Abstract
The mineral nutrient ratios are parameters for evaluating the crop nutritional balance through foliar analysis. This study aimed to verify the correlations between the main mineral nutrient ratios in leaves and the cacao productivity of 48 cropping areas. The chemical analyses were carried out to determine foliar N, P, K, Ca, Mg, S, Fe, Zn, Cu and Mn nutrient concentrations. The Zn/Cu and the Ca/Mg ratios showed a positive nutritional relation with cacao productivity. The ratios with Cu as denominator – Mn/Cu, Ca/Cu, Mg/Cu, P/Cu, N/Cu and K/Cu – also showed a positive nutritional relation with cacao productivity. The P/Zn and N/Zn nutrient ratios showed a negative nutritional relation with the cacao productivity.
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Claims 4
Claim · model-written summary
Zn/Cu and the Ca/Mg ratios had a positive relation with cacao productivity.
- Taxon
- cacao
Theobroma cacaoe0 - Outcome
- cacao productivitye0
- Direction
- positivee0
- Qualifier
- Zn/Cu and the Ca/Mg ratiose0
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Zn/Cu and the Ca/Mg ratios showed a positive nutritional relation with cacao productivity.”
Claim · model-written summary
Mn/Cu, Ca/Cu, Mg/Cu had a positive relation with cacao productivity.
- Taxon
- cacaoTheobroma cacaoe0
- Outcome
- cacao productivitye0
- Direction
- positivee0
- Qualifier
- Mn/Cu, Ca/Cu, Mg/Cue0
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ratios with Cu as denominator – Mn/Cu, Ca/Cu, Mg/Cu, P/Cu, N/Cu and K/Cu – also showed a positive nutritional relation with cacao productivity.”
Claim · model-written summary
P/Cu, N/Cu and K/Cu had a positive relation with cacao productivity.
- Taxon
- cacaoTheobroma cacaoe0
- Outcome
- cacao productivitye0
- Direction
- positivee0
- Qualifier
- P/Cu, N/Cu and K/Cue0
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ratios with Cu as denominator – Mn/Cu, Ca/Cu, Mg/Cu, P/Cu, N/Cu and K/Cu – also showed a positive nutritional relation with cacao productivity.”
Claim · model-written summary
P/Zn and N/Zn nutrient ratios had a negative relation with cacao productivity.
- Taxon
- cacaoTheobroma cacaoe0
- Outcome
- cacao productivitye0
- Direction
- negativee0
- Qualifier
- P/Zn and N/Zn nutrient ratiose0
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The P/Zn and N/Zn nutrient ratios showed a negative nutritional relation with the cacao productivity.”