Yield and processing attributes of exotic potato varieties for processing under the arid conditions of Northern Sudan
An experiment was carried out to evaluate six potato varieties for processing against one check for yield, stability and processing quality traits at three locations (Khartoum, Dongola and Merowe). Experiments were conducted during the winter seasons of 2014/15 and 2015/16. Potato varieties (Markies, Taurus, Triplo, Santana, Ramos and Destiny) with Safari as control were received from Netherlands by the National Potato Technical Committee, Sudan. Experiments were arranged in a randomized complete block design and a completely randomized design for storage and processing parameters. Three varieties were found to be high yielding Triplo, Markies and Santana. Triplo produced the highest marketable yield for processing followed by Markies and Santana. Moreover, the three varieties had the high tuber weight and showed stable performance. However, Density had the highest dry matter content (23.3%) and Safari showed the lowest dry matter content (18.6%).Whereas, reducing sugars ranged from 0.41% in check variety (Safari) to 0.013% in Density. The highest yielding varieties (Triplo, Markies, and Santana) resulted in the highest chipping yield compared to the check (Safari). Varieties Santana, Taurus, Triplo and Markies showed the least weight loss percentage during six months storage period at 7 ºC, while Ramos had the highest weight loss percentage.
Key words: processing parameters, potato varieties, storage
STUDY ON PHYSICO-CHEMICAL PARAMETERS AND PLANKTON COMPOSITION IN RAIN-FED WATER BODIES, HAMJAKHERI AND PADLIA RESERVOIR OF DISTRICT PRATAPGARH, RAJASTHAN
Abstract The aim of the study was to determine the Physico-chemical status of two reservoirs, Hamjakheri and Padlia of tribal district Pratapgarh of southern region of state Rajasthan for development of fish farming. Water and soil sample collected from May 2006 to April 2007 seasonal interval from preselected raid-fed water bodies. The important attributes of soil and water qualities such as air temperature (Hamjakheri 31.°C, Padlia 31.5°C), water temperature(Hamjakheri 26°C,Padlia 23.6 °C),transparency (Hamjakheri 61.7cm, Padlia38.7 cm), pH (Hamjakheri 7.5, Padlia 7.2), conductivity(Hamjakheri 256µmhos/cm, Padlia 271 µmhos/cm), dissolve oxygen (Hamjakheri 6.72 mg/l, Padlia 5.8 mg/l),total alkalinity (Hamjakheri 86ppm, Padlia 90 ppm), TDS (Hamjakheri 237 ppm, Padlia 303 ppm), hardness (Hamjakheri 73 ppm Padlia 82 ppm ),phosphate (Hamjakheri 0.02 ppm, Padlia 0.01 ppm), silicate(Hamjakheri 1.8 ppm, Padlia 1.4 ppm) were observed. The water spread area of Hamjakheri is 627.09 ha, and mean depth 1.8 meter and Padlia 210 ha and mean depth 1.5 meter. A comparative study of physicochemical parameters of soil and water and plankton composition indicates that Hamjakheri reservoir has more fisheries potential than Padlia reservoir. The result revealed that aquatic environment of Hamjakheri reservoir is conducive not only for fish farming purpose but also for irrigation. Keywords-Hamjakheri, Padlia, Fish farming, Physico-chemical, Plankton, Rajasthan.