It pollutes the environment with pesticides, fertilisers and nutrients from feed and animal waste.
Table 5 The influence of fertiliser on needle nutrient concentration at age 10 years across all five sites of the first trial series established in 1971 Nutrient in needles First rotation (F1R) Second rotation (F2R) No fertiliser Fertiliser Statistical significance of F-test No fertiliser Fertiliser Statistical significance of F-test Nitrogen 1.87 1.81 n.s.s
Mineral fertiliser provides maximum nutrient supply to the crops and the PPPs are used to tackle harmful bacteria and fungi, harmful animal organisms, and undesirable weeds.
The response to fertilisation can be either type 1 or type 2, depending on the amount of fertiliser and the nutrient deficiency of the site (Snowdon 2002).
If adding new fertiliser to an existing nutrient solution, be aware that you will also be adding more micro nutrients/trace elements as well.
Inorganic fertiliser just replaced natural nutrients, and more efficiently than manure.
In Africa, where many soils have become badly depleted of nutrients, better fertiliser management would go a long way.
Increase in N application rate increased TE at the vegetative phase for fast nutrient releasing fertilisers (DFS, ECO, EC, NPK + (NH4 2SO4, (NH4 2SO4) and at the reproductive phase for slow nutrient releasing fertilisers (C and CO).
At each site, a factorial design was applied with the following three factors: species (Pinus radiata and Cupressus lusitanica), fertiliser (no fertiliser and nutrients supplied in excess of crop demands) and disturbance (low and high disturbances).
The plots at each site were arranged in a factorial design with the following three factors: species (Pinus radiata D. Don and Cupressus lusitanica Mill)., fertiliser (no fertiliser and nutrients supplied in excess of crop demands) and disturbance (low and high disturbance).
