Claim · model-written summary
High rates of potassium, enhanced by ploughing in crop-residue ash, seriously reduced the soil exchangeable Mg:K cation ratio.
- Treatment
- high rates of potassium, enhanced by ploughing in crop-residue ashe0
- Outcome
- exchangeable Mg: K cation ratioe0
- Direction
- seriously reducede0
Not reportedTaxonMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Verbatim
e0“high rates of potassium, enhanced by ploughing in crop-residue ash, seriously reduced the exchangeable Mg: K cation ratio and maize magnesium status”
Title
Effects of Fertilizers on Exchangeable Cation Ratios and Crop Nutrition in Northern Nigeria
M. J. Jones; K. R. Stockinger Experimental Agriculture 1976. doi:10.1017/s0014479700007055
Other claims from this paper (7)
- Intervention effect Annual applications of calcium, potassium and nitrogen over three years caused significant differences in soil exchangeable cation ratios.
- Intervention effect The fertilizer applications caused significant differences in the yields of subsequent groundnut crops.
- Intervention effect The fertilizer applications caused significant differences in the yields of subsequent maize crops.
- Intervention effect High rates of potassium and nitrogen combined with low rates of calcium lowered groundnut yields.
- Intervention effect High rates of potassium, enhanced by ploughing in crop-residue ash, seriously reduced maize magnesium status.
- Association Maize yields were significantly negatively correlated with soil potassium status.
- Recommendation The authors conclude that the balance between exchangeable cations in these soils is very easily upset by injudicious combinations of fertilizers and management practices.