Response of field peas to phosphate fertilization

2003 ◽  
Vol 83 (2) ◽  
pp. 283-289 ◽  
Author(s):  
R. E. Karamanos ◽  
N. A. Flore ◽  
J. T. Harapiak
Keyword(s):  
Uniform Design ◽  
Monoammonium Phosphate ◽  
Canadian Prairie ◽  
Yield Increase ◽  
Seed Moisture ◽  
Field Peas ◽  
Triple Super Phosphate ◽  
Seed Placement ◽  
P Application ◽  
The Impact

Canadian Prairie Provinces in general, and Saskatchewan in particular are major producers of peas worldwide. Individual provincial criteria for P application are considerably different from each other. Further introduction of new pea varieties and the adoption of direct seeding practices prompted us to re-evaluate these criteria. To this end, two experiments with field peas (Pisum sativum L. var. Carneval) were carried out between 1994 and 1998 at nine different locations in Alberta. The first experiment was carried out in 1994 and consisted of three trials with six rates of P (0, 4.4, 8.7, 13, 17.5 and 21.8 kg P ha-1) in the form of monoammonium phosphate (MAP) (12-51-0). To eliminate the impact of varying N rates along with P, a series of 21 trials and a uniform design that included five rates of P (0, 6.5, 13, 19.5 and 26 kg ha-1) in the form of triple super phosphate (0-45-0) and two methods of placement (seed placement or side banding) were subsequently carried out. There was a significant response to P application at all 13 sites of both experiments that contained 10 or less mg of a Modified Kelowna (MK) extractable-P kg-1 of soil. Side banding resulted in significantly higher yield in only three trials. Maximum average yield increase of 645 kg seed ha-1 was obtained with application of 19.5 kg P ha-1; it was influenced by soil texture as the magnitude of response was greater on loamy (535 kg seed ha-1) than on clay loam soils (285 kg seed ha-1). There was no significant yield increase in the trials that contained greater than 10 mg MK-P kg-1 soil. Reduction in plant population was more frequent as a result of seed placement (nine cases with P < 0.1) than side banding in both experiments. The impact of P fertilization on seed moisture was not consistent. The ability to side band or to seed with an increased seed bed utilization may fulfil the need for application of greater rates of P than the ones currently recommended for prairie soils. Key words: Seed placement, side banding, triple super phosphate, monoammonium phosphate

scholarly journals Crushing Susceptibility of Vetch Seeds Under Impact Loading

2017 ◽  
Vol 50 (4) ◽  
pp. 5-16
Author(s):  
F. Shahbazi
Keyword(s):  
Moisture Content ◽  
Impact Energy ◽  
Impact Loading ◽  
Impact Damage ◽  
Mechanical Damage ◽  
Seed Moisture Content ◽  
Mean Values ◽  
Seed Moisture ◽  
Mathematical Relationships ◽  
The Impact

AbstractMechanical damage of seeds due to harvest, handling and other process is an important factor that affects the quality and quaintly of seeds. The objective of this research was to determine the effects of moisture content and the impact energy on the breakage susceptibility of vetch seeds. The experiments were conducted at moisture contents of 7.57 to 25% (wet basis) and at the impact energies of 0.1, 0.2 and 0.3 J, using an impact damage assessment device. The results showed that impact energy, moisture content, and the interaction effects of these two variables significantly influenced the percentage breakage in vetch seeds (p<0.01). Increasing the impact energy from 0.1 to 0.3 J caused a significant increase in the mean values of seeds breakage from 41.69 to 78.67%. It was found that the relation between vetch seeds moisture content and seeds breakage was non-linear, and the extent of damaged seeds decreased significantlyas a polynomial (from 92.47 to 33.56%) with increasing moisture (from 7.57 to 17.5%) and reached a minimum at moisture level of about 17.5%. Further increase in seed moisture, however, caused an increase in the amount of seeds breakage. Mathematical relationships composed of seed moisture content and impact energy, were developed for accurately description the percentage breakage of vetch seeds under impact loading. It was found that the models have provided satisfactory results over the whole set of values for the dependent variable.

scholarly journals The Impact of an Experimental Guaranteed Income on Crime and Violence

