Alternative Biomass from Saline and Semiarid and Arid Conditions as a Source of Biofuels: Salicornia

2018 ◽  
pp. 229-240 ◽  
Author(s):  
Ashwani Kumar ◽  
Ebin Abraham ◽  
Arti Gupta
Keyword(s):  
Arid Conditions

Characterizing the convective heat exchange with plastic shading nets under natural arid conditions

2019 ◽  
pp. 11-20
Author(s):  
Ahmed M Abdel-Ghanya ◽  
Ibrahim M Al-Helal
Keyword(s):  
Wind Speed ◽  
Thermal Radiation ◽  
Convective Heat ◽  
Convective Heat Transfer Coefficient ◽  
Convective Heat Exchange ◽  
Radiative Properties ◽  
Wooden Frame ◽  
Arid Conditions ◽  
Air Temperatures ◽  
Radiation Fluxes

Plastic nets are extensively used for shading purposes in arid regions such as in the Arabian Peninsula. Quantifying the convection exchange with shading net and understanding the mechanisms (free, mixed and forced) of convection are essential for analyzing energy exchange with shading nets. Unlike solar and thermal radiation, the convective energy, convective heat transfer coefficient and the nature of convection have never been theoretically estimated or experimentally measured for plastic nets under arid conditions. In this study, the convected heat exchanges with different plastic nets were quantified based on an energy balance applied to the nets under outdoor natural conditions. Therefore, each net was tacked onto a wooden frame, fixed horizontally at 1.5-m height over the floor. The downward and upward solar and thermal radiation fluxes were measured below and above each net on sunny days; also the wind speed over the net, and the net and air temperatures were measured, simultaneously. Nets with different porosities, colors and texture structures were used for the study. The short and long wave’s radiative properties of the nets were pre-determined in previous studies to be used. Re and Gr numbers were determined and used to characterize the convection mechanism over each net. The results showed that forced and mixed convection are the dominant modes existing over the nets during most of the day and night times. The nature of convection over nets depends mainly on the wind speed, net-air temperature difference and texture shape of the net rather than its color and its porosity.

Screening of wheat germplasm for terminal heat tolerance under hyper-arid conditions

2021 ◽  
Author(s):  
Vishnu Prakash Agarwal ◽  
Narendra Kumar Gupta ◽  
Sunita Gupta ◽  
Govind Singh
Keyword(s):  
Heat Tolerance ◽  
Wheat Germplasm ◽  
Arid Conditions

scholarly journals Effects of Rootstocks on Blade Nutritional Content of Two Minority Grapevine Varieties Cultivated under Hyper-Arid Conditions in Northern Chile

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 327
Author(s):  
Nicolás Verdugo-Vásquez ◽  
Gastón Gutiérrez-Gamboa ◽  
Emilio Villalobos-Soublett ◽  
Andrés Zurita-Silva
Keyword(s):  
Climatic Conditions ◽  
Soil Conditions ◽  
Northern Chile ◽  
High Tolerance ◽  
Nutritional Content ◽  
Pests And Diseases ◽  
Arid Conditions ◽  
High K ◽  
Warm Weather ◽  
Nutritional Imbalance

In the 90s, as in other countries, transformation of Chilean viticulture brought about the introduction and spread of European grapevine varieties which has resulted in a massive loss of minor local and autochthonous grapevine varieties traditionally grown in several wine growing regions. Fortunately, in recent years, autochthonous and minority varieties have been revalued due to their high tolerance to pests and diseases and because of their adaptation to thermal and water stress triggered by global warming. In this study, we assessed the nutritional status of two autochthonous grapevines grafted onto four different rootstocks under the hyper-arid climatic conditions of Northern Chile over three consecutive seasons. The results showed that R32 rootstock induced high N, P, Ca, Mg and Mn levels in blades compared to Harmony rootstock. R32 rootstock and to a lesser extent, 1103 Paulsen and 140 Ruggeri rootstocks kept balanced levels of nutrients in blades collected from Moscatel Amarilla and Moscatel Negra grapevine varieties. Additionally, Harmony presented slight nutritional imbalance compared to the rest of studied rootstocks due to its low absorption of Mg, Mn, Ca and P, and its high K absorption, which was exacerbated under warm weather and salinity soil conditions. These results may provide a basis for specific cultivar/rootstock/site combinations, a nutritional guide for the viticulturists of Northern Chile, and options to diversify their production favoring the use of minority and autochthonous varieties that adapt well to hyper-arid conditions of Northern Chile.

