Maize_Yield_Prediction_Whispers2022

Supplemental Material for MAIZE YIELD PREDICTION BASED ON MULTI-MODALITY REMOTE SENSING AND LSTM MODELS IN NITROGEN MANAGEMENT PRACTICE TRIALS

Table Hyperspectral Indices Extracted

No.	Hyperspectal Index	Formula	Name
1	NDVI705	$\LARGE\frac{\rho_{750}-\rho_{705}}{\rho_{750}+\rho_{705}}$	Red Edge Normalized Difference Vegetation Index 1
2	mNDVI705	$\LARGE\frac{\rho_{750}-\rho_{705}}{\rho_{750}+\rho_{705}-2\rho_{445}}$	Modified Red Edge Normalized Difference Vegetation Index. 1
3	mSR705	$\LARGE\frac{\rho_{750}-\rho_{445}}{\rho_{705}-\rho_{445}}$	Modified Red Edge Simple Ratio Index 2
4	GNDVI	$\LARGE\frac{\rho_{750}-\rho_{550}}{\rho_{750}+\rho_{550}}$	Green Difference Vegetation Index 2
5	RNDVI	$\LARGE\frac{\rho_{800}-\rho_{670}}{\rho_{800}+\rho_{670}}$	Relative Normalized Difference Vegetation Index 3
6	NDCI	$\LARGE\frac{\rho_{762}-\rho_{527}}{\rho_{762}+\rho_{527}}$	Normalized Difference Chlorophyll Index 4
7	Datt1	$\LARGE\frac{\rho_{850}-\rho_{710}}{\rho_{850}-\rho_{680}}$	Datt Water Content Index 5
8	Datt2	$\LARGE\frac{\rho_{850}}{\rho_{710}}$	Datt Water Content Index 5
9	Datt3	$\LARGE\frac{\rho_{754}}{\rho_{704}}$	Datt Water Content Index 5
10	Carte1	$\LARGE\frac{\rho_{695}}{\rho_{420}}$	Carte Ratios of Leaf Reflectance 6
11	Carte2	$\LARGE\frac{\rho_{695}}{\rho_{760}}$	Carte Ratios of Leaf Reflectance 6
12	Carte3	$\LARGE\frac{\rho_{605}}{\rho_{760}}$	Carte Ratios of Leaf Reflectance 6
13	Carte4	$\LARGE\frac{\rho_{710}}{\rho_{760}}$	Carte Ratios of Leaf Reflectance 6
14	Carte5	$\LARGE\frac{\rho_{695}}{\rho_{670}}$	Carte Ratios of Leaf Reflectance 6
15	SR800680	$\LARGE\frac{\rho_{800}}{\rho_{680}}$	Simple Band Ratio 7
16	SR675700	$\LARGE\frac{\rho_{675}}{\rho_{700}}$	Simple Band Ratio 7
17	SR700670	$\LARGE\frac{\rho_{700}}{\rho_{670}}$	Simple Band Ratio 7
18	SR750700	$\LARGE\frac{\rho_{750}}{\rho_{700}}$	Simple Band Ratio 7
19	SR752690	$\LARGE\frac{\rho_{752}}{\rho_{690}}$	Simple Band Ratio 7
20	SR750550	$\LARGE\frac{\rho_{750}}{\rho_{550}}$	Simple Band Ratio 7
21	SR750710	$\LARGE\frac{\rho_{750}}{\rho_{710}}$	Simple Band Ratio 7
22	NVI	$\LARGE\frac{\rho_{777}-\rho_{747}}{\rho_{673}}$	Normalized Vegetation Index 8
23	EVI	$\LARGE\frac{2.5(\rho_{800}-\rho_{670})}{\rho_{800}+6\rho_{670}+7.5\rho_{475}+1}$	Enhanced Vegetation Index 9
24	OSAVI	$\LARGE\frac{1.16(\rho_{800}-\rho_{670})}{0.16+\rho_{800}+\rho_{670}}$	Optimized Soil-Adjusted Vegetation Index 10
25	OSAVI2	$\LARGE\frac{1.16(\rho_{750}-\rho_{705})}{0.16+\rho_{750}+\rho_{705}}$	Optimized Soil-Adjusted Vegetation Index 10
26	TCARI	$\large 0.5+3[(\rho_{700}-\rho_{670})-0.2(\rho_{700}-\rho_{550})*(\frac{\rho_{700}}{\rho_{670}})]$	Transformed Chlorophyll Absorption in Reflectance 11
