Previous Page Table of Contents Next Page

Chapter 5
Agro-climatic suitability classification (continued)

HIGH INPUTS

Growth cycle 150–180 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.000.000.003.104.504.551.850.550.550.550.550.55
Perc. of Max. 20006899100411212121212
             
Suitability3NSMSSVSMSmSNS

1 Agronomically attainable yield

2 Perc. of Max refers to the yields of the respective growing periods expressed as a percentage of the maximum yield attainable from any growing period without permanent constraints

3 Suitability Very suitableSuitableModerately suitableMarginally suitableHot suitable
(VS)(S)(MS)(mS)(NS)
Yield (t/ha) :low inputs1.15–0.920.92–0.690.69–0.460.46–0.230.23–0.00
int. inputs2.85–2.282.28–2.711.71–1.141.14–1.570.57–0.00
high inputs4.55–3.643.64–2.732.73–1.821.82–0.910.91–0.00

TABLE 5.17
Agro-climatic suitability classification and yields (with agro-climatic constraints) in t/ha dry weight for oat

LOW INPUTS

Growth cycle 90–120 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.150.701.100.950.950.550.350.150.150.100.100.10
Perc. of Max. 21570100959555351515101010
             
Suitability3NSSVSSMSmSNS

INTERMEDIATE INPUTS

Growth cycle 90–120 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.331.752.552.482.431.380.980.300.300.280.280.28
Perc. of Max. 21369100979554381212111111
             
Suitability3NSSVSSMSmSNS

HIGH INPUTS

Growth cycle 90–120 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.502.804.104.003.902.201.600.450.450.450.450.45
Perc. of Max. 21268100989554391111111111
             
Suitability3NSSVSSMSmSNS

LOW INPUTS

Growth cycle 120–150 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.000.000.701.000.950.950.550.150.150.100.100.10
Perc. of Max. 200701009595551515101010
             
Suitability3NSSVSSMSNS

INTERMEDIATE INPUTS

Growth cycle 120–150 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.000.001.752.552.431.581.080.300.300.280.280.28
Perc. of Max. 200691009562421212111111
             
Suitability3NSSVSSMSmSNS

HIGH INPUTS

Growth cycle 120–150 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.000.002.804.104.002.201.600.450.450.450.450.45
Perc. of Max. 200681009854391111111111
             
Suitability3NSSVSMSmSNS

LOW INPUTS

Growth cycle 150–180 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.000.000.000.701.000.950.950.150.150.100.100.10
Perc. of Max. 20007010095951515101010
             
Suitability3NSSVSNS

INTERMEDIATE INPUTS

Growth cycle 150–180 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.000.000.001.752.552.481.280.300.300.280.280.28
Perc. of Max. 20006910097501212111111
             
Suitability3NSSVSNSNS

HIGH INPUTS

Growth cycle 150–180 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.000.000.002.804.104.001.600.450.450.450.450.45
Perc. of Max. 20006810098391111111111
             
Suitability3NSSVSMSmSNS

1 Agronomically attainable yield

2 Perc. of Max refers to the yields of the respective growing periods expressed as a percentage of the maximum yield attainable from any growing period without permanent constraints

3 Suitability Very suitableSuitableModerately suitableMarginally suitableHot suitable
(VS)(S)(MS)(mS)(NS)
Yield (t/ha) :lot inputs1.00–0.800.80–0.600.60–0.400.40–0.200.20–0.00
int. inputs2.55–2.042.04–1.531.53–1.021.02–0.510.51–0.00
high inputs4.10–3.283.28–2.462.46–1.641.64–0.820.82–0.00

TABLE 5.18
Agro-climatic suitability classification and yields (with agro-climatic constraints) in t/ha dry weight for cowpea

LOW INPUTS

Growth cycle 80–100 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.050.100.200.400.500.500.300.300.200.200.200.20
Perc. of Max. 210204080100100606040404040
             
Suitability3NSmSMSSVSSNS

INTERMEDIATE INPUTS

Growth cycle 80–100 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.200.500.851.401.451.451.001.000.750.400.300.25
Perc. of Max. 2143459971001.00696952282117
             
Suitability3NSmSMSSVSSMSmSNS

HIGH INPUTS

Growth cycle 80–100 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.350.901.502.402.402.301.701.701.200.600.400.30
Perc. of Max. 215386310010096717150251713
             
Suitability3NSmSMSSVSSMSmSNS

1 Agronomically attainable yield

2 Perc. of tax refers to toe yields of the respective growing periods expressed as a percentage of the maximum yield attainable from any growing period without permanent constraints

