13 Questions 25 Answers 0 Followers
Questions related from M. N. Islam
I have found that some researchers have determined water soluble Na, K, Ca and Mg through 1:5 or 1:10 (soil:water) ratio extract. Is this method reliable?
02 February 2019 1,860 3 View
Ca (gypsum) application reduces Na content in salt affected soil but due to poor drainage gypsum amendment might not be properly effective. Therefore, gypsum application with subsoil drainage...
04 April 2017 5,193 9 View
Normally we measure Na and K using 1M NH4OAC. Someone say it is exchangeable Na and K. On the other hand, someone say it is available (water soluble+exchangeable) Na and K. I am confused which one...
04 April 2017 6,844 19 View
It is well known that Mg is believed to cause dispersion of soil colloids and enhance surface sealing (Curtin et al. 1994). What is the mechanism? Which character of Mg is responsible for...
03 March 2017 9,527 20 View
We know that every nutrient has a critical limit for rice. But I need to know about critical limit of exchangeable sodium percentage (ESP) for rice. I have found from a literature that its value...
03 March 2017 6,252 14 View
If the soil has more than 50 ppm available S, what will be the impact on rice plant? What is the permissible limit of soil available S for rice plant? It is notable that soil pH is >5.8 and...
02 February 2017 1,843 20 View
There are some kinds of salt present in saline soil. As far I know, Na salt is more harmful than others. But I have no idea about effect of Mg salt (MgSO4) on soil health. What are the permissible...
11 November 2016 5,140 16 View
I have found controversy: Soil water salinity can affect soil physical properties by causing fine particles to bind together into aggregates. This process is beneficial in terms of soil aeration,...
11 November 2016 10,011 21 View
Rice yield depends on many factors, abiotic or biotic. Soil nutrient ratio is one of the most important factors for rice cultivation. Nutrient Imbalance creates unfavorable condition for rice. So,...
10 October 2016 9,544 8 View
Some researcher say gypsum increases soil EC and some people say gypsum decreases soil EC. Actually, which one is mostly accurate? What is the mechanism?
10 October 2016 6,750 22 View
Some researchers found that application of gypsum (CaSO4) in saline soil may reduce soil Na. As a consequence plant can uptake more K. However, some one says Ca has antagonistic effect on K...
10 October 2016 5,046 12 View
Soil-1: have large amount of Ca2+ and less amount of Na+, Mg2+, K+ and others Soil-2: have large amount of Na+, SO4- and less amount Ca2+, and others Total concentration of ions is about same in...
10 October 2016 4,205 24 View
Some researchers found gypsum amendment is a way to reduce salinity, but it is not suitable for all types of soil. Some researcher reported that ash from rice straw and rice husk may mitigate soil...
10 October 2016 1,392 31 View
