Land use Planning 125 Environmental aspects 78 Congresses 57 Agriculture 40 Economic aspects 37 Regional planning 36 more ... Law and legislation 33 Management 29 Sustainable development 23 Land tenure 22 City planning 21 Natural resources 19 Periodicals 17 Real estate development 17 Case studies 16 Data processing 16 Land use, Rural 15 Environmental protection 14 Geographic information systems 14 Remote sensing 13 Government policy 12 Landscape architecture 12 Landscape protection 11 Addresses, essays, lectures 10 Conservation of natural resources 10 Ecology 10 Soils 10 Cities and towns 9 Information storage and retrieval systems 9 less ...