3 Suitability Very suitableSuitableModerately suitableMarginally suitableHot suitable
(VS)(S)(MS)(mS)(NS)
Yield (t/ha) :lot inputs0.50–0.400.40–0.300.30–0.200.20–0.100.10–0.00
int. inputs1.45–1.161.16–0.870.87–0.580.58–0.290.29–0.00
high inputs2.40–1.921.92–1.441.44–0.960.96–0.480.48–0.00

LOW INPUTS

Growth cycle 100–140 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.000.100.300.500.600.600.500.500.500.400.200.20
Perc. of Max. 20175083100100838383673333
             
Suitability3NS mSMSSVSSMSNS

INTERMEDIATE INPUTS

Growth cycle 100–140 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.000.601.111.951.951.951.501.451.100.650.400.30
Perc. of Max. 2031571.001001.00777456332115
             
Suitability3NSmSMSSVSSMSmSNS

HIGH INPUTS

Growth cycle 100–140 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.001.101.923.403.303.302.502.401.700.900.600.40
Perc. of Max. 2032561009797747150261818
             
Suitability3NSmSMSSVSSMSmSNS

1 Agrononicaily attainable yield

2 Perc, of tax refers to the yields of the respective growing periods expressed as a percentage of tie maximum field attainablefromant voting period without permanent constraints

3 Suitability Very suitableSuitableModerately suitableMarginally suitableHot suitable
(VS)(S)(MS)(mS)(NS)
Yield (t/ha) :low inputs0.60–0.480.48–0.360.36–0.240.24–0.120.12–0.00
int. inputs1.95–1.461.56–1.171.17–0.780.78–0.390.39–0.00
high inputs3.40–2.722.72–2.042.04–1.361.36–0.680.68–0.00

TABLE 5.19
Agro-climatic suitability classification and yields (with agro-climatic constraints) in t/ha dry weight for green gram

LOW INPUTS

Growth cycle 60–80 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.070.200.400.500.500.500.200.200.200.100.100.10
Perc. of Max. 2144080100100100404040202020
             
Suitability3NSmSMSSVSMSmS

INTERMEDIATE INPUTS

Growth cycle 60–80 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.170.600.901.201.201.150.800.800.400.300.200.15
Perc. of Max. 214507510010096676733251713
             
Suitability3NSMSSVSSMSmSNS

HIGH INPUTS

Growth cycle 60–80 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.271.001.401.901.901.801.401.400.600.500.300.20
Perc. of Max. 214537410010095747432261611
             
Suitability3NSMS SVSSmSNS

1 Agronomically attainable yield

2 Perc. of flax refers to the yields of the respective growing periods expressed as a percentage of the Maximum yield attainable from any growing period without permanent constraints

3 Suitability Very suitableSuitableModerately suitableMarginally suitableHot suitable
(VS)(S)(MS)(mS)(NS)
Yield (t/ha) :low inputs0.50–0.400.40–0.300.30–0.200.24–0.100.10–0.00
int. inputs1.20–0.960.96–0.720.72–0.480.48–0.240.24–0.00
high inputs1.90–1.521.52–1.141.14–0.760.76–0.380.38–0.00

LOW INPUTS

Growth cycle 80–100 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.100.300.500.600.600.600.300.300.200.100.100.10
Perc. of Max. 2175083100100100505033171717
             
Suitability3NSMS SVSSmSNS

INTERMEDIATE INPUTS

Growth cycle 80–100 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.250.801.201.551.551.551.101.000.500.350.250.20
Perc. of Max. 2165277100100100716532231613
             
Suitability3NSMS SVSSmSNS

HIGH INPUTS

Growth cycle 80–100 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.401.301.902.502.502.501.901.700.800.600.400.30
Perc. of Max. 2165276100100100766832241612
             
Suitability3NSMSSVSSmSNS

1 Agronomically attainable yield

2 Perc. of Max refers to the yields of the respective growing periods expressed as a percentage of the maximum yield attainable from any growing period without pertinent constraints

3 Suitability Very suitableSuitableModerately suitableMarginally suitableHot suitable
(VS)(S)(MS)(mS)(NS)
Yield (t/ha) :low inputs0.60–0.480.48–0.360.36–0.240.24–0.120.12–0.00
int. inputs1.55–1.241.24–0.930.93–0.620.62–0.310.31–0.00
high inputs2.50–2.002.00–1.501.50–1.001.00–0.500.50–0.00

TABLE 5.20
Agro-climatic suitability classification and yields (with agro-climatic constraints) in t/ha dry weight for pigeonpea

LOW INPUTS

Growth cycle 130–150 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.030.080.360.800.800.800.600.400.400.200.100.10
Perc. of Max. 241045100100100755050381919
             
