The nature and productivity of Rod-kohi soils in D.I. Khan [Pakistan]

abonos fosfatados abonos nitrogenados abonos potasicos analyse de l'eau cost benefit analysis electrical conductivity engrais potassique fertilisation fertilizer application fosforo nitrogen fertilizers organic matter pakistan pennisetum typhoides phosphate fertilizers phosphore phosphorus potash fertilizers potasio potassium rendement rendimiento salinidad salinity soil chemicophysical properties soil types type de sol water analysis yields