EP-4742139-A1 - METHOD AND SYSTEM FOR DETERMINING GAS EMISSIONS OF AGRICULTURAL PRODUCTS

EP4742139A1EP 4742139 A1EP4742139 A1EP 4742139A1EP-4742139-A1

Abstract

The present invention relates to a computer-implemented method and system for determining an agricultural product related gas emission in a geographical area, wherein the method comprises determining a geographical area, receiving soil and weather data for the determined geographical area, receiving agricultural product data, wherein receiving agricultural product data comprises receiving an agricultural product composition and an agricultural product amount, wherein determining an emission amount further comprises, generating a grid with a plurality of grid cells over the determined area, and determining for a plurality of grid cells: a soil profile, a volumetric soil water content, a water filled pore space value based on the volumetric soil water content and the soil profile, an emission factor based on the water filled pore space, an agricultural product amount, an emission amount of an agricultural product related gas based on the emission factor and the agricultural product distribution, and the method further comprising generating an emission amount of the agricultural product related gas for the determined area based on the determined emission amount for at least a portion of the grid cells.

Inventors

BARIK, Muhammad
ARAB, Mehrdad
MAHARJAN, Ganga Ram
HETTLAGE, Laurenz

Assignees

Yara International ASA

Dates

Publication Date: 20260513
Application Date: 20241111

Claims (15)

A computer-implemented method for determining an emission amount of an agricultural product related gas in a geographical area, wherein the method comprises: - determining a geographical area; - receiving soil and weather data for the determined geographical area; - receiving agricultural product data, wherein receiving agricultural product data comprises receiving an agricultural product composition and an agricultural product amount; - wherein determining an emission amount further comprises: - generating a grid with a plurality of grid cells over the determined geographical area, and determining for a plurality of grid cells: - a soil profile; - a volumetric soil water content; - a water filled pore space value based on the volumetric soil water content and the soil profile; - an emission factor based on the water filled pore space; - an agricultural product amount; - an emission amount of an agricultural product related gas based on the emission factor and the agricultural product amount; and wherein the method further comprises: -generating an emission amount of the agricultural product related gas for the determined area based on the determined emission amount for at least a portion of the grid cells.
A method according to claim 1, wherein determining a soil profile for the plurality of cells comprises generating a plurality of vertical soil layers and determining a volumetric soil water status comprises determining movement of water in the plurality of layers comprised in the plurality of grid cells.
A method according to claim 2, wherein determining an emission factor comprises determining a water filled pore space value for the top layer of the plurality of layers and the emission factor is determined based on the water filled pore space value of the top layer.
A method according to claim 1, wherein determining a volumetric soil water content comprises at least one of determining soil water movement, an evapotranspiration amount and a root water uptake.
A method according to claim 4, wherein determining an evapotranspiration amount comprises determining an evapotranspiration amount ( ET 0 ) and calibrating by means of a crop coefficient (Kc).
A method according to claim 5, wherein calibrating by means of a crop coefficient further comprises having a crop transpiration coefficient (Kcb) and a crop related soil evaporation coefficient (Ke).
A method according to claim 1, wherein receiving agricultural product data further comprises receiving at least one of agricultural product application maps and agricultural product sales data.
A method according to claim 1, wherein determining a geographical area further comprises receiving landcover classification data and defining subareas based on the landcover classification data.
A method according to claim 8, wherein determining for at least a portion of the grid cells comprises the plurality of grid cells present in the defined subareas.
A method according to claim 1, wherein the method further comprises determining at least one agricultural product application amount at at least one application timing such that an emission amount is minimized.
A method according to claim 1, wherein receiving agricultural product data comprises receiving a plurality of agricultural product compositions and agricultural product amounts, the method being further configured to determine the emission for the plurality of agricultural product compositions and product amounts.
A method according to claim 11, wherein based on the determined emission for the plurality of agricultural product compositions and product amounts, a specific product composition and corresponding product amount is determined which results in the smaller emission amount.
A data processing apparatus comprising means for carrying out the method of any one of the claims 1 to 12.
A computer-readable storage medium comprising instructions which, when executed by a computer system, cause the computer system to carry out the method of any one of the claims 1 to 12.
A computer program product comprising instructions which, when the program is executed by a computer system, cause the computer system to carry out the method of any one of the claims 1 to 12.