2020 ◽  
Author(s):  
David Calnitsky ◽  
Pilar Gonalons-Pons
Keyword(s):  
Partner Violence ◽  
Demographic Data ◽  
Negative Relationship ◽  
Property Crime ◽  
Annual Income ◽  
Social Experiment ◽  
Canadian Prairie ◽  
Significant Negative Relationship ◽  
Main Components ◽  
The Impact

Abstract Would unconditional cash payments reduce crime and violence? This paper examines data on crime and violence in the context of an understudied social experiment from the late 1970s called the Manitoba Basic Annual Income Experiment, or Mincome. We combine town-level crime statistics for all medium-sized Canadian Prairie towns with town-level socio-demographic data from the census to study how an experimental guaranteed income affected both violent crime and total crime. We find a significant negative relationship between Mincome and both outcomes. We also decompose total crime and analyze its main components, property crime and “other” crime, and find a significant negative relationship between Mincome and property crime. While the impact on property crime is theoretically straightforward, we close by speculating on the mechanisms that might link the availability of guaranteed annual income payments to a decline in violence, focusing on the mechanisms that shape patterns of inter-partner violence.

scholarly journals Improving Phosphorus Use Efficiency and Optimizing Phosphorus Application Rates for Maize in the Northeast Plain of China for Sustainable Agriculture

2019 ◽  
Vol 11 (17) ◽  
pp. 4799
Author(s):  
Wenting Jiang ◽  
Xiaohu Liu ◽  
Xiukang Wang ◽  
Lihui Yang ◽  
Yuan Yin
Keyword(s):  
Grain Yield ◽  
Maximum Yield ◽  
Application Rate ◽  
P Uptake ◽  
Plant P Uptake ◽  
P Fertilizer ◽  
P Rate ◽  
P Application ◽  
Phosphorus Application ◽  
The Impact

Optimizing the phosphorus (P) application rate can increase grain yield while reducing both cost and environmental impact. However, optimal P rates vary substantially when different targets such as maximum yield or maximum economic benefit are considered. The present study used field experiment conducted at 36 experiments sites for maize to determine the impact of P application levels on grain yield, plant P uptake, and P agronomy efficiency (AEP), P-derived yield benefits and private profitability, and to evaluated the agronomically (AOPR), privately (POPR), and economically (EOPR) optimal P rate at a regional scale. Four treatments were compared: No P fertilizer (P0); P rate of 45–60 kg ha−1 (LP); P rate of 90–120 kg ha−1 (MP); P rate of 135–180 kg ha−1 (HP). P application more effectively increased grain yield, reaching a peak at MP treatment. The plant P uptake in HP treatment was 37.4% higher than that in P0. The relationship between P uptake by plants (y) and P application rate (x) can be described by the equation y = −0.0003x2 + 0.1266x + 31.1 (R2 = 0.309, p < 0.01). Furthermore, grain yield (y) and plant P uptake (x) across all treatments also showed a significant polynomial function (R2 = 0.787–0.846). The MP treatment led to highest improvements in P agronomic efficiency (AEP), P-derived yield benefits (BY) and private profitability (BP) compared with those in other treatments. In addition, the average agronomically (AOPR), privately (POPR), and economically optimal P rate (EOPR) in 36 experimental sites were suggested as 127.9 kg ha−1, 110.8 kg ha−1, and 114.4 kg ha−1, which ranged from 80.6 to 211.3 kg ha−1, 78.2 to 181.8 kg ha−1, and 82.6 to 151.6 kg ha−1, respectively. Economically optimal P application (EOPR) can be recommended, because EOPR significantly reduced P application compared with AOPR, and average economically optimal yield was slightly higher compared with the average yield in the MP treatment. This study was conducive in providing a more productive, use-effective, profitable, environment-friendly P fertilizer management strategy for supporting maximized production potential and environment sustainable development.

Productivity of crops grown on raised beds on duplex soils prone to waterlogging in Western Australia

2007 ◽  
Vol 47 (11) ◽  
pp. 1368 ◽  
Author(s):  
D. M. Bakker ◽  
G. J. Hamilton ◽  
D. J. Houlbrooke ◽  
C. Spann ◽  
A. Van Burgel
Keyword(s):  
Grain Yield ◽  
Western Australia ◽  
Arable Land ◽  
Experimental Period ◽  
Grain Yields ◽  
Yield Increase ◽  
Field Peas ◽  
Yield Difference ◽  
Raised Bed ◽  
Flat Ground

