Estimation of Water Requirements and Crop Coefficients for Date Palm in Qassim Region , Saudi Arabia

2016 ◽  
Vol 9 (2) ◽  
pp. 187-196
Author(s):  
Abdulaziz Alharbi ◽  
Ahmad Alzoheiry ◽  
Yousry M. Ghazaw
Author(s):  
Abdulrasoul Al-Omran ◽  
Fahad Alshammari ◽  
Samir Eid ◽  
Mahmoud Nadeem

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 416
Author(s):  
Barbara Jagosz ◽  
Stanisław Rolbiecki ◽  
Roman Rolbiecki ◽  
Ariel Łangowski ◽  
Hicran A. Sadan ◽  
...  

Climate warming increases the water needs of plants. The aim of this study was to estimate the water needs of grapevines in central Poland. Water needs were calculated using the crop coefficients method. Reference evapotranspiration was assessed by the Blaney–Criddle’s equation, modified for climate conditions in Poland. Crop coefficients were assumed according to the Doorenbos and Pruitt method. Water needs were calculated using the data from four meteorological stations. Rainfall deficit with the probability occurrence of normal years, medium dry years, and very dry years was determined by the Ostromęcki’s method. Water needs of grapevines during the average growing season were estimated at 438 mm. Upward time trend in the water needs both in the period of May–October and June–August was estimated. Temporal variability in the water needs was significant for all of the provinces. These changes were mainly impacted by a significant increasing tendency in mean air temperature and less by precipitation totals that did not show a clear changing tendency. Due to climate change, vineyards will require irrigation in the near future. The use of resource-efficient irrigation requires a precise estimate of the grapevines’ water needs. The study identified the water requirements for grapevines in central Poland.


2011 ◽  
Author(s):  
S. S. Al-Ghamdi ◽  
M. S. Al-Garawi ◽  
M. R. Baig ◽  
M. Al-Sameen ◽  
Ali Al-Hajry ◽  
...  

2017 ◽  
Vol 22 (9) ◽  
pp. 1444 ◽  
Author(s):  
Fahad Jaber Alatawi ◽  
Muhammad Kamran

A comprehensive survey was conducted at different provinces of Saudi Arabia (SA) to investigate predacious prostigmatid mites (Acari: Trombidiformes: Prostigmata) mainly collected from the date palm, Phoenix dactylifera L. (Arecaceae) agro-ecosystem. A total of 41 species belonging to 28 genera in 14 families are recorded in the present study. Out of these, three families, 18 genera and 36 species are new to the mite fauna of SA. The new species, Neobonzia tabukensis sp.nov. (Cunaxidae), Cheletomimus (Philippicheyla) taifensis sp.nov. (Cheyletidae) are described and illustrated. A checklist of predatory prostigmatid mites from SA is given. A key to all terrestrial predatory prostigmatid mites, excluding Parasitegona and Heterostigmatina, reported from SA is provided. Also, a key to world species of the subgenus Philippicheyla Corpuz-Raros of the genus Cheletomimus Oudemans is given.


Zootaxa ◽  
2018 ◽  
Vol 4388 (3) ◽  
pp. 373 ◽  
Author(s):  
FAHAD JABER ALATAWI ◽  
MUHAMMAD KAMRAN ◽  
JAWWAD HASSAN MIRZA

This paper reports on 35 species and 33 genera belonging to 18 families of the order Mesostigmata, collected from different provinces of Saudi Arabia. Among these, eight families, 21 genera and 30 species, mostly collected from date palm agroecosystem, are new to the fauna of Saudi Arabia. Five species reported previously are also recorded in this study. The collection data and distribution of all species recorded in this study as well as those reported previously are given. A comprehensive key to the females of the mesostigmatic mites reported from Saudi Arabia, except the Phytoseioidea, is provided. 


2021 ◽  
Vol 52 (3) ◽  
pp. 763-773
Author(s):  
N. A. Al-Harbi

This study was aimed to investigate weeds kind in palm plantations. Date palm is the most chief economic crop in most countries of the Arabian Peninsula. Many factors, such as the presence of weeds, may cause a huge loss in the production of dates. Despite the severe damage caused by the presence of some weeds in agroecosystems, many weeds have many medicinal and economic uses. A total of 62 species were listed in palm Plantations in Tabuk and Al-Qassim Regions. A total of 51 species were listed in Tabuk Region (The number of unique species in the Tabuk Region reached 32 that not recorded in Al-Qassim Region. Also, 19 species were recorded in both of Tabuk and Al-Qassim Regions). A total of 30 weeds were listed in Al-Qassim Region (The number of unique species in the Al-Qassim Region reached 11 that not recorded in the Tabuk Region. In addition to, 19 species were recorded in both of Tabuk and Al-Qassim Regions). Zygophyllaceae was the most common family, the majority life span was annuals and the most common life form was therophyte in both Tabuk and Al-Qassim Regions. Data management and classification were achieved using PCORD (TWINSPAN and DCA analyses).


Author(s):  

Abstract A new distribution map is provided for Parlatoria blanchardii (Targ.) (Homopt., Coccoidea) (Date-palm Scale). Hosts: Date palm and other palms. Information is given on the geographical distribution in ASIA (excl. USSR), Afghanistan, India, Iraq, Israel, Jordan, Pakistan, Persia, Saudi Arabia, Syria, USSR, AFRICA, Algeria, Chad, Egypt, Libya, Mali (formerly French Sudan), Mauritania, Morocco, Niger, Somalia, Sudan, Tunisia, SOUTH AMERICA, Brazil.


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