Lecture 34 Leaching requirements - irrigation and drainage water quality recycling of drainage water for irrigation.

Slides:

Advertisements

Similar presentations

IN THE NAME OF ALLAH, THE COMPASSIONATE, THE MERCIFUL.

Advertisements

RiverSalt A spreadsheet program Water and salt balances along rivers in (semi)arid zones that provide water for irrigation and receive drainage return.

Layout. Soil Texture Describe Topography Topography Maps.

Soil Salinity/Sodicity/Alkalinity and Nutrients

Irrigation techniques in tomato Previous NextEnd.

What is the most appropriate irrigation method. Key issues capital v. recurrent costscapital v. recurrent costs salinisation risk,salinisation risk, uniformity,uniformity,

Electrical conductivity, EC A quick method to measure the salinity of water. EC is approximately one-tenth of the total dissolved cation, or anion concentration.

Desertification: Degrading Drylands About one-third of the world’s land has lost some of its productivity because of drought and human activities that.

Introduction to Surface Irrigation

Drainage is the artificial removal of water from the cropped fields within the tolerance limit of the crops grown in the area under consideration.

The Effect of Soil Hydraulic Properties and Deep Seepage Losses on Drainage Flow using DRAINMOD Debjani Deb 26 th April, 2004.

IRRIGATION METHODS. IRRIGATION METHODS Contents: Definitions Objective of irrigation methods Choice of irrigation methods Requirements of irrigation.

Recent study indicates an available supply of water of little more than 1,000 m³ per person, which puts Pakistan in the category of a high stress country.

Making Electrical Conductivity Meaningful Gaylon Campbell Decagon Devices, Inc. Pullman, WA.

Irrigation Water Management

Soil. Chemistry Review Cation: atom that forms a positive charge (example: Ca +2 ) anion: atom that forms a negative charge (example: S -2 )

DRAINAGE REQUIREMENT IN BANANA NextEnd. INTRODUCTION  Poor drainage is a major cause of reduced yield and quality of bananas.  In many cases, the effects.

Subsurface drainage – Investigations

. Introduction Rice crop is sensitive to water stress causing reduction in quality and quantity of yield. Therefore management of irrigation is of uttermost.

The Hydrologic Cycle. Summary Water is a limited resource. Growers (farmers) have a responsibility to conserve water. Water can be conserved by capturing.

Irrigation. Irrigation Requirements   Know how much your plants need.   Know how much water each part of your watering system applies.   Match your.

Environmental Science

Soil Electrical Conductivity

Sustainable Food Production. Questions for Today: What is Soil? What is Soil Erosion? What is desertification, salinization, waterlogging? What are ways.

WATER CONSERVATION and WATER QUALITY. WATER CONSERVATION The HYDROLOGICAL CYCLE - Runs on solar energy The HYDROLOGICAL CYCLE - Runs on solar energy.

Coping with water scarcity Crop and Environmental Sciences Division International Rice Research Institute Los Baños, Philippines.

Fertilizers and Tillage PLS 38609/23/05 Outline of topics: I. Land preparation II. Tillage systems III. Tillage implements.

FURROW IRRIGATION & SUBIRRIGATION P.PRAKASH BTE

Next End Soil suitability and management for Grapes production.

SWC 302 IRRIGATION AND DRAINAGE ENGINEERING (2+1) Dr.K.Shanmugasundaram Professor & Head Dept. of SWC Engg. and Agrl. Structures AEC&RI, KUMULUR.

Improving irrigation practice for growing vegetables on sandy soils Rohan Prince and Robert Deyl.

Irrigation in Saskatchewan Project Presentation from 2001 Used as notes 2002.

Organic matter contribution Improved drainage Decreased salinity and leaching Better water use in following crops The Rotational Benefits of Forages: Soil.

T9-1 Soil Science & Management, 4E Chapter 9 Drainage and Irrigation.

Virtual Academy for the Semi Arid Tropics Course on Insect Pests of Groundnut Module 3: Soils and Climatic requirements After completing this lesson, you.

Salinisation Soil salinisation is one of the major threats in irrigation agriculture. Soil salinity causes yield losses and can lead to structural instability.

Introduction Water is an essential resource affecting growth, development and yield of crops. Potato is very sensitive to water availability as potatoes.

WATER LOGGING & SALINITY

After completing this Lesson, you have learned to answer: 1.Why pearl millet yields are often low when grown under rainfed conditions? 2.How irrigation.

After successful completion of this Lesson, you have learned to answer: 1.Why sorghum yields are often low when grown under rainfed conditions? 2.How irrigation.

1- When the land topography is irregular, and hence unsuitable for surface irrigation. 2- When the land gradient is steeper. 3- When the soil is highly.

You have learnt from the lessons in the earlier Modules that soil properties influence soil health. These soil properties in turn are affected by the agricultural.

