Organic fertilizers and plant establishment in selected tropical food crops
1995
Sangakkara, U.R. (University of Peradeniya (Sri Lanka). Faculty of Agriculture)
Influence of chemical substances in decomposing organic matter on growth of plants is often identified. While the most significant influence of decomposing organic fertilizers could be expected at the tender growth stages of food crops, research does not adequately quantify this phenomenon. Thus, a study was developed to determine the influence of selected animal and plant organics on the process of germination and establishment of four common tropical food crops, having different seed characters. Animal based manures, when applied at the time of planting had the most detrimental impact on germination and emerging plants. This was most significant in small seeded species with weak seedlings. The adverse effects of plant based organics were lower in all species. All organics produced the best results when incorporated into soils rather than when applied to the surface. Application of the organics before planting to allow a period of decomposition produced the best results. The observations present suggestions for developing guidelines for the use of organics to ensure successful crop establishment of different tropical food crops.
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