A MATHEMATICA L MODEL TO DETERMINE OPTIMAL DOSES OF QUANTITATIVELY LIMITED CHEMICAL FERTILISERS

F. Sala, M. Boldea, C. Anghel, Isidora Radulov

Abstract


Starting from the differential equation (1)) and solving it results in academic dependence of yield on a single fertiliser (relation 2). Generalising in two variables we get the relation (4). We determine the constants of the initial conditions and compare with experimental data (Fig. 1 – Fig. 4). We determine the optimal solutions for the different values of the sum of the two fertilisers (N and P); results (table 2 and fig. 5.) facilitate the reading of the optimal shares of quantitatively limited fertiliser doses.

Keywords


chemical fertilisers; optimal doses; mathematical model

Full Text:

PDF


DOI: http://dx.doi.org/10.15835/buasvmcn-agr:1317


University of Agricultural Sciences and Veterinary Medicine
3-5 Manastur St., 400372 Cluj-Napoca
Romania
Tel: +40-264-596.384 | Fax: +40-264-593.792 
biroupublicatii@usamvcluj.ro