| In this paper, based on the datum of soil testing and fertilizer project, field plot experiments were conducted to compare treatments of gross formula, minor adjustment and farmers practice on rice yield, partial factor productivity of applied nitrogen and economic benefit. The results showed that, compared with the farmers practice, rice yield and partial factor productivity of applied nitrogen was increased with treatments of gross formula and minor adjustment, which was 4.67% and 11.85%, 33.45% and 42.62%,respectively. Treatments of gross formula and minor adjustment could not only realize the objective of increasing rice yield and saving the cost, but also in prove partial factor productivity of applied nitrogen, of which the treatment of minor adjustment was better than gross formula. |
