This project investigated the potential for a boron-specific ion exchange resin to remove boron f... more This project investigated the potential for a boron-specific ion exchange resin to remove boron from agricultural drain water. Water for processing was collected from an agricultural drain on the west side of the San Joaquin valley of California. The process water was ...
Currently, 98% of domestic commercial pomegranate fruit (Punica granatum L.) are produced in Cali... more Currently, 98% of domestic commercial pomegranate fruit (Punica granatum L.) are produced in California on over 13,000 ha. Developing more efficient methods of water and fertilizer application are important in reducing production costs. In 2012, a pomegranate orchard established in 2011 with a density of 558 trees/ha, was supplied nitrogen as N-pHURIC (urea-sulphuric acid, 10% N) and AN-20 (ammonium nitrate, 20% N) at rates of 52, 166, and 279 kg N/ha delivered by surface (DI) and subsurface drip irrigation (SDI) (at 61 cm depth). Water replacement was based on rainfall, tree water removal, and soil surface water loss as measured by weather station ETo and a weighing lysimeter. An additional 10% more water was applied by the DI system to compensate for efficiency differences between the two water delivery methods. A fresh market (FM) harvest was made on Oct. 30 and a juice market (JM) harvest was then made on Nov. 8 to remove remaining fruits. Total season yields (FM+JM) and average...
In situ use of ground water by plants is one optionbeing considered to reduce discharge of subsur... more In situ use of ground water by plants is one optionbeing considered to reduce discharge of subsurfacedrainage water from irrigated agriculture. Laboratory, lysimeter, and field studies havedemonstrated that crops can use significant quantitiesof water from shallow ground water. However, moststudies lack the data needed to include the crop wateruse into an integrated irrigation and drainage watermanagement system. This paper describes
In Uzbekistan, generally practiced methods of irrigating crops are varieties of flooding (basin, ... more In Uzbekistan, generally practiced methods of irrigating crops are varieties of flooding (basin, border and furrow). These practices have created problems of waterlogging, salinity and lower irrigation efficiency. Waterlogging and salinization already affect 50 percent of irrigated areas, and irrigation efficiency hardly reaches up to 50-60%. The Karshi Steppe of Kashkadarya region is among the prime cotton and wheat producing areas in Uzbekistan, using around 4.5 – 5.0 billion m3 of irrigation water within a hydrological year. About 75% of this water is abstracted from Amu Darya River in the territory of Turkmenistan and raised up to 135 meters, using a cascade of seven pumping stations to Karshi main canal. Research on implications of applying other irrigation technologies with different irrigation regimes on cotton crop are limited in Uzbekistan, especially under water scarce situations, such as in Karshi Steppe. This study targeted that knowledge gap and compared performance of cotton crop under different irrigation regimes with three technologies (furrows, gated pipes, and drip). The yield data ranged from 3.5 to 4.6 t ha-1, whereas water productivity (WP) values ranged from 0.44 to 1.20 kg m-3 and irrigation water use efficiency (IWUE) ranged from 0.51 to 1.41 kg m-3. The measured ranges of IWUE and WP are much wider compared with data available for Karshi Steppe. Due to cotton being sensitive to soil-moisture stress, lack of skillful technicians at site for irrigation scheduling has led to more water stress than was planned for, resulting in lower crop yields than expected
... Study of effects of economical factors on water use Efficiency in irrigated cereals under far... more ... Study of effects of economical factors on water use Efficiency in irrigated cereals under farmers Condition in areas of lower KRB in Khuzestan province. by Asadi, Hormoz; A`bbasi, A`li Reza; Seyyedi Niyasar, Mas`ud; Heydari, Nader; A`bbasi, Fariborz; Mo`ayyeri, ... ...
This project investigated the potential for a boron-specific ion exchange resin to remove boron f... more This project investigated the potential for a boron-specific ion exchange resin to remove boron from agricultural drain water. Water for processing was collected from an agricultural drain on the west side of the San Joaquin valley of California. The process water was ...
Currently, 98% of domestic commercial pomegranate fruit (Punica granatum L.) are produced in Cali... more Currently, 98% of domestic commercial pomegranate fruit (Punica granatum L.) are produced in California on over 13,000 ha. Developing more efficient methods of water and fertilizer application are important in reducing production costs. In 2012, a pomegranate orchard established in 2011 with a density of 558 trees/ha, was supplied nitrogen as N-pHURIC (urea-sulphuric acid, 10% N) and AN-20 (ammonium nitrate, 20% N) at rates of 52, 166, and 279 kg N/ha delivered by surface (DI) and subsurface drip irrigation (SDI) (at 61 cm depth). Water replacement was based on rainfall, tree water removal, and soil surface water loss as measured by weather station ETo and a weighing lysimeter. An additional 10% more water was applied by the DI system to compensate for efficiency differences between the two water delivery methods. A fresh market (FM) harvest was made on Oct. 30 and a juice market (JM) harvest was then made on Nov. 8 to remove remaining fruits. Total season yields (FM+JM) and average...
In situ use of ground water by plants is one optionbeing considered to reduce discharge of subsur... more In situ use of ground water by plants is one optionbeing considered to reduce discharge of subsurfacedrainage water from irrigated agriculture. Laboratory, lysimeter, and field studies havedemonstrated that crops can use significant quantitiesof water from shallow ground water. However, moststudies lack the data needed to include the crop wateruse into an integrated irrigation and drainage watermanagement system. This paper describes
In Uzbekistan, generally practiced methods of irrigating crops are varieties of flooding (basin, ... more In Uzbekistan, generally practiced methods of irrigating crops are varieties of flooding (basin, border and furrow). These practices have created problems of waterlogging, salinity and lower irrigation efficiency. Waterlogging and salinization already affect 50 percent of irrigated areas, and irrigation efficiency hardly reaches up to 50-60%. The Karshi Steppe of Kashkadarya region is among the prime cotton and wheat producing areas in Uzbekistan, using around 4.5 – 5.0 billion m3 of irrigation water within a hydrological year. About 75% of this water is abstracted from Amu Darya River in the territory of Turkmenistan and raised up to 135 meters, using a cascade of seven pumping stations to Karshi main canal. Research on implications of applying other irrigation technologies with different irrigation regimes on cotton crop are limited in Uzbekistan, especially under water scarce situations, such as in Karshi Steppe. This study targeted that knowledge gap and compared performance of cotton crop under different irrigation regimes with three technologies (furrows, gated pipes, and drip). The yield data ranged from 3.5 to 4.6 t ha-1, whereas water productivity (WP) values ranged from 0.44 to 1.20 kg m-3 and irrigation water use efficiency (IWUE) ranged from 0.51 to 1.41 kg m-3. The measured ranges of IWUE and WP are much wider compared with data available for Karshi Steppe. Due to cotton being sensitive to soil-moisture stress, lack of skillful technicians at site for irrigation scheduling has led to more water stress than was planned for, resulting in lower crop yields than expected
... Study of effects of economical factors on water use Efficiency in irrigated cereals under far... more ... Study of effects of economical factors on water use Efficiency in irrigated cereals under farmers Condition in areas of lower KRB in Khuzestan province. by Asadi, Hormoz; A`bbasi, A`li Reza; Seyyedi Niyasar, Mas`ud; Heydari, Nader; A`bbasi, Fariborz; Mo`ayyeri, ... ...
Uploads
Papers