General Nutrient Principles

soil supply + fert
1. plant nutrient requirement
crop requirement - soil supply
1. fert required
potential yield x nutrient content
1. crop requirement
80% of OSR received sulphur last year
1. E-on state that desulphurisation towers reduce SO2 emissions by 92%
  1. hence reduce natural soil levels
RB209 not enforced but states best practice
assess crop requirements
assess nutrient supply from soil
1. every 4 years
2. SNS annually
3. allow for nutrients from FYM
only apply what is needed
ensure nutrient losses are minimised
1. lost profit
2. more pollution
difference between maximum and optimum
FACTS
1. learn RB209
2. FQA - professionally liable
sustainable use directive
Fert use survey every march
1. British Survey of Fertiliser practice 2011
2. Approx 100kg/ha of N
  1. N use in grass has decreased
    1. economic
    2. more efficient
    3. area reduction
    4. increase in manure use
3. P and K decrease
  1. on grassland and arable

Zusammenfassung der Ressource

	Erstellt von labradorlass vor mehr als 11 Jahre