Waterlogging of duplex soils in Western Australia has long been recognised as a major constraint to the production of agricultural crops and pastures. The work described in this paper examines the application of raised beds to arable land that is frequently waterlogged for the production of crops such as wheat, barley, field peas, lupins and canola. Raised beds are 138 cm wide, seed beds separated by 45 cm wide furrows 183 cm apart. These beds were made with a commercial bed former. Seven sites were selected across the south-eastern wheat belt of Western Australia with the experimental areas varying in size from 10 to 57 ha. These large sites were used to accommodate commercial farm machinery. Each site had raised beds formed with a commercial bedformer. The production from the bedded areas was compared with crops grown conventionally on flat ground under minimum tillage as the control. The experiments were established in 1997 and 1998 and the sites were monitored for a maximum of 5 years. In 11 of the 28 site-years of the experiments, grain yields on the raised beds were statistically significantly higher than the yield from crops grown on the control, with an average yield increase of 0.48 t/ha. Across the whole dataset, growing crops on raised beds did not produce significantly lower yields. Below average rainfall was received for much of the experimental period at several sites. Growing season rainfall had a large effect on grain yield and high rainfall over a period of 40 days after seeding significantly increased the grain yield difference between the raised bed and the control. These data indicate that the use of raised beds lead to higher grain yields when seasonal conditions are appropriate.

Effect of field peas and wheat on the yield and protein content of subsequent wheat crops grown at several rates of applied nitrogen

1994 ◽  
Vol 34 (5) ◽  
pp. 641 ◽  
Author(s):  
IC Rowland ◽  
MG Mason ◽  
IA Pritchard ◽  
RJ French
Keyword(s):  
N Availability ◽  
Average Increase ◽  
Average Yield ◽  
Response Curves ◽  
Yield Data ◽  
Yield Increase ◽  
Field Peas ◽  
Quadratic Response ◽  
The Difference ◽  
Rate Interaction

The responses of wheat to various rates of N fertiliser were compared following field peas (PW) or wheat (WW) in the previous year. Seventeen trials were carried out at 5 sites between 1986 and 1991. The trials were on medium- and fine-textured soils (clay loams or shallow duplex soils). The overall grain yield of PW appeared greater than WW in 11 trials [was significantly greater in 9 (P<0.05)], and did not appear different in 6 trials. When no N was applied the yield advantage of PW was 41% (PW 1.91 t/ha cf. WW 1.37 t/ha). Quadratic response curves were fitted to all yield data. Rotation x N rate interaction was significant (P<0.05) in 10 comparisons. In 5 trials, while there was a yield increase to N fertiliser with WW, the yields decreased with PW. In 3 trials while there was an increase with WW there was no response with PW or a reduction at higher rates of N. In the remaining 2 trials there were responses with both PW and WW, but this was greater for WW. The response curves in these 10 trials either converged and met, indicating that the difference between rotations was due to N availability, or converged but did not meet, indicating that N was important but did not explain the whole difference. Where there was no interaction between rotation and N rate the response curves were parallel. The type of response could not be predicted. It was not profitable to apply N fertiliser to wheat in the PW rotation in 11 of the 17 trials. The average yield advantage of PW over WW, in the absence of N was 540 kg/ha, while there was an average increase of 1.7% grain protein.

scholarly journals Effects of Temperature and Grafting on Yield, Nutrient Uptake, and Water Use Efficiency of a Hydroponic Sweet Pepper Crop

Agronomy ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 110 ◽  
Author(s):  
Andreas Ropokis ◽  
Georgia Ntatsi ◽  
Constantinos Kittas ◽  
Nikolaos Katsoulas ◽  
Dimitrios Savvas
Keyword(s):  
Water Use Efficiency ◽  
Nutrient Uptake ◽  
Water Use ◽  
Total Yield ◽  
Sweet Pepper ◽  
Winter Climate ◽  
Mild Winter ◽  
Yield Increase ◽  
Use Efficiency ◽  
The Impact