Continuous Cropping, Fertilization, and Organic Manure Application Effects on Potassium in an Alfisol under Arid Conditions

2010 ◽  
Vol 41 (6) ◽  
pp. 783-796 ◽  
Author(s):  
Ch. Srinivasarao ◽  
K. P. R. Vittal ◽  
Sumanta Kundu ◽  
P. N. Gajbhiye ◽  
M. Vijayasankar Babu
Keyword(s):  
Organic Manure ◽  
Continuous Cropping ◽  
Manure Application ◽  
Arid Conditions

scholarly journals Milk production and its relationship with milk composition, body and udder morphological traits in Bedouin goat reared under arid conditions

2018 ◽  
Vol 41 (1) ◽  
pp. 42552
Author(s):  
Fatima Kouri ◽  
Salima Charallah ◽  
Amina Kouri ◽  
Zaina Amirat ◽  
Farida Khammar
Keyword(s):  
Body Weight ◽  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Morphological Traits ◽  
Growth Traits ◽  
Average Daily Gain ◽  
Arid Conditions ◽  
Daily Milk Yield ◽  
Daily Milk

 This research aims to assess the performances of lactating Bedouin goat under arid conditions, focusing on the relationship of milk yield with body and udder morphology and growth traits. Fourteen goats and their kids were followed during early lactation (90 days post-partum). Mean daily milk yield was 0.56 kg. Milk fat, proteins, lactose, solids non-fat and minerals were respectively 34.9, 38.9, 48.8, 107 and 6.7 g L-1. Mean kids’ birth weight, adjusted body weight at 90 days of age and average daily gain were respectively 2 kg, 6.6 kg and 51.4 g day-1. Daily milk yield was correlated with goats’ body weight, withers height, rump height, udder width and udder circumference but not with linear udder score and growth performances. These results provide important data about the milk production of Bedouin goat emphasizing its correlation with body and udder morphological traits which can help to elaborate a specific breeding program for this breed. 

P280 reduced erythromycin release and bioavailability from film tablets stored under arid conditions

1994 ◽  
Vol 2 (1-2) ◽  
pp. 188
Author(s):  
M. Gerhartz ◽  
A.F. Rump ◽  
R. Süverkrüp ◽  
M. Theison
Keyword(s):  
Arid Conditions

Drip irrigation management for wheat under clay soil in arid conditions

2018 ◽  
Vol 121 ◽  
pp. 35-43 ◽  
Author(s):  
Harby Mostafa ◽  
Reham El-Nady ◽  
Montaser Awad ◽  
Mohamed El-Ansary
Keyword(s):  
Drip Irrigation ◽  
Clay Soil ◽  
Irrigation Management ◽  
Arid Conditions

Triazine carryover in semi-arid conditions

1990 ◽  
Vol 9 (6) ◽  
pp. 429-432 ◽  
Author(s):  
O.A. Chivinge ◽  
B. Mpofu
Keyword(s):  
Arid Conditions ◽  
Semi Arid

Genetic parameters of Barki sheep raised under semi-arid conditions

1969 ◽  
Vol 11 (3) ◽  
pp. 361-367 ◽  
Author(s):  
M. H. Fahmy ◽  
E. Salah E. Galal ◽  
Y. S. Ghanem ◽  
S. S. Khishin
Keyword(s):  
Genetic Parameters ◽  
Genetic Correlations ◽  
Research Station ◽  
Phenotypic Correlations ◽  
Arid Conditions ◽  
Body Weights ◽  
Genetic And Phenotypic Correlations ◽  
Fleece Weight ◽  
Semi Arid ◽  
Desert Research

SUMMARYRecords on 695 lambs were collected over a period of 5 years from 1961/62 to 1965/66, at Ras El-Hekma Desert Research Station, 230 km west of Alexandria. The characters studied were birth, weaning and yearling body weights, pre- and post-weaning daily gains and greasy fleece weight.Birth, 120-day and 365-day body weights were 3·4, 18·2 and 33·4 kg respectively. Greasy fleece weight at 16 months of age was 3·29 kg. Heritability estimates of birth, weaning, yearling weights, pre- and post-weaning daily gains and greasy fleece weight were 0·22, 0·45, 0·41,0·45 and 0·29 respectively. Genetic and phenotypic correlations between birth, weaning and yearling weights were all positive and significant. Genetic correlations between fleece weight and body characteristics were negative and low.

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