WWW.DISSERTATION.XLIBX.INFO
FREE ELECTRONIC LIBRARY - Dissertations, online materials
 
<< HOME
CONTACTS



Pages:     | 1 ||

«Abstract Tanks were an integral part of rural life in India traditionally. However, with decreasing collective action by the community inappropriate ...»

-- [ Page 2 ] --

4.0 Impact on Soil The clay content of the tank silt ranged from 60 to 80%, while its application to the field reduced the bulk density of the soil from 1.5 to 1.25 g cc-1. Addition of tank silt at the rate of 50, 100, 150 and 375 tractor loads per hectare improved the available water content by 0.002, 0.007, 0.012 and 0.032 g g-1 soil, respectively. All the farmers were in agreement that the moisture retention had gone up by 4 to 7 days, which plays an important role during the period of prolonged dry spells. This was confirmed through gravimetric studies that the available water content in the root zone increased by one per cent, i.e., from a normal 6% to 7% with addition of 100 tractor loads per hectare. Farmers believe that once applied, the impact on crop yield will remain for three years, but the invisible aspect is the permanent change in physical and chemical properties of soil. A change in the clay percent was noticed from 20 to 40 in the root zone, while there was no change in the silt content. A decrease in coarse sand and fine sand was noticed. No change in pH, EC and organic carbon was noticed, while an appreciable change was observed in available N, P and K and moderate reduction in sulphur. Improvement in clay content will not only retain higher moisture but will also reduce the losses of nutrients through leaching because of improved cation exchange capacity (CEC).

5.0 Impact on Crop Growth and Yield In an observation made on plant population and growth of rabi maize 45 days after sowing (DAS), indicated that not only silt-received-plot had higher plant population but also higher plant height (Table 5). Most of the farmers interviewed reported savings on fertilizers ranging from Rs. 2500 to Rs. 3750 per hectare in case of cotton, which is a major crop grown in this area. The increase in the yield of cotton was to the tune of 1000 kg ha-1. Farmers could achieve this kind of response with the application of 100 tractor loads per ha. Farmers paid Rs. 50-60 for each trip of tractor depending upon the distance plus Rs. 10 towards contribution. A farmer for 100 tractor loads paid Rs. 6000 towards transport and contribution while the project borne the rest of Rs. 6000.

The maximum benefit was obtained in chillies and cotton and the gain was negligible in turmeric and no gain was observed for maize (Fig. 2). A detailed cost of cultivation with and without application of silt for different crops is set out in Annex-I. An additional environmental benefit was obtained through less use of pesticides through application of tank silt. Farmers reported less number of sprays in various crops that received tank silt (Fig. 3). The number of sprays reduced by two compared to the normal, which resulted in saving of Rs. 2500 ha-1 in cotton, chilli and turmeric, respectively while Rs. 1750 ha-1 in maize.

–  –  –

31215 31075 30000 24620 20000 10210 10128 10000 7720

–  –  –

Figure. 3. Savings on pesticides with application of tank silt in various crops.

10

6.0 Economic Evaluation The economic feasibility of the removal of silt was estimated. The quantity of silt removed from different tanks amounted to 76393 tons. The total cost incurred in the removal of silt amounted to Rs. 11,33,190. The value of silt was quantified in terms of fertilizer equivalent costs for different nutrients. The nutrients retrieved from silt were considered to be beneficial as against the expenditure (cost) incurred in removing the silt from the tanks. The value for various nutrients is presented in Table 6. Additionally, the process of silt application to farm lands that is rich in organic C resulted in C mineralisation and higher nutrient availability, thereby helping plant growth and greater fixation of C through photosynthesis.

The benefit-cost ratio was found to be highly variable and ranged from 0.44 to 1.11, which is lower than the B:C ratio reported earlier for tank de-silting in Medak district (Padmaja et al. 2008). Average benefit-cost ratio of 0.72 is not reflecting the true picture as physical and other ecosystem benefits are not accounted. It is worth noting that fertilizers are supplied at 50% of the production cost and the government meets the rest as subsidy. If subsidy is accounted, the average B:C ratio will become 1.44 and recycling of silt back to the farm lands will become highly economical proposition. Indirect benefits are many and difficult to account in rupee terms. Application of the silt back to the agricultural fields forms an improved agricultural management practice that enhances and protects the soil quality, resulting in improved production capacity of the soil and reverses the process of land degradation. The impacts of recycling will be long lasting and need to be studied for longer period.