In areas characterized by mild winter climate, pepper is frequently cultivated in unheated greenhouses in which the temperature during the winter may drop to suboptimal levels. Under low temperature (LT) conditions, the uptake of nutrients may be altered in a different manner than that of the water and thus their uptake ratio, known as uptake concentration, may be different than in greenhouses with standard temperature (ST) conditions. In the present study, pepper plants of the cultivars “Sammy” and “Orangery”, self-grafted or grafted onto two commercial rootstocks (“Robusto” and “Terrano”), were cultivated in a greenhouse under either ST or LT temperature conditions. The aim of the study was to test the impact of grafting and greenhouse temperature on total yield, water use efficiency, and nutrient uptake. The LT regime reduced the yield by about 50% in “Sammy” and 33% in “Orangery”, irrespective of the grafting combination. Grafting of “Sammy” onto both “Robusto” and “Terrano” increased the total fruit yield by 39% and 34% compared with the self-grafted control, while grafting of “Orangery” increased the yield only when the rootstock was “Terrano”. The yield increase resulted exclusively from enhancement of the fruit number per plant. Both the water consumption and the water use efficiency were negatively affected by the LT regime, however the temperature effect interacted with the rootstock/scion combination. The LT increased the uptake concentrations (UC) of K, Ca, Mg, N, and Mn, while it decreased strongly that of P and slightly the UC of Fe and Zn. The UC of K and Mg were influenced by the rootstock/scion combination, however this effect interacted with the temperature regime. In contrast, the Ca, N, and P concentrations were not influenced by the grafting combination. The results of the present study show that the impact of grafting on yield and nutrient uptake in pepper depend not merely on the rootstock genotype, however on the rootstock/scion combination.

Potential for semiochemical-based monitoring of the pea leaf weevil (Coleoptera: Curculionidae) on field pea (Fabaceae) in the Canadian Prairie Provinces

2016 ◽  
Vol 148 (5) ◽  
pp. 595-602 ◽  
Author(s):  
M.L. Evenden ◽  
C.M. Whitehouse ◽  
A. St. Onge ◽  
L. Vanderark ◽  
J.-P. Lafontaine ◽  
...  
Keyword(s):  
Aggregation Pheromone ◽  
Pitfall Traps ◽  
Canadian Prairie ◽  
Baited Traps ◽  
Field Peas ◽  
Important Pest ◽  
Faba Beans ◽  
Perennial Legumes ◽  
Pea Leaf Weevil ◽  
Prairie Provinces

AbstractThe pea leaf weevil, Sitona lineatus (Linnaeus) (Coleoptera: Curculionidae), is an important pest of field peas, Pisum sativum Linnaeus (Fabaceae), and faba beans, Vicia faba Linnaeus (Fabaceae), that has recently become established in the Prairie Provinces of Canada. Male pea leaf weevils produce an aggregation pheromone, 4-methyl-3,5-heptanedione, in the spring when overwintered weevils migrate to fields to feed and mate. The current study tests the attractiveness of the aggregation pheromone with and without synthetic bean volatiles to pea leaf weevils in the spring and in the fall when weevils seek perennial legumes to feed and overwinter. Modified Leggett traps similar to those used in Europe did not retain weevils in this study. Aggregation pheromone-baited pitfall traps caught male and female weevils in the spring and fall. Weevils were not attracted to traps baited with three bean volatiles, (Z)-3-hexen-1-yl acetate, (Z)-3-hexen-1-ol, and linalool. Bean volatiles did enhance response to pheromone, but only in the fall. Weevils were captured in most semiochemical-baited traps in a 1:1 sex ratio, but female-biased catch in control traps might indicate greater activity of females in the trap vicinity. This study lays the groundwork for semiochemical-based monitoring to detect pea leaf weevil spread in the Prairie Provinces.

scholarly journals Bio-rational Management of Pod Borer (Helicoverpa armigera L.) in Chickpea Crop

2021 ◽  
Author(s):  
B.L. Jat ◽  
Nidhi . ◽  
Gopichand Singh ◽  
Pushpa Kumawat
Keyword(s):  
Helicoverpa Armigera ◽  
Pheromone Trap ◽  
Cost Ratio ◽  
Yield Increase ◽  
Benefit Cost Ratio ◽  
Pod Borer ◽  
Helicoverpa Armígera ◽  
Rational Management ◽  
Benefit Cost ◽  
The Impact

On Farm Testing of Pheromone trap @ 5/ha + Coriander row (7/8:1) + HaNPV @ 250 LE/ha against pod borer (Helicoverpa armigera L.) management was assessed on farmers field in Nagaur district during 2020-21. Trial was conducted on 10 farmer’s field to know the impact of said technology on chickpea pod borer management. In the demonstrated technologies the chickpea seed production 19.83 q/ha. The percent seed yield increase over the farmer’s practices was 34.11%. The net return in demonstration technology was ` 67036/ha and the same was ` 44525/ha. The incremental benefit cost ratio was 3.26 in demonstration technology as compared to farmer’s/ local check 2.60 respectively.

