Leangsrun Chea

11 Questions 7 Answers 0 Followers

Questions related from Leangsrun Chea

Can any one suggest a simple leaf sample grinder with low cost?

I am looking for a plant leaf sample grinder. This should be a simple one with more convenient to operate and clean.

13 February 2018 9,842 5 View

How can I distinguish between early blight and late blight on tomato leaf?

I am wondering if anyone has practical examples on how to differentiate between early blight and late blight infection on tomato leaf? To me, I feel a bit difficult to identify them at the early...

07 July 2016 6,170 8 View

Is there a formula to calculate plant height relative growth rate?

I measure plant height from two points of time during growing period and I want to determine the rate of plant height increase per specific time, i. e. per week. I am wondering if there is a...

26 March 2016 6,738 6 View

Statistical program for phenotypic and genotypic correlation coefficient calculation and path coefficient analysis

I am working on the evaluation of some tomato cultivars. I am wondering if you can give some suggestion on how genotypic and phenotypic correlation coefficient calculation and path coefficient...

11 February 2016 1,924 14 View

Is leaf chlorophyll content lower in plants with dense leaves?

I made an experiment with several tomato cultivars. I measured chlorophyll content at one middle leaf by using SPAD 502. The result showed that plant with dense leaves (high number of internodes)...

27 January 2016 6,790 10 View

Is it possible to calculate harvest index of tomato by using fresh weight of fruits and shoot?

I have worked on a tomato variety trial and it might not be possible to harvest tomato plants and oven-dry them to determine above ground dry matter due to too many tomato plants. I am wondering...

08 January 2016 4,600 4 View

Is it possible to include green (premature) fruits in the total yield of tomato?

I conducted a variety trial of tomato. However, due to early frost period, I decided to harvest all mature fruits and cut the plants to determine plant biomass while there was some premature...

29 November 2015 9,796 13 View

Is there a calibration equation to convert SPAD-502 reading value into total leaf chlorophyll content of tomato cultivars?

I am conducting a variety trial of 60 tomato cultivars and I want to determine leaf chlorophyll content of each tomato cultivar by using SPAD 502. Some calibration equation I have found mostly...

25 October 2015 9,695 4 View

Can anybody share the experience measuring leaf area of different tomato cultivars by performing a quick and easy nondestructive method?

I am working on a study of agronomic performance of tomato cultivars and I want to see the leaf area variation. Since there are many cultivars that I am working with, I am looking for a simple...

01 May 2015 3,531 6 View

What are the main consrtaints of the fermentation process in the plant?

My friends and I were discussing on O2 deficiency in plant. By reading on a lecture note, this question was popped up and we got stuck for the discussion.

30 November 2014 8,350 2 View

Why barley is an ammonium-sensitive plant while rice is not?

My friends and I were reading an article and something drew out attention was about ammonium toxicity on plant. We came up with the idea that it is due to the ammonium inflow rate to the root of...

30 November 2014 6,673 8 View