US 6,205,707 B1Granted

Method for the fertilization of soil for cultivated plants

AssigneeSuomen Rehu Oy

InventorJuha Salopelto

Life of this patent

Estimating the term…

Loading patent…

Abstract

A method for the fertilization of soil for cultivated plants, whereby nitrogen fertilizer is spread over the cultivated area in conjunction with the sowing of cultivated plants and later during the growing season more fertilizer is spread over the cultivated area. In this method, a basic amount of fertilizer corresponding to a basic crop smaller than the maximum crop is spread over the cultivated area in conjunction with the sowing; a supplementary amount or fertilizer is spread on a limited area; the growth that has taken place in the cultivated area and in the area with supplementary fertilization during a certain time since the beginning of the growing season is measured; the measured growth that has taken place in the cultivated area is compared with the measured growth of the plants that has taken place in the area with supplementary fertilization in the same growing conditions, and, if the growth in the area with supplementary fertilization exceeds the growth in the cultivated area, supplementary fertilization is carried out in the cultivated area, corresponding to the growth of the plants in the area with supplementary fertilization as compared with the growth of the plants in the cultivated area and to the amount of fertilizer used in the cultivated area.

Claims12

Dependent claims

A method for fertilizing soil for a cultivated plant crop having a maximum crop yield, comprising:

spreading a first amount of fertilizer over a first area while sowing seeds for the cultivated plant crop in the first area, the first amount of fertilizer corresponding to a basic crop yield of the cultivated plant crop, the first amount of fertilizer being smaller than a reference amount of fertilizer corresponding to the maximum crop yield;
spreading a second amount of the fertilizer on a second area different from the first area, at a time of sowing seeds for the cultivated plant crop in the second area, the second amount of fertilizer being larger than the first amount of fertilizer;
determining growth of the cultivated plant crop in the first area and in the second area after a growing season has begun;
comparing the growth in the first area with the growth in the second area;
calculating a crop forecast yield during a growing season, based on a heat summation accumulated since sowing;
determining a supplementary amount of fertilizer for the first area, if the growth in the second area exceeds the growth in the first area, from the growths in the first and second areas, from the first amount of fertilizer used in the first area and from a difference between the basic crop yield and the crop forecast yield;
and
spreading the supplementary amount of fertilizer in the first area.

5 more elements

Dependencies are inferred from the claim text.