–  –  –

11 Estimation of silt requirement based on silt quality and crop need A simple formula has been devised to meet the crop nutrient requirement in terms of nitrogen equivalent. In general, tractors are used for transport of tank silt, therefore, estimation need to be made in terms number of tractor loads required to meet the need of a particular crop. The impact will be there on the successive crops too. An example of cotton is given below which has a recommended dose of 120 kg N ha-1. About 117 tractor loads are needed to meet N requirement of cotton using Koppula tank silt, having 0.0412% available N. Any increase in N content of tank silt will reduce the number of tractor loads needed per unit area. Therefore, preference may be given for de-silting of tanks having high fertility.





–  –  –

7.0 Policy Implications The past experiences of de-silting in Medak and Warangal indicate the presence of all the valuable nutrients required for plant growth in adequate quantities. Recycling of tank silt will overcome the deficiency of nutrients observed in many soils, particularly that of zinc, boron and sulphur and will also improve organic carbon content of soil, resulting in improved soil physical properties. The following interventions should be planned and implemented in view of economic viability, social acceptability and eco-friendliness of tank de-silting.

• Tank silt to be considered as a substitute for the fertilizer and a part of subsidy given to fertilizers need to be diverted for tank de-silting and recycling of nutrients to farm lands. Fertilizers provide one or two nutrients, while silt provides all the nutrients in adequate quantities and also improves soil health and water-holding capacity essential for drought-proofing in rain-fed areas.

• De-silting operations of the existing tanks could be included in the National Food for Work Programme, which creates employment as well as restores the asset for harvesting rainwater.

• Provide soft credit line to farmer to apply tank silt to the fields and credit support to various government programs/panchayats for undertaking de-silting operation.

12 References Bouyoucos GT. 1962. Hydrometer method improved for making particle size analysis of soils. Agronomy Journal 54:464-465.

Dalal RC, Sahrawat KL and Myers RJK. 1984. Inclusion of nitrate in the Kjeldahl nitrogen determination of soils and plant materials using sodium thiosulphate. Communications in Soil Science and Plant Analysis 15:1453-1461.

DHAN. 2004. Vision for village tanks of Tamil Nadu, Development of Humane Action (DHAN) Foundation, Madurai, Tamil Nadu. 34 pp.

Jenkinson DS. 1988. Determination of microbial biomass carbon and nitrogen in soil. In:

Advances in nitrogen cycling in agricultural ecosystems, ed JR Wilson, CAB International, Wallingford, Oxon, UK. pp. 368-386.

Jenkinson DS and Powlson DS. 1976. The effects of biocidal treatments on metabolism in soil: V.A method for measuring soil biomass. Soil Biology and Biochemistry 8:209-213.

Nelson DW and Sommers LE. 1982. Total carbon, organic carbon and organic matter. In:

Methods of soil analysis. Part 2 Chemical and microbiological properties. (AL Page, RH Miller and DR Keeney, eds.), American Society of Agronomy, Madison, WI, USA. pp. 539-579.

Olsen SR and Sommers LE. 1982. Phosphorus. In: Methods of soil analysis. Part 2.

Chemical and microbiological properties, (AL Page, RH Miller & DR Keeney, eds.), American Society of Agronomy, Madison, WI, USA, pp. 403-430.

Padmaja KV, Wani SP, Agarwal Lav and Sahrawat KL. 2003. Economic assessment of desilted silt in terms of plant nutrients equivalent: A case study in the Medak district of Andhra Pradesh. Global Theme 3: Water, Soil and Agrodiversity Management for Ecosystem Resilience. Report no. 4. Patancheru 502 324, Andhra Pradesh, India: International Crops Research Institute for the Semi-Arid Tropics. 24 pp.

Padmaja KV, Wani SP, Sahrawat KL and Jangawad LS. 2008. Economic evaluation of sediments as a source of plant nutrients. Current Science. Vol. 95, No. 8. 1042-1050.

Parkinson D. 1994. Filamentous fungi. In: Methods of soil analysis. Part 2. Microbiological and biochemical properties, (RW Weaver, JS Angle and PS Bottomley, eds.), Soil Science Society of America, Madison, WI, USA, pp. 329-350.

