| World Soil Resources Reports | 71/4 |
 | AGRO-ECOLOGICAL LAND RESOURCES ASSESSMENT FOR AGRICULTURAL DEVELOPMENT PLANNING A CASE STUDY OF KENYA RESOURCES DATABASE AND LAND PRODUCTIVITY Technical Annex 4 Crop Productivity |
A.H. Kassam, H.T. van Velthuizen, G.W. Fischer and M.M. Shah
Any part of this crop productivity model and the model parameters may be modified in the light of new knowledge and/or new objectives. The model is part of a larger district and national level planning tool and is expected to be expanded and refined with use.
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M-51
ISBN 92-5-103308-0
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Land and Water Development Division
Food and Agriculture Organization of the United Nations
and
International Institute for Applied Systems Analysis
1991
© FAO 1993
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4 LAND SUITABILITY ASSESSMENT AND SELECTION OF CROP OPTIONS
4.1 Crops and Land Utilization Types
4.4 Length of Growing Period (LGP) Zone Suitability
4.7 Soil Erosion and Yield Loss
5 FORMULATION OF CROPPING PATTERN OPTIONS
6 FORMULATION OF CROP ROTATION OPTIONS
6.1 Crop Combination Requirements
7 QUANTIFICATION OF PRODUCTIVITY POTENTIALS OF CROP ROTATIONS
7.3 Production Stability Constraints
7.4 Crop Productivity Potential
8 INTERPHASE WITH FUELWOOD AND LIVESTOCK PRODUCTIVITY MODELS PRODUCTIVITY MODELS
8.1 Fuelwood Productivity Model
8.3 Fodder Potential of Fallow Land
8.4 Crop Residues, Crop By-products and Crop Primary Products
Figures
2.1 Schematic presentation of crop productivity Model
3.1 Make-up of land resources data base
Tables
4.1 List of crops included in the assessment
4.2 Attributes of the land utilization types
4.4 Patterns of growing periods - Historical profiles of occurrence of number of length of growing periods per year (LGP-Patterns)
4.5 Relationships between mean total dominant and mean total associated lengths of growing period
4.6 Relationships between individual component mean length and mean total length of growing period
4.7 Reduction ratings for perennials matched to total LGP (days)
4.12 Quartiles of slope classes
4.13 Slope-cultivation association screen
4.14 Relationships between topsoil loss and yield loss
4.15 Ranking of soils (Kenya Soil Survey) according to their susceptibility to productivity loss per unit of topsoil loss
4.16 Regeneration capacity of topsoil (mm/year) by LGP and thermal zone
5.1 Definitions of the principle multiple cropping patterns
5.2 Related terminology used in multiple cropping systems
5.3 Important rainfed cropping patterns generalized according to thermal zones and length of growing period zones
6.1 Decomposition constant (%) under cropping (kc) and fallow (kf)
6.2 Reference fallow factor (F) (%)
6.3 Effect of soil fertility on reference fallow factor (F)
7.1 Yield reductions (%) of crops when grown as second or third crop in the annual cropping pattern relative to its yield as a first crop
7.2 Suggested land equivalent ratios (LER) at different input levels by length of growing period (LGP) and crop yield relative to maximum attainable yield
7.3 Seed requirements (kg/ha dry weight of product)
7.4 Calorie and protein nutritive values of 100 g of food product
APPENDIX TABLES
A4.1 Crop growth cycle and thermal regime associations
A4.2 Thermal zones suitability ratings
A4.3 Crop yields (t/ha dry weight) at high level of inputs by LGPs (days)
A4.4 Crop yields (t/ha dry weight) at intermediate level of inputs by LGPs (days)
A4.5 Crop yields (t/ha dry weight) at low level of inputs by LGPs (days)
A4.6 LGP allocation ratings for coffee (arabica) at high level of inputs
A4.7 LGP allocation ratings for coffee (arabica) at intermediate level of inputs
A4.8 LGP allocation ratings for coffee (arabica) at low level of inputs
A4.9 LGP allocation ratings for cotton at high level of inputs
A4.10 LGP allocation ratings for cotton at intermediate level of inputs
A4.11 LGP allocation ratings for cotton at low level of inputs
A4.12 LGP allocation ratings for pineapple at high level inputs
A4.13 LGP allocation ratings for pineapple at intermediate level of inputs
A4.14 LGP allocation ratings for pineapple at low level of inputs
A4.15 LGP allocation ratings for pyrethrum at high of level of inputs
A4.16 LGP allocation ratings for pyrethrum at intermediate level of inputs
A4.17 LGP allocation ratings for pyrethrum at low level of inputs
A4.18 LGP allocation ratings for sisal at high level of inputs
A4.19 LGP allocation ratings for sisal at intermediate level of inputs
A4.20 LGP allocation ratings for sisal at low level of inputs
A4.21 LGP allocation ratings for tea at high level of inputs
A4.22 LGP allocation ratings for tea at intermediate level of inputs
A4.23 LGP allocation ratings for tea at low level of inputs
A4.24 Fluvisols ratings at high level of inputs
A4.25 Fluvisols ratings at intermediate level of inputs
A4.26 Fluvisols ratings at low level of inputs
A4.27 Soil unit ratings for crops at high, intermediate and low levels of inputs
A4.28 Stoniness ratings for crops at high, intermediate and low levels of inputs
A4.29 Soil phase ratings for crops at high, intermediate and low levels of inputs
A6.1 Fallow requirements (F,%) at low level of inputs