I need this item for study in greenhouse and in pot condition.
Mr.Habib,please see the research gate link . www.researchgate.net/post/how_can_I_determine_the_field_capacity_FC_and_the _permanent_wilting_point_PWP_of _soils
Our report describes a method we used:
https://www.researchgate.net/publication/235120181_Legacy_Chlordane_in_Soils_from_Housing_Areas_Treated_with_Organochlorine_Pesticides?ev=prf_pub
Technical Report Legacy Chlordane in Soils from Housing Areas Treated with Or...
Since you're on pot and in greenhouse conditions, simply saturate your soil by water and collect water drainage below the pot. The difference between provided water quantity and the other one drained after 48 hours, seems a reasonable estimate of the water soil capacity at field.
Dr.Mohammed, your suggestions appears to be good.Can we not do the same in soil column or leaching tube packed appropriately with soil instead of pot?
Dear Pr Annangi, yes we can use the same method on soil column. Dr. Habib wanted a simple measurement method for determining the field capacity of soil. It should however, be noted that in pot or in soil column, we work on a disturbed soil sample that not represents exactly the characteristics of the soil in situ.
Dr.Mohammed,I agree that it may not truly represent field conditions.Normally 2 mm sieve passed soil is packed in the column to a uniform bulk density by tapping and then field capacity is measured.Probably,pot may be a better option as we can saturate the soil in the pot by keeping it in water filled tray.After the soil is saturated the pot can be removed from the try and the gravitational water can be drained from the pot through drainage hole in the bottom.
Dear Pr Annangi, Yes, we need only know the water volume provided and this drained for getting the difference of water retained by the soil after 48 hours.
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