Rajendra Prasad. 2002. Sustainable agricultural production and integrated nutrient management. Souvenir: 2nd Intl. Agronomy Congress, November 26-30, 2002 held at New Delhi, India. pp. 57-66.

Rego TJ, Wani SP, Sahrawat KL and Pardhasaradhi G. 2005. Macro-benefits from boron, zinc and sulfur application in Indian SAT: A step for Grey to Green Revolution in agriculture. Global Theme on Agroecosystems Report No. 16, Patancheru 502 324, Andhra Pradesh, India : International Crops Research Institute for the Semi-Arid Tropics. 24 pp.

–  –  –

Wani SP, Mc Gill WB, Haugen-Koyzra KL, Robertson JA and Thurston JJ. 1994.

Improved soil quality and barley yields with faba-beans, manure, forages and crop rotation on a gray Luvisol. Canadian Journal of Soil Science. 74:75-84.

Wellington EMH and Toth IK. 1994. Actinomycetes. In: Methods of soil analysis. Part

2. Microbiological and biochemical properties, (RW Weaver, JS Angle and PS Bottomley, eds.), Soil Science Society of America, Madison, WI, USA. pp. 269-290.

Zuberer DA. 1994. Recovery and enumeration of viable bacteria. In: Methods of soil analysis. Part 2 Microbiological and biochemical properties, (RW Weaver, JS Angle and PS Bottomley, eds.), Soil Science Society of America, Madison, WI, USA. pp. 119-144.

–  –  –

Note: Varieties: RCH-2, Bollguard, Price: Rs. 18.0 kg -1 Cost of urea Rs. 255 per 50 kg, DAP Rs. 485 per 50 kg, MoP Rs. 232 per 50 kg Chillies

–  –  –

Note: Varieties grown: Bioseed, Kargil, Monsanto double, Price Rs. 4.90 kg-1 Cost of urea Rs. 255 per 50 kg, DAP Rs. 485 per 50 kg, MoP Rs. 232 per 50 kg 16 About ICRISAT The International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) is a non-profit, non-political organization that does innovative agricultural research and capacity building for sustainable development with a wide array of partners across the globe. ICRISAT’s mission is to help empower 600 million poor people to overcome hunger, poverty and a degraded environment in the dry tropics through better agriculture. ICRISAT is supported by the Consultative Group on International Agricultural Research (CGIAR).

–  –  –

www.icrisat.org 270-09

Pages:     | 1 ||


Similar works:

«FREQUENTLY ASKED QUESTIONS (FAQs): MINNESOTA’S STAFF DEVELOPMENT STATUTES Minnesota Statutes, sections 122A.60 and 122A.61 Created September 2001 Updated July 2002, March 2006, February 2008, November 2010, August 2013 In response to many interpretation and implementation questions about Minnesota’s staff development statutes, the organizations listed below have jointly developed this set of Frequently Asked Questions (FAQs). The statutes discussed in this set of FAQs can be found at Minn....»

«A STUDY OF CHILDREN’S MUSICAL PLAY AT THE LITTLE GYM A Thesis Submitted to the Graduate Faculty of Louisiana State University and Agricultural and Mechanical College in partial fulfillment of the requirements for the degree of Master of Music Education In The School of Music by Alison Elaine Alexander B.A, Mercer University, 2003 B.M.E., Armstrong Atlantic State University, 2005 August 2012 To Connor and Brady, my inspirations! ii ACKNOWLEDGEMENTS I would like to thank my committee for their...»

«Case Study form the EETAP WG4 Draft Report: Representation and Who Decides in Energy Planning Case Study of Mae Moh Power Plant, Lampang The Mae Moh coalfired power plant is located in the mountains of the Mae Moh district in Lampang province, Northern Thailand. The fuel source of the power plant is a lignite coal mine occupying an area of 135 square kilometers, and is located near the plant itself. The plant consists of 13 generating units and has a capacity of 2,625 Megawatts, and is owned...»

«A GREAT KOREAN MUSIC PIONEER MIN-CHONG PARK: A PERFORMANCE GUIDE OF HIS SELECTED VIOLIN WORKS A Dissertation Submitted to the Graduate Faculty of the Louisiana State University and Agricultural and Mechanical College in partial fulfillment of the requirement for the degree of Doctor of Musical Arts in The School of Music by Sin Myung Min B.A., Kookmin University, 2006 M.M., Temple University, 2009 December 2014 ACKNOWLEDGEMENTS I would like to express my deep appreciation to the members of my...»

