Crop Rotation in sustainable farming - Revision history

Simm04 at 17:06, 26 January 2020

2020-01-26T17:06:48Z

Simm04 at 17:04, 26 January 2020

2020-01-26T17:04:22Z

Simm04 at 16:39, 26 January 2020

2020-01-26T16:39:25Z

Simm04 at 16:09, 26 January 2020

2020-01-26T16:09:54Z

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Simm04 at 15:21, 26 January 2020

2020-01-26T15:21:36Z

Simm04 at 14:55, 26 January 2020

2020-01-26T14:55:14Z

Simm04 at 14:45, 26 January 2020

2020-01-26T14:45:41Z

Simm04 at 14:43, 26 January 2020

2020-01-26T14:43:56Z

Simm04: Created page with "=Problem definition= =Method= =Model= =Results= =Conclusion= =Code= =References="

2020-01-23T14:41:07Z

Created page with "=Problem definition= =Method= =Model= =Results= =Conclusion= =Code= =References="

New page

=Problem definition=

=Method=

=Model=

=Results=

=Conclusion=

=Code=

=References=

@@ Line 299: / Line 299: @@
 Detailed description of parameteres like Temperature, Pests, Natural disasters or Precipitation.
 More crop strategies or new crops.
 Market variables like demand or prices of crop seeds or harvesting costs could be also implemented.
 Monthly changes (instead of yearly) with more detailed fluctuations during seasons (in Spring there is bigger demand for fertilizers, temperature spikes)

@@ Line 284: / Line 284: @@
 =Conclusion=
 =Code=
@@ Line 292: / Line 310: @@
 #BEHNKE, Gevan D., Stacy M. ZUBER, Cameron M. PITTELKOW, Emerson D. NAFZIGER a María B. VILLAMIL. Long-term crop rotation and tillage effects on soil greenhouse gas emissions and crop production in Illinois, USA. Agriculture, Ecosystems & Environment [online]. 2018, 261, 62-70 [cit. 2020-01-26]. DOI: 10.1016/j.agee.2018.03.007. ISSN 01678809. Availiable: https://linkinghub.elsevier.com/retrieve/pii/S0167880918301221
+#KOLLAS, Chris, Kurt Christian KERSEBAUM, Claas NENDEL, et al. Crop rotation modelling—A European model intercomparison. European Journal of Agronomy [online]. 2015, 70, 98-111 [cit. 2020-01-26]. DOI: 10.1016/j.eja.2015.06.007. ISSN 11610301. Availiable: https://linkinghub.elsevier.com/retrieve/pii/S1161030115300010
+#BRANKATSCHK, Gerhard a Matthias FINKBEINER. Modeling crop rotation in agricultural LCAs — Challenges and potential solutions. Agricultural Systems [online]. 2015, 138, 66-76 [cit. 2020-01-26]. DOI: 10.1016/j.agsy.2015.05.008. ISSN 0308521X. Availiable: https://linkinghub.elsevier.com/retrieve/pii/S0308521X1500075X

@@ Line 231: / Line 231: @@
 ===Yields===
-[[File:CCC yield.png]]
+CCC Yield
-[[File:CS yield.png]]
+CS Yield
-[[File:SSS yield.png]]
+SSS Yield
 ===N2O and CO2 emissions===
-[[File:CCC N2O CO2.png]]
+CCC N2O CO2
-[[File:CS N2O CO2.png]]
+CS N2O CO2
-[[File:SSS N2O CO2.png]]
+SSS N2O CO2
-[[File:CSW N2O CO2.png]]
+CSW N2O CO2
 ===CH4 emissions===
-[[File:CCC CH4.png]]
+CCC CH4
-[[File:CS CH4.png]]
+CS CH4
-[[File:SSS CH4.png]]
+SSS CH4
-[[File:CSW CH4.png]]
+CSW CH4
 ===Soil nitrogen===
-[[File:CCC soil nitrogen.png]]
+CCC soil nitrogen
-[[File:CS soil nitrogen.png]]
+CS soil nitrogen
-[[File:SSS soil nitrogen.png]]
+SSS soil nitrogen
-[[File:CSW soil nitrogen.png]]
+CSW soil nitrogen
 =Conclusion=
 =Code=
 =References=

