Irrigation application Evapotranspiration estimation Nutrient management
2.3. Irrigation application
Irrigation volume was determined every 4 d based on the difference between estimated ET p and measured effective rainfall. Penman-Monteith’s formula, multiplying crop coefficients from FAO-56 Allen et al., 1998, was used to estimate ET p . Weather data were collected from an automatic weather station, 20 m away from the field site.2.4. Evapotranspiration estimation
Actual crop evapotranspiration was estimated using the following water balance equation: c ET W I P R D ∆ 1 where ∆W is the change of soil water storage mm, I is irrigation amount mm, P is precipitation mm, R is surface runoff mm, and D is the deep percolation mm. The calculation soil layer was set at 0–100 cm. The ∆W was estimated using the change in soil water content in the soil profile. Surface runoff was ignored, and D was considered as the volume of water drained from the lysimeters.2.5. Nutrient management
Organic fertilizer chicken manure: 11.1 m 3 ha was uniformly applied in all plots as basal fertilizer before land leveling. During the growth season, urea dissolved in irrigation water in a fertilizer tank was applied according to nitrogen fertilization application levels of the different treatments. In 2007, nitrogen application was applied at 23 Jul, 16 Aug, 9 Sep for three different growth stages. But in 2008, nitrogen was applied only two times at 31 Jul, 3 Sep. Before and after fertilization, soil samples were collected from 0–20, 20–40, 40–60, 60–80 and 80–100 cm soil layers and at 0, 25 and 50 cm distance from the lateral pipes. Soil samples were then pulverized and sifted out using a 2 mm sieve, soil 10 g was weighed with an electronic balance, and 50 ml KCl solution 1 molL was added to the soil through a pipette. The samples were then shook for 1 h on a shaker, and filtrated through a 0.45 μm membrane after clarification. NO 3 - -N content in the soil leach liquor was calculated assuming that all NO 3 - -N was dissolved in water. After leaching, dissolved NH 4 + -N and NO 3 - -N were determined directly by flow injection analysis SAN ++ 5000.2.6. Yield
Parts
» Beliefs and Achievements of NITP
» Scope for non conventional irrigation schemes Problems in Micro Irrigation Development in Nepal
» Conclusion Project Area, Priority, Budget and Present Status
» INTRODUCTION Project Area, Priority, Budget and Present Status
» CONCLUSIONS REFERENCES Water u
» MATERIALS AND METHODS RESULTS
» EggplantBrinjal 1. Surface subsurface drip and yield
» Lettuce Pasture Irrigation micro irrigation tehran
» For Vegetables Tomatoes Brinjal
» High density orchards Drip irrigation in Sloping Lands Shallow water tables Partial Wetting
» Deficit Irrigation Crop water stress Daily night time spray irrigation
» Economics REVIEW OF STUDIES ON TOMATOES
» NFERENCES FROM REVIEW ON TOMATOES
» REVIEW OF STUDES F MULCHING ON CHILIS
» Jain, V.K., Shukla, K.N., and Singh, P.K. 2001 ‘Response of potato under drip 168-176.
» Introduction REVIEW OF STUDIES OF MULCHING ON MelonsWatermelons
» Site description micro irrigation tehran
» Irrigation application Evapotranspiration estimation Nutrient management
» Yield Water application micro irrigation tehran
» Seasonal patterns of soil moisture
» Conclusions Yield and water use efficiency
» INTRODUCTION Yield and water use efficiency
» Soil water potential changes during the growing season
» CONCLUSION Effects at the fruit maturation stage
» CLIMATOLOGY DAM PROPERTIES IRRIGATION SYSTEM Alternative A
» Project Location Development Plan
» SUMMARY AND CONCLUSIONS REFERENCES
» INTRODUCTION Description of Alternative Plans
» MATERIAN AND METHODS Description of Alternative Plans
» RESULS AND DISCUSSION Description of Alternative Plans
» Conclusions References Description of Alternative Plans
» Quality parameters Table 4 micro irrigation tehran
» INTRODUCTION and 35.8 per cent higher over control in both the crops.
» Experimental site micro irrigation tehran
» Energy balance theory at soil surface Meteorological parameters
» Energy balance measurements 24.10 78.16 2.90 42 micro irrigation tehran
» Conclusion and recommendations Diurnal energy balance pattern for a sample day
» 5.0 1 Diurnal energy balance pattern for a sample day
» MATERIAL AND METHODS Diurnal energy balance pattern for a sample day
» 34.45 13.06 38.43 45.07 Hamedan micro irrigation tehran
» Kerman Khorasan Razavi micro irrigation tehran
» DISCUSSION Provinces technical results combined
» INTRODUCTION HOW TO INTRODUCE THE PLANT, SOIL AND CONSUMED WATER PROPERTIES DATA WITH SOFTWARE
» INTERING FARM PICTURE INTO THE DRAWING SCREEN HOW TO INTRODUCE FARM TOPOGRAPHY TO THE SOFTWARE
» DRAWING NETWORK LAYOUT Provinces technical results combined
» CONCLUSION AND RECOMMENDATIONS File menu
» output data Nutrient management
» Tamaab. 2004. Tamaab Database. Water Research Center. Iran. Introduction
» 78.6 90.7 The experimental site The experimental layout
» Moisture and salinity monitoring in the soil Water application
» Moisture distribution in the soil Salinity distribution in the soil Yield
» CONCLUSION REFERENCES Pistachio water productivity
» INTRODUCTION Pistachio water productivity
» MATERIALS AND METHODS Pistachio water productivity
» Coefficient of Variation micro irrigation tehran
» CONCLUSIONS References Pressure-Discharge Relationship
» Variation of Discharge Uniformity with Pressure Design and layout of drip fertigation system
» Water consumption under drip system in Muscat grapes
» Fertilizer use efficiency FUE
» Drip irrigation scheduling Total Soluble solids, Total sugar and Acidity Shot berries per cent
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