FOREWORD; INTRODUCTION; Chapter 1 THE DYNAMICS OF LAND UTILIZATION; Chapter 2 THE INTERDEPENDENCE OF LAND USE AND TECHNICAL CHANGE; Chapter 3 LABOUR PRODUCTIVITY UNDER LONG-FALLOW AND SHORT-FALLOW SYSTEMS; Chapter 4 CARRYING CAPACITY OF LAND AND PRODUCTIVITY OF LABOUR UNDER INTENSIVE AGRICULTURE; Chapter 5 POPULATION GROWTH AND WORKING HOURS; Chapter 6 THE COEXISTENCE OF CULTIVATION SYSTEMS; Chapter 7 DIMINISHING RETURNS TO LABOUR AND TECHNICAL INERTIA; Chapter 8 THE VICIOUS CIRCLE OF SPARSE POPULATION AND PRIMITIVE TECHNIQUES; Chapter 9 SYSTEMS OF LAND USE AS A DETERMINANT OF LAND TENURE; Chapter 10 INVESTMENT AND TENURE IN TRIBAL COMMUNITIES; Chapter 11 RURAL INVESTMENT UNDER LANDLORD TENURE; Chapter 12 INCENTIVES TO INVESTMENT UNDER MODERN TENURE; Chapter 13 THE USE OF INDUSTRIAL INPUT IN PRIMITIVE AGRICULTURE; Chapter 14 SOME PERSPECTIVES AND IMPLICATIONS;