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Similar to the results of this study, their tests found that horse and mink manure resulted in the greatest improvement in plant growth. However, Muenchang and associates (2006) found the sugar mill by-products improved the nitrogen fixing ability of plants by encouraging the development of certain bacteria on the roots.
There are many field trials that are similar to those conducted in this study. Tuber yield and size were not affected significantly by the application of straw mulch on potatoes (Doring, et al., 2005). However, La Mondia and associates (1999) found that straw applied to potatoes increased yield in tubers exposed to certain potato pathogens. High concentrations of compost were found to improve plant growth, but reduce dry mass in sorghum (Harini, Rupela, & Reddy, 2006). Citius pulp was found to reduce the incidence of root and crown rot in peppers (Kim, Nemec, & Musson, 1997). This may be due to the effect of pH on microbial growth.
Environmental factors play a significant role in field trial results. Rainfall was found to be a greater factor in cow-pea trials than the application of dairy cow compost (Muir, 2002). The application of dairy manure in legume field trials did not improve yields, but increased crabgrass competition (Nguluve, et al., 2004). This is an important factor that may effect the practical application of these results. This study was conducted in a simulated environment and is it not known if these findings will carry over into the field.
Conclusion
The results of this study indicate that only hypothesis one holds true. The application of manure to soil produced a slight improvement over the other amendments. Sugar seemed to decrease plant production and yield. In order to come to a conclusion, in this case, one must consider these findings in relation to the body of...
Field and lab results varied regarding the results of various applications of compost amendments. Manure stood out in many trials as a superior soil amendments. However, it must be cautioned that rainfall and local conditions can significantly effect the results obtained.
References
Doring, T., Brandt, M., Heb, J., Finckh, M., & Saucke, H. (2005). Effects of straw mulch on soil nitrate dynamics, weeds, yield and soil erosion in organically grown potatoes. Field Crop Research, 238-249.
Hameeda, B., Harini, G., Rupela, P. & Reddy, G. (2006). Effect of composts or vermicomposts on sorghum growth and micorrhizal colonization. African Journal of Biotechnology. 6 (1), 9-12.
Kim, K., Nemec, S., & Musson, G. (1997). Control of Phytophtora root and crown rot of bell pepper with composts and soil amendments in greenhouse. Applied Soil Ecology. 5, 169- 179.
La Mondia, J., Gent, M., Ferrandino, F., & Elmer, W. (1999). Effect of compost amendment or straw mulch on potato early dying disease. Plant Disease. 83: 361-366.
It is argued that while land tenure data can be instrumental in addressing land-related conflicts, much of the practical value is lost because of inconsistency of information and because information is not readily accessible, or cannot be combined to allow for greater depth of analysis. In practice, this means that policy-makers cannot make immediate use of the information that is available because additional time and expense are required either