HomeInternational Rice Research Notesvol. 30 no. 1 (2005)

Chemical properties of lateritic soil and yield of rice as influenced by addition of fly ash

S. Rama Subramoniam | A. Chandrasekaran

Discipline: Chemistry, Agriculture



Fly ash is a waste product from thermal power stations. It has no economic use and it is a pollution hazard. Coir pith is an organic waste and rice husk ash is a rare waste product from rice mills. A study was undertaken to assess the use of these waste materials in improving the lateritic soils of Kanyakumari District, Tamil Nadu, India, under irrigated rice cultivation. In this area, rainfall is more than 1,500 mm. Because of slow soil reaction during rice cultivation, most of the macroand micronutrients are not in the available form, resulting in low productivity. A field experiment was conducted in a farmer's field. The lateritic soil has a pH of 4.79. Rice variety ADT37 was used. Different combinations of fly ash (10 and 15 t ha-1) with different doses of lime, rice husk ash (12.5 t ha-1), raw coir pith (12.5 t ha-1), and coir pith compost (12.5 t ha-1) were tried in a randomized block design with three replications. Initial and postharvest soil samples were collected and their chemical properties analyzed (Jackson 1973). Grain and straw yields were also recorded.