Here are some truisms from agribusiness.
Even if these seem more like entertainment in the context of
context of aqua- and hydroponics, there are often essential
essential insights can be found. So: good entertainment and
more success in the allotment garden, which hopefully is a permaculture.
Best yields when late varieties are sown early
Temperature sum model
Fixed sowing schedule according to growth progress
Crop rotation
With direct succession up to 60% yield loss
Previous crop
Good suitability pea, it leaves behind a lot of sodium
Criteria Variety selection Pea
Self-fruitful, early or late, sterile number of nodes, heat sum
Fertilisation of pea
Organic only in autumn (phytopatological reasons)
Sodium fertilisation lower than withdrawal due to rhizobium
Calculation temperature sum model
Average harvest month (-limit) divided by average sowing month (-limit) results in daily sowing intervals
Calculation of sowing rate
Stand density times dry matter divided by field emergence in %.
AIS
Measures sugar, salt, hemicellulose, pectins, fibres to classify harvest time
Tenderometer
Measures shear forces for pea harvesting
Carrot
Beet is formed by activity of the secondary cambium, the upper part of the root and the hypocotyl
Day length response
Short day during and long day after vernalisation. Temperatures above 16°C have a devernalising effect
Carrots for the industry
Cultivation in dams to produce more mass, form does not matter.
Carrot fertilisation
Potassium very positive on yield
Nitrogen requirement low (high N delays colouring)
Carrot irrigation
Balanced and good otherwise bursting
Intensive outdoor cultivation
Use of young plants; film/fleece; seed cultivation; sprinkling
Vernalisation Cabbage
Qualitative need, if not met cabbage remains vegetative and does not flower
Shortening the cultivation period for cabbage
High temperatures during the juvenile phase and head growth
Cultivation time extension Cabbage
High temperatures after the juvenile phase
Leave cabbage
High temperatures for head establishment. Long cool phase after head establishment is better
Semolina cabbage
After warm period temperature drops for a long time (flower buds emerge)
Storage Cabbage
Sensitive to ethylene
Fresh mass is usually available
Asparagus care
Keep free of weeds, but sensitive to herbicides
Low water requirement during the stinging period
Peak wilt asparagus
In case of strong growth under water and Ca deficiency
Films
Transparent = high heating
Black = medium heating
White = low heating
Soil heating
A few weeks earlier
Mini tunnel
2-3 weeks earlier
Air tunnel
1-2 months earlier
Red asparagus
Light influence after harvest
Greenhouse production
Problems:
Salt accumulation
Crop-specific diseases
Advantages:
Use of beneficial insects
Quality
Climate
Harvest Cucumber
Harvested unripe, ripe would be yellow
Cucumber breeding goals
Reduce temperature demand
Yield cucumber
High temp. at the beginning increases early yield, but reduces total yield
Temperature influences fruit length
3-5 fruits per plant, can be increased by adding CO2
Variety selection Cucumber
Parthenocarpic pure female bitter substance free hybrids
Powdery mildew resistant cucumber
Lower yield, as phenols have to be formed
Propagation Cucumber
Cuttings possible but poorer growth
Grafting onto fig cucumber
Seed origin is common
Alternatives to rock wool
Expanded clay, expanded shale or polyurethane
Advantages of rock wool
97% pore volume, no nutrient storage, no soil-borne diseases.
Disadvantages: Construction and disposal
Nutrients
Ca and P always separated otherwise it precipitates
Nutrient solution filtered with ozone, UV or sand
Supply must never be interrupted -> immediate drought damage
Climate Cucumber
High temperatures prematurely, but reduce total yield and accelerate ageing.
Tomato culture
The lower the T the more branched the fruit set
Cultivation objectives Lower temperature requirements
Humidity Tomato
Important between 60 and 80%.
Water supply tomato
Evenly important, otherwise bursting
Tomatoes in late autumn
Unprofitable due to decreasing yield, increasing energy and beginning imports
Greenhouse tomato
Exclusively main crop (well self-tolerant)
Fertilising tomato
Apply organic fertiliser early, wait for decomposition phase before planting, otherwise soil-borne pathogens
Fertiliser concentration
Function of irrigation frequency, root zone, substrate and soil level
Growing tomato
Initial development and yield correlate, therefore selection after germination
Context:
ID: 135
