Determining optimum applied water and seeding rates for winter wheat by using AquaCrop and mathematical‐economic analysis 1

2021 ◽  
Author(s):  
Mohammad Mehdi Moghimi ◽  
Ghazaleh Shamshiri ◽  
Ali Shabani ◽  
Ali Akbar Kamgar‐Haghighi ◽  
Mina Fateh ◽  
...  
Keyword(s):  
Economic Analysis ◽  
Winter Wheat ◽  
Mathematical Economic ◽  
Applied Water

Economic Returns from Cheat (Bromus secalinus) Control in Winter Wheat (Triticum aestivum)

1990 ◽  
Vol 4 (2) ◽  
pp. 306-313 ◽  
Author(s):  
Kenneth L. Ferreira ◽  
Thomas F. Peeper ◽  
Francis M. Epplin
Keyword(s):  
Triticum Aestivum ◽  
Economic Analysis ◽  
Winter Wheat ◽  
Field Experiments ◽  
Control Strategies ◽  
Economic Returns ◽  
Forage Production ◽  
Net Returns ◽  
Seeding Date ◽  
Bromus Secalinus

Field experiments were conducted to determine the influence of winter wheat seeding date and forage removal on the efficacy of cheat control herbicides, forage and grain yields, and net returns to land, overhead, risk, and management for the various cheat control strategies. Economic analysis showed that net returns were higher when wheat was seeded during the traditional seeding period (October) than when either seeded early (September) for increased forage production or delayed (November) for cultural cheat control. Some herbicides were economically beneficial at two of three locations where the initial cheat population exceeded 170 plants/m2.

Law and Economics of Evidence

2017 ◽  
Author(s):  
Chris William Sanchirico
Keyword(s):  
Economic Analysis ◽  
Private Information ◽  
Law And Economics ◽  
Economic Modeling ◽  
Mathematical Economic ◽  
Legal Evidence ◽  
Academic Literature ◽  
Character Evidence

The legal field of evidence concerns how deductions regarding acts and circumstances are or should be made from testimony, documents, and other presentations, whether proffered by interested parties or uncovered by the factfinder’s own investigation. This chapter describes the portion of the academic literature on legal evidence that employs mathematical/economic modeling. It begins by reviewing the four main mathematical/economic approaches: pure probabilistic deduction, omission models, endogenous cost signaling, and correlated private information. Then it discusses the application of mathematical/economic analysis to several specific evidentiary rules, including character evidence, hearsay, privileges, proof burdens, and penalties for evidentiary misconduct.

The effects of tillage systems on the economic performance of spring wheat, winter wheat, flax and field pea production in east-central Saskatchewan

1993 ◽  
Vol 73 (1) ◽  
pp. 47-54 ◽  
Author(s):  
G. P. Lafond ◽  
R. Geremia ◽  
D. A. Derksen ◽  
R. P. Zentner
Keyword(s):  
Economic Analysis ◽  
Winter Wheat ◽  
Spring Wheat ◽  
Economic Performance ◽  
Field Pea ◽  
Management Systems ◽  
Short Term ◽  
Tillage Systems ◽  
Net Returns ◽  
Costs Of Production

The long-term viability of Canadian prairie agriculture depends on the ability to arrest soil degradation caused by wind and water erosion and excessive tillage. The challenge is to develop crop-production systems that are economically viable and environmentally sustainable. The objective of this study was to quantify the short-term economic performance of field pea (Pisum sativium L.), flax (Linum usitatissimum L.) and spring and winter wheat (Triticum aestivum L.) grown under three tillage-management systems. The economic analysis was based on a tillage × crop rotation experiment started in 1986 and involving zero tillage (ZT), minimum tillage (MT) and conventional tillage (CT) and three 4-yr crop rotations. The economic analysis considered only costs associated with purchased inputs and machinery. The effects of method of tillage management on herbicide and fuel use were also determined for each crop. Costs of production were similar for all tillage systems and crop types. Net returns were higher for field pea, flax and spring wheat grown on stubble using ZT and MT than when CT was used, because of higher grain yields. Net returns were similar for winter wheat grown on stubble and for spring wheat grown on fallow for all tillage-management systems. Fuel consumption was highest for CT, intermediate for MT and lowest for ZT for all crops except winter wheat. In contrast, herbicide use was greater for ZT and MT than for CT for al crops except winter wheat; no differences were observed among tillage systems for this crop because it was always seeded directly into standing stubble. The shift from CT to ZT or MT systems did not increase costs of production or reduce short-term economic returns. ZT and MT had higher production potential than CT because increased soil-moisture conservation generally provided higher net returns. ZT used less fuel but more herbicides than MT and CT. Key words: Stubble cropping, fallow cropping, zero, minimum, conventional

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