ARCHIVE: Fertiliser Manual (RB209)

Cauliflower and Calabrese

 

SNS, P, K or Mg Index

 
 

0

1

2

3

4

5

6

 

kg/ha

 
Nitrogen (N) - all soil types

 

 

 

 

 

 

 

Cauliflower, summer/autumna

290

260

235

210

170

80

0b

Cauliflower, winter hardy/roscoffa

 

 

 

 

 

 

 

- seedbed

100

100

100

100

60

0b

0b

- top-dressing

190

160

135

110

100

80

0b

Calabresea

235

200

165

135

80

0b

0b

Phosphatec (P2O5)

200

150

100

50

0

0

0

Potashc (K2O)

275

225

175 (2-)
125 (2+)

35

0

0

0

Magnesium (MgO)

150

100

0

0

0

0

0

a. The recommendations assume overall application. Band spreading of nitrogen may be beneficial (see ‘Techniques for Applying Fertiliser’ above).
b. A small amount of nitrogen may be needed if soil nitrogen levels are low in the 0-30 cm of soil (see ‘Techniques for Applying Fertiliser’ above).

Cauliflower and calabrese

Where there is a risk of poor establishment or leaching, apply no more than 100 kg N/ha at sowing or transplanting. The remainder should be applied when the crop is established but before the surface soil dries out.

There is a benefit from banding or placing the nitrogen applied at sowing or transplanting – if nitrogen is only applied to half the width of the row reduce the seedbed application by 33%. The SNS Index for second crops grown in the same season is likely to be between Index 4 and 6 depending on the growing conditions of the first crop (Section 2)

Cauliflower, winter hardy/roscoff

Apply no more than 100 kg N/ha at sowing or transplanting, less if there is risk of frost damage. The amount of nitrogen applied subsequently will depend on crop growth, for example up to 60 kg N/ha per month in the south west and 20 kg N/ha in the north.

Where seedbed SNS exceeds 4 and crops are likely to be harvested in April or later the topdressing should be left until the start of growth in the spring but then the SNS may need to be recalculated to take account of any over-winter losses of nitrogen, uptake of nitrogen by the crop as well as mineral nitrogen to 90 cm.

Sulphur

Consider applying up to 50 kg SO3/ha in situations where sulphur content of soils is low, for example on light soils following wet winters where there is no history of organic manures application.

Don’t forget to:

  • make allowance for nutrients applied in organic manures (see Section 2)
  • ensure the phosphate and potash offtake is balanced by application on Index 2 soils and check that the soil is maintained at Index 2 by soil sampling every 3 – 5 years
ADLib logo Content provided by the Agricultural Document Library
© University of Hertfordshire, 2011