Nutrient Dynamics in Wetland Organic Vegetable Production Systems in Eastern Zambia
Bibliographic record
Abstract
<p>The aim of this study was to determine effects of organic inputs on vegetable crops and on a subsequent maize crop grown in wetlands. The following treatments were applied to cabbage (<em>Brassica oleracea</em>) and onion (<em>Allium cepa</em>) crops: <em>Gliricidia</em> <em>sepium </em>(Gliricidia) biomass (8 t ha<sup>-1</sup>), Gliricidia<em> </em>biomass (12 t ha<sup>-1</sup>), cattle manure (10 t ha<sup>-1</sup>) with half recommended fertilizer rate, and recommended fertilizer rate (800 kg ha<sup>-1</sup> basal dressing and 250 kg ha<sup>-1</sup> top dressing fertilizer). The residual effect of the treatments was tested on a subsequent maize crop. The soil at the sites had low organic matter content (average 2%) and it was acidic (average pH 4.4). Soil inorganic N increased significantly from 11 mg kg<sup>-1</sup> in the unfertilized crop to 22 mg kg<sup>-1</sup> in the Gliricidia treatments after cabbage, and from 10.3 mg kg<sup>-1</sup> to 37.2 mg kg<sup>-1</sup> after the onion crop. There were significant differences (P&lt;0.05) in onion and cabbage yields and in subsequent maize yield in both cabbage and onion plots. This study concluded that the application of high quality Gliricidia prunings lead to rapid release of N and higher vegetable yields. However, there is a high amount of residual N that can be leached.</p>
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".