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PRODUCTION, ECONOMIC AND ENERGY EFFECTIVENESS OF WINTER BARLEY CROPPING AT VARIOUS RATES OF NITROGEN FERTILISATION
winter barley production and economic effectiveness nitrogen fertilisation
2009/3/30
Nitrogen fertilisation is one of the most effective yield-increasing factors but also one of the most critical items of cereal production costs. The aim of the present study was an attempt at definin...
Phosphorus status of diverse soils in Finland as influenced by long-term P fertilisation 2.Changes of soil test values in relation to P balance with references to incorporation depth of residual and freshly applied P
Acetate extractable P Olsen P sampling depth total P water extractable P
2010/8/13
Fertilising with phosphorus (P) ensures continuous supply of an essential growth factor as necessary for productive and sustainable agriculture. The amounts of P required to attain and maintain an ade...
Phosphorus status of diverse soils in Finland as influenced by long-term P fertilisation I.Native and previously applied P at 24 experimental sites
Acetate method phosphorus Olsen P P saturation index secondary inorganic P total P water extractable P
2010/8/13
The native reserves of phosphorus (P) in Finnish soils are sizeable but poorly available to plants. The P status has been generally poor, but large rates of P applied since the 1940s have substantiall...