Site and altitude in m

Response coefficients, Yield = a − bcr

r = elemental nutrient rate

bBCbcr;

r = elemental nutrient rate

Increase in yield due to incremental increase in elemental nutrient rate (kg/ha)

Recommended nutrient rate

Nutrient

a

b

c

0 - 5

5 - 10

10 - 15

15 - 20

EOR

Rec††

t/ha

Yield increase, kg/ha

kg/ha

Dedza (>1300)

P

1.457

0.607

0.883

0.281

0.151

0.081

0.043

20

9 - 18

K

0.837

0.019

0.908

0.007

0.004

0.003

0.002

0

0

Lilongwe (760 - 1300)

P

1.359

0.608

0.868

0.308

0.152

0.075

0.037

17

9 - 18

K

1.402

0.508

0.781

0.360

0.105

0.030

0.009

16

0

Salima (200 - 760)

P

1.359

0.608

0.868

0.308

0.152

0.075

0.037

17

9 - 18

K

1.402

0.508

0.781

0.360

0.105

0.030

0.009

16

0