in soil chemistry and its uptake by plants, and there is no paradox in K behavior in the soil–plant system. There is also no evidence of a detrimental effect of KCl on crop yield or quality. Their conclusion that the widely used Exch-K soil test is inadequate for managing K fertilization is discussed and some possible modifications to improve its performance are included. We believe that measurement of Exch-K is an essential and valuable tool and its use should be continued, along with improvements in recommending K fertilizer application.

Sign in / Sign up

Export Citation Format

Share Document