Effects of some industrial organic wastes on maize grain yield and some soil properties
| dc.contributor.author | Timbula,Kastory Matembele | |
| dc.date.accessioned | 2025-09-10T08:39:56Z | |
| dc.date.available | 2025-09-10T08:39:56Z | |
| dc.date.issued | 2003 | |
| dc.description | Dissertation | |
| dc.description.abstract | A study was conducted to evaluate paper sludge and pyrethrum marc as alternative sources of plant nutrients using maize as a test crop. The study was carried out at Magadu Morogoro, Tanzania. Kaaya (1989) classified the soil of Magadu as Oxic Haplustult. Laboratory analyses revealed the soil to be clay, compacted and acidic with low CEC (11.2 Cmol(+) kg'1) Total nitrogen, (0.09 %) exchangeable Ca (1.77 Cmol (+)kg‘‘ ) and Na (0.67 Cmol (-j-)kg'1 were low, exchangeable K (0.69 Cmol (-i-)kg'1) and Mg (1.51 Cmol (-r)kg'1 were high, extractable Fe (46.48 mg kg'1) and Mn (70.06 mg kg'1) were very high while Cu (1.14 mg kg'1) and Zn (0.51 mg kg'1) were adequate for plant growth. Four rates of paper sludge and pyrethrum marc (0, 10, 20, and 30 tons ha'1) on air-dry basis were applied to soil in a randomized block design. The wastes were characterized before incorporation into the soil. Paper sludge and pyrethrum marc were alkaline and acidic in reaction respectively. Paper sludge had high C/N (37.7) C/P (245) and Ca/Mg (105.22) ratios .The high C/N and C/P ratios mean that biological immobilization of nitrogen and phosphorus would be the major limiting factors for this waste to be used as a source of plant nutrients. High Ca/Mg ratio indicates that paper sludge can be used as a liming material. Paper sludge had lower sodium adsorption ratio (SAR) (0.22) as compared to pyrethrum marc (0.62). This suggested that sufficient Ca and Mg are present to counteract the negative effects of sodium. Levels of Fe (333.4) Mn (543.71) Cu (21.00) and Zn (42.9) for paper sludge and 107.55; 901.85; 14.4 and 51.00 respectively for pyrethrum marc, were well within the limits for environmental pollution. Maize grain yield in plots amended with pyrethrum marc increased from 0.64 to 3.33 tons ha’1 with increasing iii rate of pyrethrum marc while in plots treated with paper sludge grain yield decreased from 1.43 to 0.52 tons ha"‘as the rate of application of paper sludge increased. The Increasing the rates of the wastes ameliorated the bulk density from 1.50 tol.38 mg cmrivas associated with decrease in soil bulk density. For pyrethrum marc treated plots, soil pH, OC, total N, extractable P and exchangeable Ca, Mg, and Na and CEC increased with increasing rates of the waste. Cu and Fe were significantly lowrelative to the control, and Zn was higher than the control. Soil pH, exchangeable Ca and CEC of the plots amended with paper sludge increased with increasing rates of the material from 5.28; 2.61; 10.57 to 7.7914.74; 14.20 respectively. Increasing the rates of paper sludge had a negative effect on exchangeable Mg, K, Na, and extractable P. Total nitrogen and organic carbon were not statistically different from for the lowest rate and 0.81 mgkg'1 for the highest rate of paper sludge). Zn was not statistically different compared to the control, and Fe was significantly lower than the control. Both wastes alleviated Al and Mn concentrations remarkably | |
| dc.identifier.uri | https://www.suaire.sua.ac.tz/handle/123456789/6972 | |
| dc.language.iso | en | |
| dc.publisher | Sokoine University of Agriculture | |
| dc.subject | Organic wastes | |
| dc.subject | Maize grain | |
| dc.subject | Soil properties | |
| dc.subject | Paper sludge | |
| dc.subject | Pyrethrum marc | |
| dc.title | Effects of some industrial organic wastes on maize grain yield and some soil properties | |
| dc.type | Thesis |