Suitability3NSmSMSVSSMSmSNS

INTERMEDIATE INPUTS

Growth cycle 130–150 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.050.220.872.052.052.001.501.401.050.550.350.25
Perc. of Max. 22114210010098736851271712
             
Suitability3NSmSMSVSSMSmSNS

HIGH INPUTS

Growth cycle 130–150 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.070.351.383.303.303.202.402.401.700.900.600.40
Perc. of Max. 22114210010097737352271812
             
Suitability3NSmSMSVSSMSmSNS

1 Agronomically attainable field

2 Perc. of Sax refers to the fields of the respective growing periods expressed as a percentage of the maxim yield attainable from any growing period without permanent constraints

3 Suitability Very suitableSuitableModerately suitableMarginally suitableHot suitable
(VS)(S)(MS)(mS)(NS)
Yield (t/ha) :low inputs0.80–0.640.64–0.480.48–0.320.32–0.160.16–0.00
int. inputs2.05–1.641.64–1.231.23–0.820.82–0.410.41–0.00
high inputs3.30–2.642.64–1.981.98–1.321.32–0.660.66–0.00

LOW INPUTS

Growth cycle 150–170 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.000.000.401.000.900.900.700.500.500.200.200.10
Perc. of Max. 200401009090705050202010
             
Suitability3NSmSMSVSSMSmSNS

INTERMEDIATE INPUTS

Growth cycle 150–170 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.000.000.952.402.302.301.751.601.250.600.450.25
Perc. of Max. 200401009696736752251910
             
Suitability3NSmSMSVSSMSmSNS

HIGH INPUTS

Growth cycle 150–170 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.000.001.503.803.703.702.802.702.001.000.700.40
Perc. of Max. 200391009797747153261811
             
Suitability3NSmSMSVSSMSmSNS

1 Agronomically attainable yield

2 Perc, of Max refers to the fields of the respective growing periods expressed as a percentage of the maximum yield attainable from any growing period without permanent constraints

3 Suitability Very suitableSuitableModerately suitableMarginally suitableHot suitable
(VS)(S)(MS)(mS)(NS)
Yield (t/ha) :low inputs1.00–0.800.80–0.600.60–0.400.40–0.200.20–0.00
int. inputs2.40–1.921.92–1.441.44–0.960.96–0.480.48–0.00
high inputs3.80–2.043.04–2.282.28–1.521.52–0.760.76–0.00

LOW INPUTS

Growth cycle 170–190 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.000.000.000.891.001.010.770.730.550.270.200.10
Perc. of Max. 20008899100767254272010
             
Suitability3NSSVSSNSmSNS

INTERMEDIATE INPUTS

Growth cycle 170–190 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.000.000.002.222.492.531.931.821.330.670.490.25
Perc. of Max. 20008898100767253261910
             
Suitability3NSSVSSNSmSNS

HIGH INPUTS

Growth cycle 170–190 days

LGP (days)60–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Yield 10.000.000.003.553.984.043.082.912.211.070.770.40
Perc. of Max. 20008899100767255261910
             
Suitability3NSSVSSNSmSNS

1 Agronomically attainable yield

2 perc of Max refers to the yields of the respective growing periods expressed as a percentage of the maximum yield attainable from any growing period without permanent constraints

3 Suitability Very suitableSuitableModerately suitableMarginally suitableHot suitable
(VS)(S)(MS)(mS)(NS)
Yield (t/ha) :low inputs1.01–0.810.81–0.610.61–0.400.40–0.200.20–0.00
int. inputs2.53–2.022.02–1.521.92–1.011.01–0.510.51–0.00
high inputs4.04–3.233.23–2.422.42–1.621.62–0.810.81–0.00

Cultivation of Fluvisols is generally governed by the depth, intensity and duration of flooding which occurs in the low-lying areas of these soils. These flooding attributes are generally controlled, not by the amount of ‘on site’ rainfall but by external factors such as river flood regime, hydrological features of catchment area and catchment-site relationship. Additionally, cultivation of these soils is normally confined to post flood periods, the crops being grown to a lesser or greater extent on moisture remaining in the soil. As a result of these factors, the anticipated yields according to length of growing period and the agro-climatic suitability classification (Tables 5.16–5.20) are not applicable to Fluvisols.

For Fluvisols, the agro-climatic suitability classification that has been considered to apply to conditions in Kenya is given in Tables 5.21,5.22, and 5.23 for low, intermediate and high levels of input respectively. For all crops in all thermal zones, areas of all lengths of growing periods greater than 270 days are agro-climatically classified as ‘not suitable’ because of excessive wetness/flooding.

