Open AccessCausal Relationships Between Fertilizers and Yield for Winter Wheat
Author(s) -
F. Sala,
Marius Boldea,
Isidora Radulov,
F. Crista,
Adina Berbecea
Publication year - 2011
Publication title -
bulletin of university of agricultural sciences and veterinary medicine cluj-napoca. agriculture
Language(s) - English
Resource type - Journals
eISSN - 1843-5386
pISSN - 1843-5246
DOI - 10.15835/buasvmcn-agr:6461
Subject(s) - nutrient , human fertilization , nitrogen , potassium , phosphorus , winter wheat , yield (engineering) , correlation coefficient , agronomy , positive correlation , production (economics) , mathematics , zoology , environmental science , chemistry , statistics , biology , economics , medicine , materials science , macroeconomics , organic chemistry , metallurgy
The interdependence between the doses of fertilizers and the yield for winter wheat was assessed with the help of certain quantitative indicators and correlation indicators: production level, production increase per fertilization intervals, correlation coefficient, influence coefficients and capitalization of fertilizers. Nitrogen ensures wheat yields within the limits of 2562.56 – 4070.44 kg/ha, with a production increase between 508.12 and 2016 kg. The nutrients with phosphorus and potassium bring about production increase from 77.87 to 1289.48 kg by singular action or in association with nitrogen. Balanced fertilization ensures, by the synergic effect of the nutrients, a production increase between 493.61 and 2930.31 kg. At the same time, the influence coefficients of nitrogen fertilizers increase from 1.21 to 1.51, in correlation with PK. The degree of correlation of variables fertilizers – yield is high, the values R2 varying from 0.902 to 0.977.