def Inequal2_rule(model):
    temp=0
    for x in model.method:
        for y in model.crop:
            temp=temp+model.const1[x, y]*model.Amount[x, y]
    return temp >= 200
model.Inequal2 = Constraint(rule=Inequal2_rule)

def Inequal3_rule(model):
    temp=0
    for x in model.method:
        for y in model.crop:
            temp=temp+model.const2[x, y]*model.Amount[x, y]
    return temp >= 240
model.Inequal3 = Constraint(rule=Inequal3_rule)

param : const1 :=
1  1  2.5
1  2  0
1  3  0
1  4  0
2  1  -1
2  2  0
2  3  0
2  4  0
3  1  1
3  2  0
3  3  0
3  4  0
;

param : const2 :=
1  1  0
1  2  3
1  3  0
1  4  0
2  1  0
2  2  -1
2  3  0
2  4  0
3  1  0
3  2  1
3  3  0
3  4  0
;