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PROJECT TOPIC AND MATERIAL ON EFFECT OF COMBINED APPLICATION OF COMPOSTED RICE STRAW AND INORGANIC FERTILIZER ON AVAILABLE SOIL NUTRIENTS AND TOMATO YIELD IN JEGA KEBBI STATE
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- Name: Effect Of Combined Application Of Composted Rice Straw And Inorganic Fertilizer On Available Soil Nutrients And Tomato Yield In Jega Kebbi State
- Type: PDF and MS Word (DOC)
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CHAPTER ONE INTRODUCTION
- Background of the Study
Agriculture contributes more than 40 % to GDP, 80 % of foreign exchange earnings, 70 % of raw material for domestic industries, and 85 % of employment for the population in Nigerian economy. The country still has a sizeable number of households that are food insecure due to lack of balance between food production and the feeding population. The situation is also further aggravated by a number of environmental challenges (like soil fertility degradation, deforestation, rainfall variability, etc), resulting directly or indirectly from human activities due to unsustainable agricultural practices, rapid population growth, and consequently increase in the exploitation of natural resources (Getachew, 2011).
Decreasing soil productivity has become a global concern as soil fertility is diminishing gradually for many reasons including soil erosion, nutrient mining, accumulation of salts and other toxic elements. Intensification of agriculture emphasizes heavy use of inorganic fertilizers, which leads to adverse environmental effects. Many efforts are being exercised to combat these, the unfavorable consequences of chemical farming (Faheed et al., 2008). As a solution, organic fertilizers have emerged as a promising component of integrating nutrient supply system in agriculture.
Fertilizers specifically, DAP and Urea was used for crop production as major inorganic fertilizers in Nigeria. However, blended fertilizers have been introduced recently. With the increasing population and decreasing land availability for agricultural production, fertilizer has become the leading resource for increased productivity per unit area. However, smallholder farmers do not afford full levels of recommended inorganic fertilizer application. Although, balanced use of both macro and micro nutrients in crops plays significant role in increasing the yield, it may not be available from inorganic fertilizers. Besides, the world agriculture focuses on Integrated Soil Fertility Management
(ISFM) which has enhanced the need of eco-friendly organic farming in agriculture sector (Amrit, 2006).
Biogas dregs and slurry are by-products of biogas generated during gas production. These residues, especially biogas slurry, are a good source of plant nutrients and can improve soil properties (Garg et al., 2005). In Nigeria, few crop residues are often retained on farmers’ field due to their competitive use in livestock feed, energy, cash source and construction material. Given the poor economic capacity of smallholder farmers, the inorganic fertilizers used for crop production are still at inadequate rates (Girma, 2016).