@@ Line 14: / Line 14: @@
 '''CSW''' (corn-soybean-wheat) - rotation of corn, soybean and wheat will be used in year cycles for the whole observed time period (40 years), first year corn, second year soybean, third year wheat, repeat..
-Goal of this simulation is to observe dynamic changes with yields, greenhouse gas emissions and soil nitrogen levels, while changing different crop rotation strategies.
+Goal of this simulation is to observe dynamic changes with yields, greenhouse gas emissions, tillage strategy and soil nitrogen levels, while changing different crop rotation strategies.
 =Method=
@@ Line 35: / Line 35: @@
 ===Corn production===
 =Corn quantity*PULSE TRAIN(0, 1 , Number of rotated crops ,40)
 ===Soybean production===
-	Soybean quantity*PULSE TRAIN(IF THEN ELSE(Number of rotated crops=1, 0 , 1 ), 1 , Number of rotated crops , 40 )
+''Similar case as in Corn production variable only with difference of initial year, if sobyean is present in crop rotation strategy, it is always second crop, therefore it starts at time 1 (second year). In case of SSS strategy it starts at time 0 (first year)''
 ===Wheat production===
-	Wheat quantity*PULSE TRAIN(IF THEN ELSE(Number of rotated crops=1, 0 , 2 ), 1 , Number of rotated crops , 40 )
+''Similar case as in Corn production variable only with difference of initial year, if wheat is present in crop rotation strategy, it is always third crop, therefore it starts at time 2 (third year).''
 ===Corn quantity===
-	<0,100>
+''Input constant variable which can be changed based on crop strategy. Range <0,100>.''
 ===Soybean quantity===
-	<0,40>
+''Input constant variable which can be changed based on crop strategy. Range <0,40>.''
 ===Wheat quantity===
-	<0,80>
+''Input constant variable which can be changed based on crop strategy. Range <0,80>.''
 ===increase of N2O emissions===
 ===increase of CO2 emissions===
 ===increase of CH4 emissions===
 ===Cumulative N2O emissions===
 ===Cumulative CO2 emissions===
@@ Line 81: / Line 119: @@
 ===Wheat yield===
 ===Total yield===
-= Corn yield + Soybean yield + Wheat yield
+=Corn yield + Soybean yield + Wheat yield
 =Results=

@@ Line 24: / Line 24: @@
 == Variables ==
-'''Number of rotated crops'''
-	''<1,3>''
+===Number of rotated crops===
-Corn production
+''Input constant variable which can be changed based on crop strategy. Range <1,3>.''
 Corn quantity*PULSE TRAIN(0, 1 , Number of rotated crops ,40)
-Soybean production
+=1 (in case of CCC and SSS strategies)
 	Soybean quantity*PULSE TRAIN(IF THEN ELSE(Number of rotated crops=1, 0 , 1 ), 1 , Number of rotated crops , 40 )
 Wheat production
 	Wheat quantity*PULSE TRAIN(IF THEN ELSE(Number of rotated crops=1, 0 , 2 ), 1 , Number of rotated crops , 40 )
 Corn quantity
 	<0,100>
-Soybean quantity
+===Soybean quantity===
 	<0,40>
-Wheat quantity
+===Wheat quantity===
 	<0,80>
-increase of N2O emissions
+===increase of N2O emissions===
-increase of CO2 emissions
+===increase of CO2 emissions===
-increase of CH4 emissions
+===increase of CH4 emissions===
-Cumulative N2O emissions
+===Cumulative N2O emissions===
-Cumulative CO2 emissions
+===Cumulative CO2 emissions===
-Cumulative CH4 emissions
+===Cumulative CH4 emissions===
-Corn N2O emission coef
+===Corn N2O emission coef===
-Soybean N2O emission coef
+===Soybean N2O emission coef===
-Wheat N2O emission coef
+===Wheat N2O emission coef===
-Corn CO2 emission coef
+===Corn CO2 emission coef===
-Soybean CO2 emission coef
+===Soybean CO2 emission coef===
-Wheat CO2 emission coef
+===Wheat CO2 emission coef===
-Corn CH4 emission coef
+===Corn CH4 emission coef===
-Soybean CH4 emission coef
+===Soybean CH4 emission coef===
-Wheat CH4 emission coef
+===Wheat CH4 emission coef===
-Inorganic fertilizer
+===Inorganic fertilizer===
-Soil nitrogen
+===Soil nitrogen===
-increase of soil N
+===increase of soil N===
-decrease of soil N
+===decrease of soil N===
-Soil nitrogen level
+===Soil nitrogen level===
-Temperature
+===Temperature===
-Precipitation
+===Precipitation===
-Pests
+===Pests===
-Tillage
+===Tillage===
-Natural disasters
+===Natural disasters===
-increase of C yield
+===increase of C yield===
-increase of S yield
+===increase of S yield===
-increase of W yield
+===increase of W yield===
-Corn yield
+===Corn yield===
-Soybean yield
+===Soybean yield===
-Wheat yield
+===Wheat yield===
-Total yield = Corn yield + Soybean yield + Wheat yield
+===Total yield===
 =Results=

@@ Line 6: / Line 6: @@
 I will focus on four crop rotation strategies with three different crops - corn, soybean, wheat:
-''CCC'' (continuous corn) - only corn will be farmed for the whole observed time period (40 years)
+'''CCC''' (continuous corn) - only corn will be farmed for the whole observed time period (40 years)
-''CS'' (corn-soybean) - rotation of corn and soybean will be used in year cycles for the whole observed time period (40 years), first year corn, second year soybean, repeat..
+'''CS''' (corn-soybean) - rotation of corn and soybean will be used in year cycles for the whole observed time period (40 years), first year corn, second year soybean, repeat..
-''SSS'' (continuous soybean) - only soybean will be farmed for the whole observed time period (40 years)
+'''SSS''' (continuous soybean) - only soybean will be farmed for the whole observed time period (40 years)
-''CSW'' (corn-soybean-wheat) - rotation of corn, soybean and wheat will be used in year cycles for the whole observed time period (40 years), first year corn, second year soybean, third year wheat repeat..
+'''CSW''' (corn-soybean-wheat) - rotation of corn, soybean and wheat will be used in year cycles for the whole observed time period (40 years), first year corn, second year soybean, third year wheat, repeat..
 Goal of this simulation is to observe dynamic changes with yields, greenhouse gas emissions and soil nitrogen levels, while changing different crop rotation strategies.