Soil conservation:

26220 290 10 Soil conservation: problems and prospects mixed material 0471278823 Chichester John Wiley & Sons 1981 Properties and management of soils in the tropics mixed material 0471752002 New York John Wiley & Sons 1976 Modification of soil structure mixed material 0471995304 Chichester John Wiley & Sons 1978 Plant and soil water relationships: a modern synthesis mixed material New Delhi Tata McGraw-Hill 1969 Soils: an introduction to soils and plant growth mixed material 0138222886 New Jersey Prentice Hall Soil management for conservation and production mixed material 0471169951 New York John Wiley & Sons 1962 Ilmu tanah mixed material Jakarta Bhratara Karya Aksara 1982 Kumpulan karya tulis Perum Perhutani mixed material Jkt Perpustakaan Forestry Centre 1982 Some problems in the implementation of agricultural research projects with a farming systems perspective mixed material Gaenesville, Florida FSSP 1983 Agriculture in semi-arid environments mixed material 3540094148 Berlin Springer Verlag 1979