Claim · model-written summary
Crop rotation did not affect soil ammonium, extractable phosphorus or penetration resistance.
- Treatment
- crop rotatione0
- Outcome
- Ammonium-N, extractable P and penetration resistance (PR)e0
- Direction
- not affectede0
Not reportedTaxonMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Verbatim
e0“Ammonium-N, extractable P and penetration resistance (PR) of soil were not affected by crop rotation”
Title
M. A. Arshad; K. S. Gill; R. C. Izaurralde Journal of Sustainable Agriculture 1998. doi:10.1300/j064v12n02_10
Other claims from this paper (19)
- Observation Fallow reduced water-stable soil aggregates.
- Association Cropped plots had lower soil nitrate than fallow plots in two of three years.
- Association Continuous wheat tended to have more weeds than first- and second-year rotational wheat.
- Association Wheat appeared to suppress weeds more than canola, pea or fallow.
- Observation First-year rotational wheat grain production was 3.95 Mg ha−1 yr−1, significantly above second-year and continuous wheat.
- Observation First-year rotational wheat dry matter production was 10.7 Mg ha−1 yr−1, significantly above second-year and continuous wheat.
- Observation Grain and dry-matter production in two years of the four systems usually did not differ significantly.
- Observation Three-year grain yields of canola, pea and continuous wheat rotations exceeded fallow rotation by 1.10 to 4.19 Mg ha−1.
- Observation Three-year dry-matter yields of canola, pea and continuous wheat rotations exceeded fallow rotation by 4.3 to 8.7 Mg ha−1.
- Intervention effect Tillage did not affect soil nitrate, ammonium, phosphorus or water-stable aggregates.
- Intervention effect Tillage reduced soil penetration resistance.
- Intervention effect No-till controlled annual broadleaf weeds better.
- Intervention effect Conventional tillage controlled perennial weeds better.
- Intervention effect Conventional tillage produced 0.42 Mg ha−1 yr−1 more grain than no-till.
- Observation Rotation-by-tillage interactions for soil, weeds and yield were not significant.
- Association Canola and field pea were more beneficial previous crops than wheat for subsequent wheat production.
- Intervention effect Replacing fallow with a crop increased production and straw returned to soil.
- Intervention effect Replacing fallow with a crop reduced potential nitrate leaching.
- Intervention effect Replacing fallow with a crop improved soil water-stable aggregation.