Abstract
Annualized yields with more intensive cropping (IC) systems tend to be greater than those of spring wheat–fallow (SW–F); however, little economic comparison information is available. The long‐term (12 yr) effects of tillage system and N fertilization on the economic returns from two dryland cropping systems in North Dakota were evaluated. An IC rotation [spring wheat ( Triticum aestivum L.)–winter wheat ( T. aestivum L.)–sunflower ( Helianthus annuus L.)] and a SW–F rotation were studied. Tillage systems included conventional till (CT), minimum till (MT), and no‐till (NT). Nitrogen rates were 34, 67, and 101 kg N ha −1 for the IC system and 0, 22, and 45 kg N ha −1 for the SW–F system. Annual precipitation ranged from 206 to 655 mm, averaging 422 mm over 12 yr. The IC system generated higher profits than the SW–F system, but the IC profits were more variable. Within the IC system, MT generated higher profits than corresponding N treatments under CT and NT, but MT profits were more variable. Of the N rates evaluated, the largest N rates generated the largest profits. The dryland IC system with MT and NT was more profitable than the best SW–F system using CT for this location. Stochastic dominance analyses revealed that the SW–F system and IC system CT treatments were economically inefficient when compared with the IC system with MT and NT.
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Claims 5
Claim · model-written summary
Intensive cropping generated higher but more variable profits than spring wheat–fallow.
- Treatment
- IC systeme0
- Outcome
- profitse0
- Direction
- highere0
- Qualifier
- more variablee0
- Comparator
- SW–F systeme0
Not reportedTaxon
Verbatim
e0“The IC system generated higher profits than the SW–F system, but the IC profits were more variable”
Claim · model-written summary
Within intensive cropping, minimum tillage generated higher but more variable profits than conventional and no tillage.
Not reportedTaxon
Verbatim
e0“Within the IC system, MT generated higher profits than corresponding N treatments under CT and NT, but MT profits were more variable”
Claim · model-written summary
The largest evaluated nitrogen rates generated the largest profits.
Not reportedTaxon
Verbatim
e0“Of the N rates evaluated, the largest N rates generated the largest profits”
Claim · model-written summary
Intensive cropping with minimum and no tillage was more profitable than the best conventional tillage wheat–fallow system.
- Treatment
- IC system with MT and NTe0
- Outcome
- profitablee0
- Direction
- more profitablee0
- Comparator
- SW–F system using CTe0
Not reportedTaxon
Verbatim
e0“The dryland IC system with MT and NT was more profitable than the best SW–F system using CT for this location”
Claim · model-written summary
Stochastic dominance found wheat–fallow and conventional tillage intensive cropping economically inefficient against minimum and no tillage intensive cropping.
Not reportedTaxon
Verbatim
e0“the SW–F system and IC system CT treatments were economically inefficient when compared with the IC system with MT and NT”