Plant nutrient balance studies in farms of Latvia. VI. Farm Tereni, Jelgava region
2007
Lipenite, I. | Karklins, A.
The sixth article of plant nutrient balance studies in farms of Latvia is devoted to farm Tereni (see also Proc. of LLU, No 13, 16, and 17). The farm is located in the south part of Zemgale and is characterized by an intensive crop production. Using similar methodology, NPK soil surface and farm-gate balances were calculated for the period of 1999-2003. Mineral fertilizers were the main sources of nutrients. Plant nutrient input (all sources) was on average 139.2 kg of N, 28.8 kg of P2O5, and 42.1 kg of K2O per ha of agricultural land per year of the investigation period. NPK Soil surface balance was 81.8 kg of N, 3.8 kg of P2O5, and 16.9 kg of K2O. Farm-gate balance was higher for all elements: 97.2 kg N, 10.4 kg P2O5, and 22.4 kg K2O. Surplus of nutrients in barn was comparatively low (15.4 kg N, 6.6 kg P2O5, and 5.5 kg K2O) and corresponded to the difference between farm-gate and soil surface balances.
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