Description

Technical field The present disclosure relates to a method and system for determining an amount of gas emissions after application of an agricultural product in a determined area and determining mitigations options. Background Greenhouse gases have become a global concern due to their contribution to climate change and the stricter regulations introduced to reduce them. The agricultural sector represents a large contribution (nearly 12% according to a 2012 estimation) to the worldwide emissions. Nitrous oxide (N2O) is one of the dominant greenhouse gases with warming potential of 310 times of CO2. About 80% of N2O emission from anthropogenic sources originate from agricultural sources, where agricultural fields are the major contributor. Hence, N2O gas emission from management of agricultural lands is of importance and interest for all the contributors and partners along the food/product chain. Manufacturers of agricultural products for use in the farming industry are interested in quantifying emission to mitigate emission from their products. Farmers aim at reducing emission from their lands by adopting sustainable farming practices promoting resource/nutrient use efficiency for high productivity and to gain economic benefits. And actors at the receiving end of the food/product chain are interested in purchasing goods which guarantee a low footprint of greenhouse gas emissions so that their final customers are satisfied. Until now, many approaches have been attempted in quantification of N2O gas emission from agricultural fields due to N fertilizer application, but uncertainties remain due to difficulties in the quantification process. An emission factor guideline was established by the Intergovernmental Panel on Climate Change (IPCC) in 2006, which accounts N2O emission as 1% of total N applied in the field. Such an approximated value is neither accurate enough nor does it represent the variability present on the field due to different local conditions like weather, soil and fertilizer distribution. Hence, it is the aim of the current disclosure to determine a method which tackles the above-mentioned challenges and solves the disadvantages of the existing methodologies. The approaches described in this section are approaches that could be pursued, but not necessarily approaches that have been previously conceived or pursued. Therefore, unless otherwise indicated, it should not be assumed that any of the approaches described in this section qualify as prior art merely by virtue of their inclusion in this section. Summary According to a first aspect of the present disclosure, this and other objectives are achieved by a computer-implemented method for determining an emission amount of an agricultural product related gas in a geographical area, wherein the method comprises determining a geographical area; receiving soil and weather data for the determined geographical area; receiving agricultural product data, wherein receiving agricultural product data comprises receiving an agricultural product composition and an agricultural product amount; wherein determining an emission amount further comprises: generating a grid with a plurality of grid cells over the determined geographical area, and determining for a plurality of grid cells a soil profile; a volumetric soil water content; a water filled pore space value based on the volumetric soil water content and the soil profile; an emission factor based on the water filled pore space; an agricultural product amount; an emission amount of an agricultural product related gas based on the emission factor and the agricultural product amount; and wherein the method further comprises generating an emission amount of the agricultural product related gas for the determined area based on the determined emission amount for at least a portion of the grid cells. Following this approach, an improved and more accurate emission amount of an agricultural product can be determined. According to a second aspect of the current disclosure, determining a soil profile for the plurality of cells comprises generating a plurality of vertical soil layers and determining a volumetric soil water status comprises determining movement of water in the plurality of layers comprised in the plurality of grid cells. Following this approach, water movements in soil can be accounted for. According to a third aspect of the current disclosure, determining an emission factor comprises determining a water filled pore space value for the top layer of the plurality of layers and the emission factor is determined based on the water filled pore space value of the top layer. Following this approach, the determination of the emission factor is improved. According to a further aspect of the current disclosure, determining a volumetric soil water content comprises at least one of determining soil water movement, an evapotranspiration amount and a root water uptake. Following this approach, the volumetric soil w