The objective of the following work was to evaluate the agronomical behavior of two kinds of Swiss chard fertilized with earthworm humus, and at the same time to know the yield and the costs of production. This work was done in the community of Letanias, located 32 km. from the Department of La Paz and at an altitude of 3860 meters above sea level. Two kinds of Swiss chard were used in this work, Fordhook Giant and Petoseed C003. The three doses of earthworm humus, used as fertilizers, were a2, a3, and a4. The quantity of fertilizer used was 1314, 3560, and 5806 kg per acre, respectively. The Swiss chard was cultivated in a moderate environment, which was in an underground greenhouse with a depth of 1.80 meters. This was so due to the better thermal conditions. Fordhook Giant was the kind that had the best agronomical behavior, reaching an average size of 47.6 cm. for the length of the leaves. From the three levels of Factor A in study, level a3 had the best yield giving an average of 18.1 kg/m^2 of green matter, to which a dosage of 3438 kg. of earthworm humus was applied per acre. The length of the leaves reached an average size of 51.3 cm. The protein content in the Swiss chard leaves increased due to the application of earthworm humus to the ground, thus improving their nutritional quality. The physical and especially the chemical properties were affected positively by the incorporation of earthworm humus. The B/C economic analysis shows that when the earthworm humus is used, the net benefits increase, therefore the farmer family will have a higher income which will help them improve their quality of life.
| Identifer | oai:union.ndltd.org:BGMYU2/oai:scholarsarchive.byu.edu:etd-6451 |
| Date | 01 January 2000 |
| Creators | Von Boeck, Walter |
| Publisher | BYU ScholarsArchive |
| Source Sets | Brigham Young University |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | Theses and Dissertations |
| Coverage | La Paz (Bolivia) |
| Rights | http://lib.byu.edu/about/copyright/ |
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