Cultivating Diversity: Field Scattering as Agricultural Risk Management in Cuyo Cuyo, Department of Puno, Peru

Table 8.1
Net Yields per Hectare for Five Crops, by Community and Year - Monocrops and Polycrops Combined

(with statistical comparison of differences between years and community)

(page 272)

Community/ Year Potato
(kg/ha)		 Oca
(kg/ha)		 Illaco
(kg/ha)		 Isaño
(kg/ha)		 Habas
(kg/ha)

Ura Ayllu

1985-86

N 43 41 16 5 7
Mean 10070 6871 5204 10232 69
S.D. 7618 7660 5710 9260 182

1986-87

N 74 35 13 3 44
Mean 8282 9110 7411 284 1286
S.D. 7450 8544 6461 493 1343
------ ------ ------ ------ ------ ------
T-stat 1.241 -1.204 0.9762 2.3962 N/A

Both Years

N 118 76 29 8 51
Mean 8872 7902 6193 6501 1119
S.D. 7537 8102 6050 8693 1317

(page 273)

Table 8.1 - cont.

Community/ Year Potato
(kg/ha)		 Oca
(kg/ha)		 Illaco
(kg/ha)		 Isaño
(kg/ha)		 Habas
(kg/ha)

Puna Ayllu

1985-86

N 57 46 8 1 32
Mean 8176 9255 5890 10018 1180
S.D. 8052 7223 7188 -- 1308

1986-87

N 66 34 5 0 34
Mean 8187 7757 3680 -- 1211
S.D. 6389 8189 2008 -- 1392
------ ------ ------ ------ ------ ------
T-stat -0.009 0.8665 0.98031 --- -0.0922

Both Years

N 123 80 13 1 66
Mean 8182 8618 5040 10018 1196
S.D. 7177 7635 5722 -- 1342

Total

Community/ Year Potato
(kg/ha)		 Oca
(kg/ha)		 Illaco
(kg/ha)		 Isaño
(kg/ha)		 Habas
(kg/ha)
N 240 156 42 9 117
Mean 8551 8269 5836 6892 1162
S.D. 7345 7849 5905 8216 1326

Community Comparisons (T-statistic):

1985-86 1.191 -1.494 -0.2548 --- N/A
1986-87 -0.0805 0.6711 -1.8622 --- 0.2404
Both Years 0.7980 -0.5686 0.5804 --- -0.3113

1 T-test calculated on log transformed variable.

2 Calculated using the unpooled variances T-test.

Notes

No values significant at p < .05