TABLE 5.21
Fluvisols ratings at low level of Inputs

CropGrowth cycleMaximum yieldLength of Growing Period (days)
(days)(t/ha)01–2930–5960–8990–119120–149150–179180–209210–239240–269270–299300–329330–364365-365+
Barley90–1201.15NNS3S3S2S2S2S3S4S4NNNNN
Barley120–1501.15NNS3S3S2S2S2S3S4S4NNNNN
Barley150–1801.15NNS4S3S2S2S2S3S4S4NNNNN
Oat90–1201.00NNS3S3S2S2S2S3S4S4NNNNN
Oat120–1501.00NNS3S3S2S2S2S3S4S4NNNNN
Oat150–1801.00NNS4S3S2S2S2S3S4S4NNNNN
Cowpea80–1000.50NNS3S3S2S2S2S3S4S4NNNNN
Cowpea100–1400.60NNS3S3S2S2S2S3S4S4NNNNN
Green gram60–800.50NS4S3S3S2S2S2S3S4S4NNNNN
Green gram80–1000.60NS4S3S3S2S2S2S3S4S4NNNNN
Pigeonpea130–1500.80NNS3S3S2S2S2S3S3S4NNNNN
Pigeonpea150–1701.00NNS4S3S2S2S2S3S3S4NNNNN
Pigeonpea170–1901.01NNNS4S3S2S2S3S3S4NNNNN

S1- No/slight limitations

S2 - Slight/moderate limitations

S3 - Moderate/severre limitations

S4 - Severe limitations

N - Not suitable

TABLE 5.22
Fluvisols ratings at intermediate level of inputs

CropGrowth cycleMaximum yieldLength of Growing Period (days)
(days)(t/ha)01–2930–5960–8990–119120–149160–179180–209210–239240–269270–299300–329330–364365-365+
Barley90–1202.85NNS3S3S2S2S2S3S4S4NNNNN
Barley120–1502.85NNS3S3S2S2S2S3S4S4NNNNN
Barley150–1802.85NNS4S3S2S2S2S3S4S4NNNNN
Oat90–1202.55NNS3S3S2S2S2S3S4S4NNNNN
Oat120–1602.55NNS3S3S2S2S2S3S4S4NNNNN
Oat150–1802.55NNS4S3S2S2S2S3S4S4NNNNN
Cowpea80–1001.45NNS3S3S2S2S2S3S4S4NNNNN
Cowpea100–1401.95NNS3S3S2S2S2S3S4S4NNNNN
Green gram60–801.20NS4S3S3S2S2S2S3S4S4NNNNN
Green gram80–1001.65NS4S3S3S2S2S2S3S4S4NNNNN
Pigeonpea130–1502.05NNS3S3S2S2S2S3S3S4NNNNN
Pigeonpea150–1702.40NNS4S3S2S2S2S3S3S4NNNNN
Pigeonpea170–1902.53NNNS4S3S2S2S3S3S4NNNNN

S1 - No/slight limitations

S2 - Slight/moderate limitations

S3 - Moderate/severre limitations

S4 - Severe limitations

N - Not suitable

TABLE 5.23
Fluvisols ratings at high level of inputs

CropGrowth cycleMaximum yieldLength of Growing g Period (days)
(days)(t/ha)01–2930–5960–8990–119120–149160–179180–209210–239240–269270–299300–329330–364366-365+
Barley90–1204.55NNS3S3S2S2S2S3S4S4NNNNN
Barley120–1604.55NNS3S3S2S2S2S3S4S4NNNNN
Barley150–1804.55NNS4S3S2S2S2S3S4S4NNNNN
Oat90–1204.10NNS3S3S2S2S2S3S4S4NNNNN
Oat120–1504.10NNS3S3S2S2S2S3S4S4NNNNN
Oat150–1804.10NNS4S3S2S2S2S3S4S4NNNNN
Cowpea80–1002.40NNS3S3S2S2S2S3S4S4NNNNN
Cowpea100–1402.40NNS3S3S2S2S2S3S4S4NNNNN
Green gram60–801.90NS4S3S3S2S2S2S3S4S4NNNNN
Green gram80–1002.60NS4S3S3S2S2S2S3S4S4NNNNN
Pigeonpea130–1503.30NNS3S3S2S2S2S3S3S4NNNNN
Pigeonpea150–1703.80NNS4S3S2S2S2S3S3S4NNNNN
Pigeonpea170–1904.04NNNS4S3S2S2S3S3S4NNNNN

S1 - No/slight limitations

S2 - Slight/moderate limitations

S3 - Moderate/severre limitations

S4 - Severe limitations

N - Not suitable

Previous Page Top of Page Next Page