जैब गलायनाय मुवाफोरनि सुबिदानि सायाव बिथा खालामनानैसो हाखर एबा गुदुंनि लावथायखौ थि खालामनो नांगौ ।
The length of trench should be determined on the basis of the availability of organically disintegrated substances .