An Asian Journal of Soil Science

G. V. Prabhakara Reddy ¹, C. A. Srinivasamurthy ², B. G. Vasanthi ³, M. S. Nagaraja ²

Affiliations
1 Nokia L and C, Bengaluru (Karnataka), IN
2 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences (G.K.V.K.), Bengaluru (Karnataka), IN
3 Krishi Vigyan Kendra, Hadonahalli, Bengaluru (Karnataka), IN

Abstract

Physically degraded lands are characterized with high graveliness and low nutrient status resulting in sparse vegetation hence, external supplementation of nutrients is essential for successful vegetation establishment. The soil pH and EC was similar to that of normal soil in degraded lands. However, the organic carbon and nutrient status were low in wastelands with higher BD of 1.62 gcc^-1. The evaluation of different organic wastes such as paper mill sludge, sugar mill sludge, distillery sludge and municipal sludge along with FYM as a nutrient source for degraded lands reveled that N and P content was highest in sugar mill sludge followed by municipal sludge while K content and secondary nutrients such as calcium and sulphur were found highest in distillery sludge. In case of micro nutrients high levels of Fe (1550 ppm) and Mn (407 ppm) was observed in paper mill and sugar mill sludge, respectively. The Zn (2329 ppm) and Cu (448.4 ppm) were recorded in municipal sludge. The different organic sources were rated as sugar mill sludge, municipal sludge, distillery sludge, FYM, paper mill sludge.

Keywords

Degraded Lands, Organic Sludges, Nutrient Sources.

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G. V. Prabhakara Reddy ¹, M. S. Nagaraja ², B. G. Vasanthi ³, C. A. Srinivasamurthy ⁴

Affiliations
1 Navteq, Manjunathnagar, Bengaluru (Karnataka), IN
2 Department of Soil Science and Agricultural Chemistry, University of Horticultural Sciences, Bagalkot (Karnataka), IN
3 Krishi Vigyan Kendra, Hadonahalli (Karnataka), IN
4 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences (G.K.V.K.) Bengaluru (Karnataka), IN

Abstract

The large quantities of organic wastes (sludges) generated by industries are plant nutrients. Thus in point of national development, safe disposal of these wastes play a major role. On other hand, rising of sapling in forest nursery has been incurred large production cost due to higher nutrient demand. Thus, nutrient rich organic wastes provide an opportunity to utilize them as nutrient source in place of conventional organic manures. In this context, an attempt was made to utilize nutrient rich organic wastes as source of manure in forest nursery. The various organic wastes collected from different sources were analyzed for their nutrient content. The organic wastes were mixed in the ratio of 1:1:1 and 1:1:2 of sand:soil:organic wastes and then filled into polyethylene bags. Two months native saplings of Acacia auriculiformis, Pterocarpus marsupium, Azadirachta indica, Holoptelea integrifolia and Tectona grandis were planted and growth parameters were monitored at monthly interval. The plants growth varied significantly due to application organic wastes at both the level. The growth was influenced by the wastes in the order of distillery sludge > municipal sludge > sugar mill sludge > FYM > paper mill sludge. In general the wastes at higher level recorded higher growth compared to that of lesser rate. Among the different species selected for the study the height (cm), collar diameter (mm) and bigmass (g) was measured in the order-Azadirachta indica > Acacia auriculiformis > Tectona grandis > Holoptelea integrifolia > Pterocarpus marsupium. The overall results suggest that the sewage sludge and agro industrial wastes can be effectively and efficiently used for raising of forest nursery.

Keywords

Organic Wastes, Forest Saplings, Soil Nutrients.

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B. Gayathri ¹, T. Bhagya Lakshmi ¹, B. G. Vasanthi ¹, L. Suseela Devi ¹

Affiliations
1 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN

Abstract

Composting of poultry manure cage litter and deep litter with organic and inorganic additives in various combinations were taken up and change in chemical and biochemical properties over the period of composting were studied. The composts were tested for efficiency interms of agronomic productivity using a test crop. The organic carbon, C:N ratio, lignin, cellulose and total phenol contents decreased where as nutrient content and humic substances increased during composting. After four months, humic substances were higher in compost treatments compared to poultry manure kept for aging. Compost treatments recorded higher dry matter yield of Maize over control (100% RDF+FYM @ 10 t ha^-1). Composted poultry manure cage litter treated with sericulture waste, green manure, cowdung and urea with 50 per cent RDF recorded a maximum of 257 per cent increase in dry matter yield of maize over control and fresh poultry manure treatments.

Keywords

Poultry Manure, Composting, Fodder Maize, Yield and Nutrient Uptake.

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