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Ramulu, V.
- Comparison of Tank Silt and Farm Yard Manures in Relation to Soil Water Retention Capacity and Soil Fertility in Redgram in Alfisol of NSP Left Canal Command Area
Authors
1 Acharya N.G. Ranga Agricultural University, A.P Water Management Project, Agricultural Research Station, Garikapadu, KRISHNA (A.P.), IN
Source
International Journal of Agricultural Sciences, Vol 11, No 2 (2015), Pagination: 346-349Abstract
On farm field experiment on effect of soil amendments in relation to soil water retention capacity and soil fertility in redgram were taken up in Alfisols of NSP left canal command area during Kharif 2006 and Kharif 2007 at pilot area Ganapavaram of Nagarjuna Sagar Project left canal command under A.P. water management project funded by FAO. The trial was carried with the farmers participatory mode to study the impact of application of tank silt and farm yard manure as soil amendments in relation to soil water retention capacity and soil fertility and on crop yield of redgram. The five treatments consisted of 5t FYM/ha, 10t FYM/ ha, 20t tank silt/ha, 30t tank silt/ha and RDF. Application of 20 t of tank silt + RDF and 30 t of tank silt + RDF application recorded highest grain yield of 2290 kg ha-1 and 2180 kg ha-1 during Kharif, 2006 and 20 t of tank silt + RDF recorded highest grain yield of 2280 kg/ha followed by application of 30 t of tank silt+ RDF (2130 kg/ha) and application of 10 t of FYM+ RDF (2040 kg/ha) during Kharif, 2007, respectively. Post harvest soil analysis revealed that the organic carbon content was high in 10 t FYM + RDF where as the application of increased tank silt recorded increase in water holding capacity during the both the years.Keywords
Soil Amendments, Soil Fertility, Redgram, Canal Command.
- Vertical Distribution of Available Macro and Micronutrients in Soil Profiles of Ganapavaram Pilot Area of Nagarjuna Sagar Left Canal Command Area of Andhra Pradesh
Authors
1 Agricultural Research Station (ANGRAU), Garikapadu, Krishna (A.P.), IN
Source
An Asian Journal of Soil Science, Vol 11, No 1 (2016), Pagination: 202-206Abstract
Studies undertaken to assess the nutrient status of soils of pilot area Ganapavaram of 24 L Minor and Muktheswara Puram Major of Nagarjuna Sagar Project left canal command of Nalgonda district of Andhra Pradesh have been studied. Profile wise nutrient status in soil profiles of pilot area revealed that the soils were low to medium in available nitrogen (94 - 219 kg ha-1), low to high in available phosphorus (4.4 to 45.5 kg ha-1) and low to high in available potassium (98 to 482 kg ha-1). The DTPA extractable available micronutrients Zn, Cu, Mn and Fe ranged from 0. 24 to 2.52 mg kg-1, 1.20 to 4.59 mg kg-1, 1.18 to 15.65 mg kg-1 and 1.67 to 49.1 mg kg-1 soil, respectively. Soils were low to medium in available nitrogen, high in available phosphorus and medium to high available potassium in the surface horizons and in case of available micronutrients deficient to sufficient in Zn and sufficient in available Cu, Fe and Mn in the surface layers of the soil profiles.Keywords
Available N, P, K, Available Micronutrients.References
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- Estimation of Agricultural Blue and Green Water Use in Upper Manair Catchment, Andhra Pradesh
Authors
Source
International Journal of Innovative Research and Development, Vol 3, No 1 (2014), Pagination:Abstract
An accurate assessment of agricultural blue and green water use is a key to estimate agricultural water demand and to understand human’s interference with the ecosystems. Ground water is the primary source for irrigation in Upper Manair catchment, Andhra Pradesh. Due to continuous over-pumping, groundwater resources have been greatly depleted. It is extremely important for a sustainable agricultural water management to explicitly estimate the groundwater consumption for agriculture. Crop water requirements (CWR) of various crops in a catchment are computed using CROPWAT software. The seasonal ETc values for rabi crops were 430 mm, 365 mm and 222.5 mm for paddy, sunflower and maize, respectively, and for kharif crops were 525 mm, 261 mm, 1041 mm and 535 mm for paddy, maize, sugar cane and cotton respectively. However, the amount of ground water applied (MCM) for rice (Kharif), cotton, sugarcane, sunflower, double crop rice and double crop maize are 340.11, 57.94, 114.29, 18.0, 186.75 and 175.43 respectively. The total amount of ground water applied for different agricultural crops is 421.92 MCM more than the required amount of water which leads to depletion of ground water. Hence, immediate measures are required to reduce the blue and green water loss by developing efficient irrigation practices for sustainable ground water resources.
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- Water Productivity of Agricultural Crops in Upper Manair Catchment
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International Journal of Innovative Research and Development, Vol 3, No 1 (2014), Pagination:Abstract
Water use in agriculture is highest among other water users and economically far less efficient. The production per unit water consumed, the water productivity, must be increased to increase its economical efficiency. Knowledge about water resources availability and crop water productivity with high spatial and temporal resolution is necessary for water productivity improvement analyses. Therefore, the study has been taken up to characterize the hydrologic processes of the Upper Manair catchment and assess crop water productivity using Soil and Water assessment tool (SWAT) to evolve irrigation management plans to sustain the use of groundwater resources for irrigation. The biological and economical yield of different field crops, viz. Rice, Maize, Cotton, Sugarcane and sunflower were predicted successfully. Water productivity for Rice, Maize, Cotton, Sugarcane and sunflower were estimated at 0.61, 1.27, 0.41, 8.04 and 1.05 kg /m3, respectively, which were significantly lower than the potential. SWAT model predicts crop yield, biomass and water productivity temporally and spatially which will help to finalize the management practices to sustain ground water resources. In addition to adopting water saving technologies, reliable quality and hours of supply of power is extremely important for achieving higher water productivity in ground water irrigation.
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- Simulation of Impact of Change in Landuse on Water Yield of Upper Manair Catchment
Authors
Source
International Journal of Innovative Research and Development, Vol 3, No 1 (2014), Pagination:Abstract
Land use plays an important role in controlling hydrologic response of catchment, particularly in terms of the nature and magnitude of surface water and ground water interactions and surface water availability. The change in land use controls the water yield of surface streams and groundwater aquifers and thus the amount of water available in a watershed. Hence, the hydrological model SWAT has been applied to upper Manair catchment, Andhra Pradesh, India to determine the impact of land management practices and change in land use on water yield for sustainable use. The model was run for a period of 21 years, i.e.1992 to 2012. It was calibrated against observed reservoir volumes using Nash Sutcliffe criteria (0.85). To obtain sustainability of ground water resources in the watershed, it was tried to simulate the water balance components by reducing the area under paddy cultivation through three alternate cropping scenarios. The evaluation of three scenarios clearly demonstrated the impact of conversion of paddy (water intensive crop) on the hydrology of watershed. The base flow was reduced from 31.42mm to 6.21mm. The lateral flow through soil has decreased to 3.05mm from 3.92mm. The deep aquifer recharge has been reduced to 356.79mm from 464.51mm. Actual ET has been increased to 592.8 from 545.1mm due to more vegetation. It can be concluded that converting paddy area to dry land crops will enhance availability of surface water resources and decrease ground water resources.
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- Effect of Soil Amendments in Relation to Soil Water Retention Capacity and Soil Fertility in Maize in Alfisol of NSP Left Canal Command Area
Authors
1 Acharya N.G. Ranga University, A.P. Water Management Project, A.R.S. Garikapadu, Krishna (A.P.), IN