scholarly journals Evaluating the Impact of Rural Finance on Cocoa Farmers Productivity: A Case Study of Bodi District in Ghana

2020 ◽  
pp. 36-45
Author(s):  
Sonny Gad Attipoe ◽  
Cao Jianmin ◽  
Yaa Opoku-Kwanowaa
Keyword(s):  
Raw Materials ◽  
Community Banks ◽  
Cross Sectional ◽  
Agricultural Finance ◽  
Logistic Regression Models ◽  
Access To Credit ◽  
Yield Increase ◽  
Cocoa Farmers ◽  
The Impact ◽  
Cocoa Yield

Background: Agricultural finance from rural and community banks play a major role in increasing both yield and income of rural farmers in agricultural-dependent economies. These finances are needed for purchasing raw materials, paying labor fees and buying farming equipment, etc. However, substantial evidence about their roles in improving farm productivity is lacking, especially in the cocoa sector in Ghana, where rural and community banks are the forerunners in advancing credit to cocoa farmers in Ghana’s deprived rural cocoa-growing communities. This research, therefore, seeks to determine the impact of rural and community banks’ credit on cocoa farmers' productivity in the Bodi District of Ghana. Methodology: Using random sampling method, a cross-sectional data of 350 cocoa farmers from 5 operational areas (Afere, Bodi, Amoaya, Kama and Suino) located in Bodi District in the Western region. The data were analyzed using descriptive statistics and logistic regression models. Statistical software (SPSS v20 and STATA v14) were used to analyze quantitative data on cocoa productivity. Results: The results revealed that cocoa farmers with access to credit experienced significant yield increase (p<0.05) with a mean of 359.71 kgha-1 as compared to 235.30 kgha-1 for non-credit takers. Further, only 34.3% of farmers accessed credit for farming. With Pseudo R2 value of 0.78, farm tenure system, fertilizer use, access to credit and access to extension services significantly influenced cocoa yield, while the age of cocoa farmer, age of farm trees and vulnerability of farm to natural disaster negatively affected cocoa yield. Tukey HSD results (p<0.00) indicate that rural banks credit allocations to non-agricultural activities such as trade and transport, and social loans had the highest percentage means which suggests that agriculture is treated less favorable in rural banks' credit portfolio. These findings give credence to the assertion that rural banks are deviating from their core mandate of supporting agriculture in Ghana. Conclusion: This study reaffirms the supporting roles played by rural and community banks in increasing cocoa yield in Ghana. However, this research recommends that, the Bank of Ghana should closely monitor the activities of these unit banks to reduce the instances of diverting all their funds to non-agricultural related activities.

scholarly journals Is Diminishing Solar Activity Detrimental to Canadian Prairie Agriculture?

2020 ◽  
Vol 3 (3) ◽  
Keyword(s):  
Solar Activity ◽  
Large Scale ◽  
Time Frame ◽  
Precipitation Pattern ◽  
Canadian Prairie ◽  
Canadian Prairies ◽  
Temperature And Precipitation ◽  
Mean Temperature ◽  
Grain Yield And Quality ◽  
The Impact

During the grain growing months of May-July, the mean temperature on the Canadian prairies has cooled down by 2ºC in the last 30 years. The cooling appears to be most certainly linked to diminishing solar activity as the Sun approaches a Grand Solar Minimum in the next decade or so. This cooling has led to a reduction in Growing Degree Days (GDDs) and has also impacted the precipitation pattern. The GDDs in conjunction with mean temperature and precipitation are important parameters for the growth of various grains (wheat, barley, canola etc.) on the prairies. In this study, we investigate the impact of declining GDDs and associated temperature and precipitation patterns on Prairie grain yields and quality. Our analysis shows that there has been a loss of about 100 GDDs over the time frame of 1985-2019. The loss in GDDs is also linked to some of the large-scale Atmosphere-Ocean parameters like the Pacific Decadal Oscillation (PDO), North Pacific Index (NPI) and Arctic Oscillation (AO). Our analysis suggests grain yield and quality could be significantly impacted in the coming years as solar activity continues to diminish.

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