Abdel Razzaq M Al Tawaha

21 Questions 74 Answers 0 Followers

Questions related from Abdel Razzaq M Al Tawaha

(QMRAcatch). Looking for partner from South Asia and North Asia as well as from Africa?

I searching for a partner to join us ongoing project about QMRAcatch.The person should have experience on working QMRAcatch. Please send me the CV. The Interuniversity Cooperation Centre Water...

01 April 2024 9,214 4 View

Is there any positive correction between chlorophyll content(a,b and total content) and SPAD value in lettuce leaves???

The question is in another way. What is the relationship between SPAD chlorophyll value and Chlorophyll a, b and total Chl? For example, if the lettuce plant has high SAPD content value that...

11 June 2020 3,271 1 View

Question for SAS with two Factor?

I have experimented with two Factor: Factor A: Two iron sources and Factor B: two seasons with three blocks. When I run the SAS, the interaction not significant, but the combination of the...

19 May 2020 2,750 6 View

Can anyone send a SAS Code for measure Maximum and Minimum average value for some parameters?

I have water temperature data for moring and evening, I need to show the maximum and minimum value by the SAS program. Can anyone inform me of the SAS code for this

29 March 2020 4,315 3 View

Can anyone send a Guidelines to write a systematic review in agriculture topic?

I need Guidelines to write a systematic review in agriculture topic.

25 March 2020 8,195 8 View

How to convert mg/L to mg/kg values in the measurement of plant tissue minerals analysis?

I analyzed the plant tissue minerals such as N,P,K by atomic absorption (AAS). I take 0.25g of dry sample and digested. Then filtered and complete the solution to 100ml. The final reading for N,...

24 February 2020 3,338 8 View

I need protocol for Chlorophyll a and b, Vitamin A and vitamin C for lettuce plant??

30 June 2019 1,902 2 View

Can please any explain the nutrient solution calculation in this table??

I looking for find explain for the concentraion in second table. what I mean for example: the amount used from Ca(NO3)2.4H2O equal 1003 g/1000L. and the concentration for Ca in the second table...

10 June 2019 3,613 4 View

I used Hanna instruments (Multi parameters) and I used for meaurement Nitrate. The readying was more that 30 mg/l. How I can diluted the water sample?

I want to diluted water sample. The sample volume(10 ml), the reading give me out of range( the range 30 mg/l). amount of Nitrate I have more than 30 mg/L. How i can dilute the water sample to get...

05 May 2019 9,376 12 View

Can prepare an HOAGLAND nutrient solution from different sources of nutrients that not listed in original one?

I known that composition of Nutrient solution for Hogland was composed the following composition of Hogland...

05 May 2019 716 8 View

How I can calculate the amount of biofilter materials such bioballs in aquaponics or aquaculture need to put inside the biofilter tank??

If I have 10 kg of fish and produced 7.5 g ammonia per day from waste. And according to the data each in literature each 0.57g of ammonia need 1 square meter of biofilter material such as...

24 December 2018 520 4 View

What is the difference between monitoring and maintenance of water quality in aquaculture???

what is the difference between monitoring and maintenance of water quality such as pH,EC, Salinity and alkalinity in aquaculture and aquaponics.

08 December 2018 9,720 34 View

How much the evaporation percentage/rate in low land and high land in Malaysia under plastic house condition(only with fan) and open filed??

I need to know the evaporation percentage in open filed, hydroponics and aquaponics condition in Malaysia or international range

27 March 2018 3,448 3 View

How to collect lettuce root exudate in hydroponic culture and aquaponics?

25 March 2018 5,518 4 View

How can measurements or calculate of Specific Surface Area for particles m2/m3??

I need to know the protocol for measurements Specific Surface Area laboratory for sugarcane bagasse

20 February 2018 746 2 View

How can apply humic acid to plants in Deep water culture and NFT under hydroponics for leafy crops and fruits??

I want to apply humic acid to leafy crops under hydroponics?? what the way for apply humic acid?

07 February 2018 4,372 6 View

I need to the procedure/way for calculation pH, particle size, density, bulk density, Water Holding Capacity (kg/kg) specific surface area (m2/m3) ??

I need to the procedure/way for calculation pH, particle size, density, bulk density, Water Holding Capacity (kg/kg) specific surface area (m2/m3) and Void fraction (%) for these agriculture by...

13 December 2017 1,555 7 View

What is the efficiency of using Agriculture by products act as biofilter in aquaponics system instead the commercial products?

How much the efficiency of used Agriculture by products act as biofilter such as rice husk and maize stubbles?

25 July 2017 4,322 6 View

How we do activity the bacteria in short time in aquaponics?

I wish to guide about the ways for nitration the bacteria in aquaponics and we can activity the bacterial to establish the colony in short time.

08 May 2017 4,181 3 View

I need link for book for procedures mineral analysis in plant?

I need the procedures for mineral analysis in plant and the chemical needed and also the equipment.

23 April 2017 8,759 2 View

Can anyone provide information or links on status of aquaponics in east asia?

information about aquaponics in Malaysia, Thailand and other east Asia countries.

10 April 2017 7,088 3 View