World Soil Resources Reports71/1

Cover
AGRO-ECOLOGICAL LAND RESOURCES ASSESSMENT FOR AGRICULTURAL DEVELOPMENT PLANNING
A CASE STUDY OF KENYA
RESOURCES DATA BASE AND LAND PRODUCTIVITY
Technical Annex 1
Land Resources
Contents


A.H. Kassam, H.T. van Velthuizen, G.W. Fischer and M.M. Shah

Any part of this land resources data base may be modified in the light of new knowledge and/or new objectives. The data base has been specially compiled for district and national planning, and is expected to be expanded and refined with use.

The designations employed and the presentation of the material in this document do not imply the expression of any opinion whatsoever on the part of FAO or IIASA concerning the legal or constitutional status of any sea area or concerning the delineation of frontiers.

M-51
ISBN 92-5-103299-8

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying or otherwise, without the prior permission of the copyright owner. Applications for such permission, with a statement of the purpose and extent of the reproduction, should be addressed to the Director, Publications Division, Food and Agriculture Organization of the United Nations, Viale delle Terme di Caracalla, 00100 Rome, Italy.

Land and Water Development Division Food and Agriculture Organization of the United Nations
and
International Institute for Applied Systems Analysis
1991

© FAO 1993


Hyperlinks to non-FAO Internet sites do not imply any official endorsement of or responsibility for the opinions, ideas, data or products presented at these locations, or guarantee the validity of the information provided. The sole purpose of links to non-FAO sites is to indicate further information available on related topics.

This electronic document has been scanned using optical character recognition (OCR) software. FAO declines all responsibility for any discrepancies that may exist between the present document and its original printed version.


Contents

Report and Technical Annexes

1   INTRODUCTION

2   CONCEPTS OF THE CLIMATIC INVENTORY

3   CLIMATIC DATA BANK

4   GROWING PERIOD ANALYSIS

4.1   Computer Printout and Symbols

4.2   Growing Period Model

4.3   Quality of Moisture Supply

4.4   Moisture Periods

4.5   Variability in Moisture Conditions

5   GROWING PERIOD ZONES

5.1   Length of Growing Period

5.2   Pattern of Length of Growing Period

5.3   Variability of Length of Growing Period

5.4   Intermediate Length of Growing Period

6   THERMAL ZONES

7   AREA INVENTORY OF CLIMATIC RESOURCES

8   SOIL RESOURCES

8.1   Exploratory Soil Map of Kenya

8.2   Soil Mapping Units

8.3   Landform

8.4   Geology

8.5   Soil Units

8.6   Soil Textures

8.7   Soil Stoniness

8.8   Soil Phases

8.9   Soil Mapping Unit Composition

9   LAND RESOURCES

9.1   Land use Overlays Computerized Land Resources Inventory

REFERENCES

Appendixes

4.1     Growing period analysis for Lamu (station 9240001)

5.1     Mean total dominant (mapped) length of growing period and associated (unmapped) mean total length of growing periods

5.2     Mean total length of growing period and corresponding individual component length of growing periods

8.1     Extents of soil mapping units

8.2     Diagnostic horizons and properties of soil units

8.3     Soil mapping unit composition

9.1     Extract of land resources inventory of Kiambo District

Figures

4.1     Schematic presentation types of growing periods

5.1     Number of growing periods and dry periods per year

7.1     District map of Kenya

7.2     Generalized map of thermal zones

7.3     Generalized map of mean total dominant length of growing period zones

7.4     Generalized map of pattern of length of growing period zones

8.1     Generalized map of landforms

8.2     Generalized map of slope gradient classes

8.3     Generalized map of geology/parent material

8.4     Example soil mapping unit composition of soil mapping unit Ps3

9.1     Make up of land resources inventory

9.2     Generalized map of cash crop zones

9.3     Generalized map of forest zones

9.4     Generalized map of parkland areas

9.5     Generalized map of irrigation schemes

9.6     Generalized map of tse-tse infestation areas

Tables

3.1     Extract agroclimatic data bank - data set 1 (historical data)

3.2     Extract agroclimatic data bank -data set 2 (average climatic data)

3.3     Extract agroclimatic data bank -data set 3 (average data)

5.1     Patterns of growing periods -historical profiles of occurrence of number of growing periods per year

5.2     Relationships between mean total dominant and mean total associated lengths of growing period

5.3     Relationships between individual component mean length and total length of growing period

7.1     Extents of districts and provinces of Kenya

7.2     Extents of thermal zones

7.3     Extents of mean total dominant length of growingperiod zones

7.4     Extents of pattern of length of growing period zones

8.1     Occurrence of soil mapping units by landform

8.2     Extents of landform units

8.3     Extents of slope classes

8.4     Associated slope classes

8.5     Quartiles of slope classes

8.6     Geology/parent material

8.7     Extents of geological units

8.8     Extents of soil units

8.9     Extents of textural classes

8.10   Extents of soil phases

9.1     Extents of cash crop zones

9.2     Extents of forest zones

9.3     Extents of parkland areas

9.4     Extents of irrigation schemes

9.5     Extents of tse-tse infestation areas