Unit A5-4 Plant Science. Problem Area 5 Initiating Plant Growth.

Some Basic Soil info.

© 2011 Pearson Education, Inc. AP Environmental Science Mr. Grant Lesson 59 Lab: Soil Salinization Part 1.

Introduction to Land Evaluation Basic Soil Science AFNR-BAS-6: Describe soil formation and management and assess its relevance to plant/animal production.

Irrigation Efficiency or IE Water applied is never 100% beneficially used. There is always some loss Evaporation from soil and leaf surface Evaporation.

IRRIGATION TECHNIQUES IN TOMATO

SOIL WATER MOVEMENT Naeem Kalwar Langdon Research Extension Center Abbey Wick Extension Soil Health Specialist Main Campus.

College of Agriculture & Life Sciences Arizona Cooperative Extension University of Arizona Paul Brown Charles Sanchez Kurt Nolte Irrigation Management.

Salinization and Waterlogging Cheyenne Curling, Arieanna Lester, Nathan Gizaw.

INTEGRATED WATER MANAGEMENT FOR FOOD AND ENVIRONMENT: THE CASE OF GHAGGAR –YAMUNA PLAIN NARENDRA KUMAR TYAGI NARENDRA KUMAR TYAGI 6: AGRO INDUSTRIES AND.

SEMINAR ON METHODS OF IRRIGATION

MANAGEMENT OF POOR QUALITY WATER FOR IRRIGATION

AE 152 IRRIGATION & DRAINAGE

Irrigation and drainage 7.1Irrigation The most limiting factor to all year round food production in the tropics is lack of water in the dry season. This.

MOTHER THERESA INST OF ENGG&TECH IRRIGATION OF WATER (DUTY&DELTA) PRESENTED BY.

Factors affecting Duty and Improvement Measures

Irrigation & Agriculture

IRRIGATION MANAGEMENT PBT-904

Groundwater Recharge Structures Dr. P. T. Hanamgond GSS College, Belgaum.

All About Irrigation. Definition Irrigation is the application of controlled amounts of water to plants at needed intervals. Irrigation helps to grow.

IN THE NAME OF ALLAH, THE COMPASSIONATE, THE MERCIFUL

Title Notes: Soil Degradation

UNIT IV Irrigation Methods

Topic 5.3: Soil degradation and conservation

Methods of Irrigation Dr. Sailesh Prajapati.

Soil Agriculture Tillage

Presentation transcript:

Lecture 34 Leaching requirements - irrigation and drainage water quality recycling of drainage water for irrigation

Extensive areas of land in the arid and semi arid regions of India have gone out of cultivation due to the rise of water table and accumulation of salt. Excessive irrigation and poor water management are the chief causes of water logging and salt build-up. An accumulation of salts in soils leads to unfavorable soil-water- air relationships and decreases crop production. Gradually, the land goes out of cultivation, unless remedial measures are under taken.

LEACHING Leaching is the process of removal of soluble material by the passage of water through soil. LEACHING REQUIREMENT It is the minimum amount of irrigation water that must be drained through the crop root zone to control the soil salinity at the given specific level.

LEACHING METHODS By ponding an appreciable depth of water on the soil surface by means of dikes or ridges Rectangular checks and level borders are used when the land is flat. Contour checks can be used when the land slope is considerable. The effectiveness of leaching by furrows is limited. Sprinkling is an effective method for leaching, especially when soils are cracked or are highly permeable. Intermittent ponding is superior to continuous ponding for effective leaching.

The efficiency of leaching depends on 1.The amount of water applied, 2.Uniformity of water distribution, and 3.The adequacy of drainage

For surface irrigation method including sprinkler Where, ECw = Electrical conductivity of the irrigation water, dS/m ECe = Electrical conductivity of the soil saturation extract for a given crop proportional to the tolerable degree of yield loss

For drip irrigation method Where, ECw = Electrical conductivity of the irrigation water, dS/m Max.ECe =Maximum tolerable Electrical conductivity of the soil saturation extract for a given crop

Salinity management techniques 1.Frequent irrigation 2.Crop selection 3.Preplanting irrigation 4.Higher Seed rate 5.Blending with good quality irrigation water 6.Irrigation rotation with good and poor water 7.Land grading 8.Deep ploughing and subsoiling 9.Drainage 10.Rain water management

Drainage water use 1.Used for irrigation by mixing with canal water 2.Dispose off the water by gravity/ by lift irrigation 3.Evaporation tanks 4.Bio-drainage 5.Brackish water fish culture

HE WHO PROVIDES WATER DESERVES TWO NOBEL PRIZES ONE FOR PEACE AND THE OTHER FOR SCIENCE - John F. Kennedy -

LET US WORK TOGETHER TO MANAGE AVAILABLE WATER

Water is precious… conserve it…