on test application of cropwat software under field conditions of semi-arid region, maharashtra
DESCRIPTION
Seminar Session 6TRANSCRIPT
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TECHNICAL SESSION ONAGRICULTURE WATER USE
ON TEST APPLICATION OF CROPWAT SOFTWARE UNDER FIELD CONDITIONS OF SEMI-ARID REGION, MAHARASHTRA
PRADNYA GHAGWATERSHED ORGANISATION TRUST, PUNE
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INTRODUCTION
• What is CropWAT???
• Objectives behind this study…
• Study Area
• Weather conditions for the year 2011-12
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1. To test CropWAT application for developing a model case for the development of irrigation advisories at farm level.
2. To check the accuracy of this software for the use on field level.
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EXPERIMENTAL DESIGN
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•Seed Treatment:Seedlings dipped into fungicide
•Fertilizer Application: According to soil test reports
•Onion Variety: Locally available (Puna Fursungi)
•Weeding and Land preparation by Farmer’s method
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CALCULATIONS
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IRRIGATION SCHEDULE FOR
RABI ONION
(Drip Plots)
(Flood Plots)
306mm
429 mm
Readily Available Moisture
Total Available Moisture
Drip – 620 mmFlood – 660 mm
Software Calculations
Farmer’s Calculation
70%
50%
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Soil stress shown in Tensiometers
STUDY FINDINGS
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CHALLENGES
• A full real time data set of climate (rain, temperature, etc), soil and crop data is required to run the software in order to make calculations.– Averages Vs Weather variations
• Software itself does not allow for automated import of data.
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CHALLENGES (Contd...)
• Multiple constraints emerging from the circumstances under which farmers operate.– Financial– Physical
• The water availability over the season and for each farm is often unknown and makes it difficult to follow given irrigation advisories.
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Sense – Categorize – Respond
Sense – Analyze – Respond Probe – Sense – Respond
Act – Sense – Respond
Best Practice
Good PracticeEmergent Practice
Novel Practice
the relationship between causeand effect is empirically known
the relationship between causeand effect requires analysis or some other form of
investigation and/or the application of expertknowledge
the relationship between causeand effect can only be perceived in
retrospect
no relationship between causeand effect at system level
CropWATAGRICULTURESYSTEM
CONCLUSION
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Recommendations• Moving from Measuring to Sensing...– Farmers should learn to sense by themselves crop water
requirements and plan irrigation schedules accordingly
• Moving from Indicators to Indications...– Estimating soil moisture by feel and appearance method– One of the method to estimate the soil moisture with low
cost tools is the “Ribbon Method”
• Set of diverse experiments...– Multiple small Probes – Sensing - Responses
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