Diseases and disease resistance in natural populations of crop progenitors.

Formation of water repellent soils by irrigation, Effect of contact angle on water flow in soils, Plant-water relationships, Irrigation control

פרס רוטשילד 1998
פרס קיי 2001

Physical chemistry of humic substances, minerals and their interactions, Effects of organic matter on soil fertility and structure.

Behavioral ecology of insects, Insect microbe interactions, Integrated pest management

Water purification from chemicals and microorganisms by granulated micelle-clay complexes: experimental and modeling. Filtration and degradation.

Water Treatment Technology.

Economics of tourism, Rural tourism, Economic value of open space & agricultural landscape.

Natural resource and environmental economics, Dynamic models in natural resource management

פרס ישראל תשע״ד
פרס רוטשילד 1994

Biology, ecology and control of soil-borne plant pathogens, Soil solarization.

Soil chemistry and soil fertility, related to plant nutrition and environmental aspects.