What is the optimum flow rate of water liters/min in NFT for lettuce crops??

More Abdelrazzaq M Al-Tawaha's questions See All

(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...

31 March 2024 9,243 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...

10 June 2020 3,292 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...

18 May 2020 2,804 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

28 March 2020 4,343 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.

24 March 2020 8,246 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,...

23 February 2020 3,406 8 View

What the differences between small scale aquaponics and low tech aquaponics?

What the differences between small scale aquaponics production and low tech aquaponic production in concept, mechanism, components and production.

09 October 2019 1,270 2 View

What the ideal methods for analysis Chlorophyll a and b, and Anthocyanin for hydroponics lettuce???

I need the full protocol for analysis Chlorophyll a and b, and Anthocyanin for hydroponics lettuce and the ideal solvent for analysis such as acetone for cholophyll and methanol for anthocyanin.

06 July 2019 6,154 3 View

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

29 June 2019 1,923 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...

09 June 2019 3,637 4 View

• What the possible Persistent Organic Pollutants and Heavy metals present in fluorspar, sediments, and water bodies around its mining area?

Approximate concentrations are require in compared with the WHO permissible limts

11 August 2024 2,723 1 View

Handling Missing Data and Building a Predictive Model with Incomplete Information ?

I am developing a predictive model for a water supply network that involves 20 influencing points. However, I only have historical data for 10 out of these 20 points. I would like to know how to...

10 August 2024 4,005 2 View

Do interactions between biosphere, carbon cycle, & water cycle impact global warming & interaction between atmosphere & hydrosphere?

How do interactions between the biosphere, the carbon cycle, and the water cycle impact global warming and interaction between the atmosphere and the hydrosphere?

09 August 2024 3,291 2 View

Is it true that $\det(V(A))$ may be only $\pm 1$, depending on $n$, for the last symmetric tridiagonal matrix $A$?

One can try to generalize the Vandermonde determinant in the following direction: Let $A$ be any symmetric $n$-order square matrix. Consider its powers' diagonal elements $(A^k)_{ii}$ and...

08 August 2024 6,690 1 View

How to determine positive-stained cells in FACS? Use isotype or unstained control?

To compare positive and negative cell populations in flow cytometry, should I compare unstained cells with antibody stained cells? Or with the isotype control? Most papers show comparison with...

06 August 2024 6,728 6 View

Why do we equate male and female arousal?

Women, on the other hand, can become physically aroused (increased blood flow in the reproductive organs) without becoming psychologically aroused even in the slightest. (Robert Weiss)

05 August 2024 9,537 2 View

How can i do multivariate Time Series forecast using MLP, ANFIS and LSTM?

I need the python code to forecast what crop production will be in the next decade considering climate and crop production variables as seen in the attached.csv file.

05 August 2024 2,977 3 View

Could dyes amplify the spectrum of light to a specific wavelength?

I am interested to know the behavior of dyes toward light. Specifically, Blue dyes re-emit the spectrum, especially from the green zone (known as principal in LED lamps, and blue dyes are known...

05 August 2024 3,290 1 View

How to Add Missing Water Molecules in Protein-Membrane Simulations?

I have protein-membrane simulations (PDB, PSF, DCD) and have noticed that water molecules near the protein are not visible in the simulations. How can I fix this issue? Is there a way to place the...

04 August 2024 1,200 2 View

Why is nonpoint source pollution potentially more harmful and difference between point and nonpoint sources of water pollution?

01 August 2024 1,180 2 View