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| Manual | Crop index - Type of crops | Crop index - Common names | Crop index - Taxonomic names | |
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Carrot (Daucus carota L. var. sativus Hoff.) French: Carotte; Spanish: Zanahoria; Italian: Carota; German: Möhre | Under
Temperate Conditions
| Crop
data Biennial, cropped as annual. Harvested part: root. Growth cycle for root production 100-180 days depending on cultivar. Plant density: about 100/m2 (for half-long cultivars). Yields 25-50 t/ha
(half-long cultivars). Requires light or well-textured soils, rich in decomposed
organic matter; does not tolerate acid, alkaline or saline soils. Adapts well to
climatic conditions. Nutrient
demand/uptake/removal In kg for crop yielding 30 t/ha : N = 90-120, P2O5 = 30-45, K2O =
150-300. Fertilizer
recommendations Adequate rate of fertilizer use in normal soils is estimated to be 120 kg
N, 100 kg P2O5, 200-250 kg K2O per ha. It is recommended that one-quarter of the
total N should be applied at sowing and the remainder in two topdressings. P2O5
and K2O should be incorporated in the soil before sowing. Direct use of organic
manures should be avoided. N deficiency impairs root colour by diminishing carotene synthesis.
Excessive N may not only delay root growth and reduce keeping quality but may
also increase the nitrate content, an important factor in roots to be processed
for use in babyfoods. Excessive K can reduce uptake of Mg. Chloride salts should
be avoided because excessive Cl reduces carotene content. Boron is an important nutrient; foliar spray application is beneficial
where calcareous soils contain <1 ppm B and where there is less than 18 ppm B
in the leaves. Under Tropical/Subtropical
Conditions Carrot
(Daucus carota
L.) Crop
data Directly seeded. Harvested four months after sowing. Plant density: 435
600 plants/ha. Preferably grown in loose, deep, well-drained soil. The crop is
adapted to highland conditions in the tropics. Target marketable yields in
intensive commercial production = 25 - 37 t/ha. Nutrient
demand/uptake/removal
Plant
analysis data
Fertilizer
recommendations Apply well decomposed organic matter to prevent forked root development.
Excessive N may also be partly responsible for splitting or forked roots; heavy
N treatments also promote foliage growth at the expense of root growth.
Fertilizer should be applied at least 7 days before sowing, as the crop is
susceptible to salt injury. Carrots respond well to B and to lime and Mg
applications, as well as to N, P and K . N and K are applied before root
enlargement, about 30 days after germination. Present
fertilizer practices Senegal (Camberene) On light sandy soils in semi-arid conditions apply 20t/ha of organic
manure, 60 kg/ha N, 60 kg/ha P2O5 and 120 kg/ha K2O. All organic manure and P2O5
and 20 % of N and K2O broadcast before planting; 40 % of N and K2O sidedressed
30 and 60 days after planting. Brazil (Minas Gerais) General recommendations are, firstly, 40 kg/ha N, 320 kg/ha P2O5 and 240
kg/ha K2O incorporated in the soil at planting and, secondly, 80 kg/ha N and 40
kg/ha K2O broadcasted in 2 applications 15 and 30 days after planting. Philippines (Los Banos) A broadcast application of 500 - 600 kg/ha of a 10-25-25 mixture is
recommended, or in K deficient soils 1 000 - 1 200 kg/ha 5-10-16 . Further
reading
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