27	TCARI2	$\large 3[(\rho_{750}-\rho_{705})- 0.2(\rho_{750}-\rho_{550})*(\frac{\rho_{750}}{\rho_{705}})]$	Transformed Chlorophyll Absorption in Reflectance 11
28	MCARI	$\large 4[(\rho_{700}-\rho_{670})-0.2(\rho_{700}-\rho_{550})]*(\frac{\rho_{700}}{\rho_{670}})$	Modified Chlorophyll Absorption in Reflectance Index 12
29	TVI	$\large 0.5[120(\rho_{750}-\rho_{550})-2.5(\rho_{670}-\rho_{550})]$	Triangular Vegetation Index 13
30	SPVI	$\large 0.4*3.7(\rho_{800}-\rho_{670})-1.2\mid\rho_{530}-\rho_{670}\mid$	Spectral Polygon Vegetation Index 14
31	REP	$\large 700+40*[\frac{(\rho_{670}-\rho_{780})}{2}-\frac{(\rho_{700}}{\rho_{740}-\rho_{700}})]$	Red Edge Position Index 15
32	PRI	$\LARGE\frac{\rho_{531}-\rho_{570}}{\rho_{531}+\rho_{570}}$	Photochemical Reflectance Index [16]
33	RI1db	$\LARGE\frac{\rho_{735}}{\rho_{720}}$	Ratio Index 16
34	VOG1	$\LARGE\frac{\rho_{740}}{\rho_{720}}$	Vogelmann Red Edge Index 17
35	VOG2	$\LARGE\frac{\rho_{734}-\rho_{747}}{\rho_{715}+\rho_{726}} $	Vogelmann Red Edge Index 17
36	VOG3	$\LARGE\frac{\rho_{734}-\rho_{747}}{\rho_{715}+\rho_{720}} $	Vogelmann Red Edge Index 17
37	RDVI	$\LARGE\frac{\rho_{800}-\rho_{670}}{\sqrt{\rho_{800}+\rho_{670}}}$	Renormalized Difference Vegetation Index 18
38	MSAVI	$\large 0.5[2(\rho_{800}+1-\sqrt{(2\rho_{800}+1)^2}-1.2\mid\rho_{530}-\rho_{670}\mid] $	Modified Soil Adjusted Vegetation Index 19
39	MCARI2	$\large [(\rho_{750}-\rho_{705})-0.2(\rho_{700}-\rho_{550})]*(\frac{\rho_{750}}{\rho_{705}})$	Modified Chlorophyll Absorption in Reflectance Index 12
40	MCARI2/OSAVI2	$\large\frac{MCARI2}{OSAVI2}$	MCARI2/OSAVI2 20
41	PSRI	$\LARGE\frac{\rho_{678}-\rho_{500}}{\rho_{750}}$	Plant Senescence Reflectance Index 21
42	HBSI1	$\LARGE\frac{\rho_{855}-\rho_{682}}{\rho_{855}+\rho_{682}}$	Hyperspectral Biomass and Structural Index 22
43	HBSI2	$\LARGE\frac{\rho_{910}-\rho_{682}}{\rho_{910}+\rho_{682}}$	Hyperspectral Biomass and Structural Index 22
44	HBSI3	$\LARGE\frac{\rho_{550}-\rho_{682}}{\rho_{550}+\rho_{682}}$	Hyperspectral Biomass and Structural Index 22
45	DCNI	$\LARGE\frac{(\rho_{720}-\rho_{700})*(\rho_{700}-\rho_{670})}{\rho_{720}-\rho_{670}+0.03}$	Double-peak Canopy Nitrogen Index 23
46	HBCI8	$\LARGE\frac{\rho_{550}-\rho_{515}}{\rho_{550}+\rho_{515}}$	Hyperspectral Biochemical Indices 22
47	HBCI9	$\LARGE\frac{\rho_{550}-\rho_{490}}{\rho_{550}+\rho_{490}}$	Hyperspectral Biochemical Indices 22
48	HREI15	$\LARGE\frac{\rho_{855}-\rho_{720}}{\rho_{855}+\rho_{720}}$	Hyperspectral Red Edge Indices 22
49	HREI16	$\LARGE\frac{\rho_{910}-\rho_{705}}{\rho_{910}+\rho_{705}}$	Hyperspectral Red Edge Indices 22
50	NDRE	$\LARGE\frac{\rho_{790}-\rho_{720}}{\rho_{790}+\rho_{720}}$	Normalized Difference Vegetation Indexes 24

SHAP Feature Importance in each time-step

References

Footnotes

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