Effects of organic manures and fertilizers on organic matter and nutrients status of the soil

Abstract

A long-term field demonstration was initiated in 1995 to evaluate the effect of organic manures (FYM, poultry manure and pressmud) and mineral fertilizers on changes of pH, electrical conductivity (EC), organic C and nutrient contents under pearl millet -wheat cropping sequence. Continuous application of organic manures alone or in conjunction with NP fertilizer for 10 years decreased the soil pH. However, a reverse trend was observed in case of EC. Organic C content of the soil decreased from its initial value, when only NP fertilizers were applied and increased significantly with the application of organic manures applied alone or with NP fertilizers. The highest organic carbon content of the soil has approached to 0.99% in plot receiving 15 Mg FYM þ150 kg N þ30 kg P 2 O 5 ha 71 . The application of organic manures with or without NP fertilizers could not sustain the original level of N. However, their application increased the available P, K and DTPA extractable Zn, Fe, Mn and Cu content of soil. Application of P, K and micronutrients can be avoided with the application of organic manures. The build-up of organic C and nutrient contents was higher in surface soil as compare to subsurface soil.

Use of Integrated Nutrient Management to Enhance Soil Fertility and Crop Yield of Hybrid Cultivar of Brinjal (Solanum melongena L.) Under Field Conditions

“…in sewage sludge. Antil & Singh [5] also reported that different organic manures were found to be loaded with OC, TKN, PO 4 3-and K + and their application significantly increased the nutrients and enhance the soil fertility. Therefore, all the treatments used in the present study were found to be loaded with plant nutrients and may enhance the soil fertility.…”

“…Agriculture remains a soil-based industry, there is no way that required yield increases of the major crops can be attained without ensuring that plants have an adequate and balanced supply of nutrients [5][6][7]. The appropriate environment must exist for nutrients to be available to a particular crop in the right form, in the correct absolute and relative amounts, and at the right time for high yields to be realized in the short and long term [6][7][8][9].…”

Effects of Combined Application of Inorganic Fertilizer and Organic Manures on Nitrogen Use and Recovery Efficiencies of Hybrid Rice (Palethwe-1)

“…Antil and Singh [69] also reported that the application of organic manures, such as cow or poultry manure, in conjunction with mineral fertilizer was very effective in sustaining crop productivity. Moreover, the integrated use of organic and inorganic fertilizers also has environmental benefits, as it reduces both chemical fertilizer usage and N losses, and allows for sustainable crop production [70].…”

Nitrogen Use Efficiency of Low Land Rice as Affected by Organic and Chemical Sources

“…Therefore, only CM application might not produce an optimal rice yield. Recently, many researchers including [23] [24] and [25] indicated that use of organic manures in conjunction with mineral fertilizer is very important for ensuring better soil health and sustaining crop productivity. Therefore, a mix application of manures with mineral N fertilizer might provide high inorganic N in soil and higher crop production.…”