Gerhard Mostert
Nutrient Replacement Values:kg/ton DIS NutsN         P         K         Ca        Mg    Zn          Cu          B        ...
• Leaf Analysis• Soil Analysis• Water Analysis
Nitrogen (N)              Flower Panicle Flowering                      Fruit Growth                                      ...
Potassium (K)             Flower Panicle Flowering                       Fruit Growth                                     ...
Phosphate (P)             Flower Panicle Flowering                   Fruit Growth                                         ...
Calcium (Ca)             Flower Panicle Flowering                   Fruit Growth                                          ...
Magnesium (Mg)             Flower Panicle Flowering                   Fruit Growth                                        ...
Leaf Sprays         Flower Panicle Flowering                         Fruit Growth                                         ...
Nutrition and soil health to optimize production   nutritional practices in south african macadamia production - gerhard m...
Nutrition and soil health to optimize production   nutritional practices in south african macadamia production - gerhard m...
Nutrition and soil health to optimize production   nutritional practices in south african macadamia production - gerhard m...
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Nutrition and soil health to optimize production nutritional practices in south african macadamia production - gerhard mostert

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Nutrition and soil health to optimize production nutritional practices in south african macadamia production - gerhard mostert

  1. 1. Gerhard Mostert
  2. 2. Nutrient Replacement Values:kg/ton DIS NutsN P K Ca Mg Zn Cu B Mn Fe17 -22 0.5 - 2 15 - 25 15 - 20 1-3 0.2 – 0.5 0.05 – 0.08 0.2 – 0.5 0.5 - 1 0.5 - 1 kg/ 4 ton DIS Nuts N P K Ca Mg Zn Cu B Mn Fe 80 8 80 70 12 2 0.3 2 4 4 • Cultivar • Growth conditions • Climate • Water • Soil • Management
  3. 3. • Leaf Analysis• Soil Analysis• Water Analysis
  4. 4. Nitrogen (N) Flower Panicle Flowering Fruit Growth Oil Accumulation Root Growth Vegetative growth 20 % 20 % 25 % 15 % 20 % MAY JUN JUL AUG SEPT OCT NOV DEC JAN FEB MAR APR1. Important for manipulation2. Positive relation with yield3. Negative influence on fruit size4. Stimulate Vegetative and root flush
  5. 5. Potassium (K) Flower Panicle Flowering Fruit Growth Oil Accumulation Root Growth Vegetative growth 40 % 40 % 20 % MAY JUN JUL AUG SEPT OCT NOV DEC JAN FEB MAR APR1. Important for fruit size2. Water regulation and cold tolerance3. Transportation of assimilates en other nutrients
  6. 6. Phosphate (P) Flower Panicle Flowering Fruit Growth Oil Accumulation Root Growth 100 % Vegetative growth MAY JUN JUL AUG SEPT OCT NOV DEC JAN FEB MAR APR1. Energy2. Mac’s very effective on P uptake
  7. 7. Calcium (Ca) Flower Panicle Flowering Fruit Growth Oil Accumulation Root Growth 100 % Vegetative growth MAY JUN JUL AUG SEPT OCT NOV DEC JAN FEB MAR APR1. Fruit Quality2. Roots
  8. 8. Magnesium (Mg) Flower Panicle Flowering Fruit Growth Oil Accumulation Root Growth 100 % Vegetative growth MAY JUN JUL AUG SEPT OCT NOV DEC JAN FEB MAR APR1. Chlorophyll
  9. 9. Leaf Sprays Flower Panicle Flowering Fruit Growth Oil AccumulationRoot Growth Vegetative growthMAY JUN JUL AUG SEPT OCT NOV DEC JAN FEB MAR APR Cu Zn Fe Zn B Mn B Ureum KNO3 CaNO3
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