«As. J. Food Ag-Ind. 2012, 5(02), 96-103 Asian Journal of Food and Agro-Industry ISSN 1906-3040 Available online at www.ajofai.info Research Article Effect of vacuum cooling on physico-chemical properties of organic coriander Apichart Sirinanuwat1, Danai Boonyakiat 2,3 and Pichaya Boonprasom 1,3* 1 Division of Food Engineering, Faculty of Agro-Industry, Chiang Mai University, Thailand, 50200 2 Department of Horticulture, Faculty of Agriculture, Chiang Mai University, Thailand, 50200 3...»

«“Creating future innovators and impact for education, industry, the professions and society” Nottingham Trent University Doctoral School School of Animal, Rural and Environmental Sciences PhD Projects 2016 Welcome to the Nottingham Trent University Doctoral School The Doctoral School provides a supportive environment and a thriving research culture that encourages you to reach your full potential as a research degree student. Valuing ideas, enriching society We encourage new ideas and new...»

«DYNAMIC PERFORMANCE OF BRIDGES AND VEHICLES UNDER STRONG WIND A Dissertation Submitted to the Graduate Faculty of the Louisiana State University and Agricultural and Mechanical College in partial fulfillment of the requirements for the degree of Doctor of Philosophy in The Department of Civil and Environmental Engineering By Suren Chen B.S., Tongji University, 1994 M.S., Tongji University, 1997 May 2004 DEDICATION To my parents, my wife and my son ii ACKNOWLEDGMENTS I am indebted to Professor...»

«Migration and Livelihood Transitions of Rural Farming Households by Seung Yong Han A Dissertation Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy Approved November 2014 by the Graduate Supervisory Committee: Scott T. Yabiku, Chair Jennifer E. Glick Victor Agadjanian ARIZONA STATE UNIVERSITY December 2014 © 2014 Seung Yong Han All Rights Reserved ABSTRACT The main purpose of this dissertation is to examine the effects of migration and household capitals...»

«52 Chimera 26: Geographical Journal, University College Cork Suburbia: social and spatial trends that emerged in Celtic Tiger Ireland. Matthew Williams Department of Geography, University College Cork, Ireland. Long after the roar of the “Celtic Tiger” has become inaudible; its effects remain in the form of ghost estates, incomplete rural development and inadequate service provision across the Irish landscape. This paper will give a brief account of suburban housing development in Ireland...»

«A prelude to agriculture: Game use and occupation intensity during the Natufian period in the southern Levant Item type text; Dissertation-Reproduction (electronic) Authors Munro, Natalie Dawn Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited...»

«ENVIRONMENTAL AND AGRONOMIC EVALUATION OF VALUE-ADDED NITROGEN FORTIFIED POULTRY LITTER AND BIOSOLIDS FERTILIZERS ENVIRONMENTAL AND AGRONOMIC EVALUATION OF VALUE-ADDED NITROGEN FORTIFIED POULTRY LITTER AND BIOSOLIDS FERTILIZERS A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Crop, Soil, and Environmental Sciences By Mark Stephen Reiter Virginia Polytechnic Institute and State University Bachelor of Science in Crop and Soil...»

«Best Management Practices for Agricultural Erosion and Sediment Control SONOMA COUNTY AGRICULTURAL COMMISSIONER’S OFFICE TABLE OF CONTENTS INTRODUCTION REGULATORY REQUIREMENTS CALIFORNIA TIGER SALAMANDER MAP CHAPTER ONE LAYOUT AND SITE DEVELOPMENT ENVIRONMENTAL CONCERNS SITE EVALUATION BEST MANAGEMENT PRACTICES EXAMPLE VINEYARD LAYOUT EXAMPLE VINEYARD LAYOUT NEAR STREAM CHAPTER TWO ROADS ENVIRONMENTAL CONCERNS SITE EVALUATION BEST MANAGEMENT PRACTICES FOR AGRICULTURAL ROADS EXAMPLE OUTSLOPED...»





 
<<  HOME   |    CONTACTS
2016 www.dissertation.xlibx.info - Dissertations, online materials

Materials of this site are available for review, all rights belong to their respective owners.
If you do not agree with the fact that your material is placed on this site, please, email us, we will within 1-2 business days delete him.