TY - BOOK AU - RAJINDER Kumar TI - Evaluation of the effectiveness of filter materials for tile drains U1 - T 627.54 R14E PY - 1971/// CY - Ludhiana PB - P. A. U KW - AGRICULTURAL ENGINEERING KW - DRAINAGE RESEARCH KW - FILTER KW - IRRIGATION RESEARCH KW - TILE, EFFICIENCY N2 - Studies were carried out with a view to evaluate the efficiency of different filter materials for tile drains in a sandy soil and to find optimum thickness of gravel filter. The materials tested were rice husk, saw dust, burnt coals, gravel and polythene ER -