@ARTICLE {HULUGALLE:1990d,
title = {Effect of seedbed preparation method and mulch on soil physical properties and yield of cowpea in a rice fallow of an inland valley swamp},
author = {Hulugalle, N. and Palada, M. C. },
journal = {Soil and Tillage Research},
year = {1990},
volume = {17},
pages = {101--113},
}