Library of Yield Prediction
EquationsWheat: INSEY = (NDVI / days from planting to sensing where GDD>0)
Corn: NDVI/ cumulative GDD
| Condition | Crop | Year | Equation | Units | plus 1 SD | Yrs | Locations | RI Adjustment Equation |
| Dryland | Winter Wheat | 2002 | YP0=344*EXP(INSEY*267.65) | kg/ha | yes | 4 | 22 | |
| Dryland | Winter Wheat | 2003 | YP0=500*EXP(INSEY*267.65) | kg/ha | yes | 5 | 26 | |
| Dryland | Winter Wheat | 2004 | YP0=359*EXP(INSEY*324.4) | kg/ha | yes | 6 | 30 | |
| Dryland | Winter Wheat | 2005 | YP0=522*EXP(INSEY*274.7) | kg/ha | yes | 7 | 34 | RI Harvest = 1.69(RI-NDVI) -0.70 |
| Dryland | Winter Wheat | 2006 | YP0=532*EXP(INSEY*270.1) | kg/ha | yes | 8 | 38 | RI Harvest = 1.69(RI-NDVI) -0.70 |
| Dryland | Winter Wheat | 2007 | YP0=590*EXP(INSEY*258.2) | kg/ha | yes | 9 | 43 | RI Harvest = 1.69(RI-NDVI) -0.70 |
| Dryland | Winter Wheat | 2007 Mod |
CoefA = 0.383516x2 - 91.989634x + 6214.147063 CoefB = -0.000423x2 + 0.099424x - 3.746111 YP0 = (CoefA * EXP (CoefB * NDVI)) |
kg/ha | yes | 10 | RI Harvest = 1.69(RI-NDVI) -0.70 | |
| Dryland | Winter Wheat-Forage | 2007 | YP0 = 159.57*EXP(3.909*NDVI) | kg/ha | yes | 6 | ||
| Dryland & Irrigated | Durum Wheat | 2006 | YP0=322*EXP(INSEY*211.5) | kg/ha | yes | 2 | 4 | RI Harvest = 1.69(RI-NDVI) -0.70 |
| Dryland & Irrigated | Durum Wheat (for increased protein) | 2006 | YP0=322*EXP(INSEY*211.5)* | kg/ha | yes | 2 | 4 | |
| *apply 20 kg N/ha when projected yield exceeds 4000 kg/ha | ||||||||
| Rainfed | Wheat-Southern Australia, David Cox | 2006 | YP0=1800*EXP(INSEY*85) | kg/ha | no | 1 | 1 | RI Harvest = 1.69(RI-NDVI) -0.70 |
| Rainfed | Wheat, E. Australia, R. Heath | 2006 | YP0=580*EXP(INSEY*244.94) | kg/ha | no | 1 | 1 | RI Harvest = 1.69(RI-NDVI) -0.70 |
| Irrigated | Corn | 2003 | YP0=2332.9*(EXP(INSEY*132.46) | kg/ha | ||||
| Dryland | Corn | 2003 | YP0=1633*(EXP(INSEY*132.46) | kg/ha | ||||
| Dryland & Irrigated | Corn | 2004 | YP0=1565*(EXP(INSEY*154.7) | kg/ha | yes | 3 | 7 | RI Harvest = 1.64(RI-NDVI) - 0.5287 |
| Rainfed | Corn (1st planting, Argentina) | 2005 | YP0=1941*(EXP(INSEY*162) | kg/ha | yes | 3 | RI Harvest = 1.64(RI-NDVI)-0.5287 | |
| Irrigated | Corn (2nd planting, Argentina) | 2005 | YP0=624*(EXP(INSEY*149.41) | kg/ha | yes | |||
| Rainfed | Corn (USA) | 2006 | YP0=1202*(EXP(INSEY*169.6) | kg/ha | yes | 4 | 15 | RI Harvest = 1.64(RI-NDVI)-0.5287 |
| Irrigated/Rainfed | Corn USA, Cummulative GDD | 2007 | YP0=2592*(EXP(NDVI/Sum of GDD*1775.6) | kg/ha | RI Harvest = 1.64(RI NDVI) -0.5287 | |||
| Rainfed | Corn Ohio | 2008 | YP0=1287*(EXP(NDVI/Sum of GDD*2655) | kg/ha | 3 | RI Harvest = 1.64(RI NDVI) -0.5287 | ||
| Irrigated/Rainfed | Corn (USA) Using days from planting to Sensing | 2007 |
CoefA = 11.777*(days*days) - 1485.4*(days)+48533 CoefB = -0.0008(days*days) + 0.1402*(days)-3.3851 YP0 = (CoefA * EXP (CoefB * NDVI)) days = days from planting to sensing |
kg/ha | yes | 5 | a lot | RI Harvest = 1.64(RI NDVI) -0.5287 |
| Irrigated/Rainfed | Corn (USA) Using Cumulative GDD | 2007 |
CoefA=641.4158203057011+4207.148880805758/(1.0+EXP(-(x-897.0822110817790)/(-32.78891349907328))) CoefB=1.46923333343772+1.8752166665474/(1+EXP(-(x-912.164821648278)/2.66689327528455)) |
kg/ha | yes | 5 | a lot | RI Harvest = 1.64(RI NDVI) -0.5287 |
|
This algorithm uses cummulative GDD, where GDD are expressed in °F |
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| Rainfed | Sorghum | 2005 | YP0=72*(EXP(INSEY*296.2) | kg/ha | yes | 2 | 4 | none |
| Sorghum KSU-OSU | 2006 | YP0=633*(EXP(INSEY*141.94) | ||||||
| Sorghum KSU | 2007 update | YP0=58.689*(EXP(INSEY*273.47) | kg/ha | yes | RI-Harvest=2.104*RI NDVI -1.044 | |||
| Irrigated | Spring Wheat Mexico | 2003 | YP0=701*EXP(INSEY*154.91) | kg/ha | yes | 3 | 6 | |
| Irrigated | Spring Wheat Mexico | 2006 | YP0=989*EXP(INSEY*130.65) | kg/ha | yes | 4 | 11 | |
| Irrigated |
Spring Wheat Mexico (Melgas) |
2007 | YP0=1250*EXP(INSEY*106.12) | kg/ha | yes | 6 | 15 | |
| Rainfed | Spring Wheat INDIA (67-73 days after planting) | 2006 | YP0=838*EXP(INSEY*177.12) | kg/ha | yes | 2 | 6 | |
| Rainfed |
Spring Wheat Argentina |
2007 | YP0=680,547*EXP(NDVI*2701) NDVI a inicios de encaņazon | kg/ha | yes | |||
| Dryland | Spring Wheat Canada | 2005 | YP0 = 1659*(exp(732.72*INSEY)) | kg/ha | yes | 1 | ||
| Dryland |
Spring Wheat Canada |
2008 | YP0 = 996.3*(exp(1779*INSEY)) INSEY = NDVI/sum of GDD in F | kg/ha | yes | 5 | RI Harvest = 1.69(RI-NDVI) -0.70 | |
| Dryland | Bermudagrass | 2006 | YP0 = 728.8*(exp(639.5*(INSEY)) | kg/ha | yes | 4 | 2 | none |
| Dryland | Canola Canada | 2005 | YP0=1408.3*exp(744.61*INSEY) | kg/ha | yes | 1 | ||
| Dryland | Canola Canada | 2008 | YP0=885.7*exp(881.5*INSEY), INSEY = NDVI/sum of GDD | kg/ha | yes | 2 | RI-Harvest=1.69*RI-NDVI - 0.7 | |
| Rainfed | Rice INDIA (64-28 days after planting) | |||||||