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Table 9. Estimated production functions for potato of adopters and nonadopters.<br />

Independent<br />

variable<br />

Constant<br />

LAREA<br />

LFR<br />

Dummy 1<br />

Dummy 4 -0.514"<br />

(-1.633)<br />

= 0.62<br />

Adopter Nonadopter<br />

Notes: 1. The dependent variable is <strong>the</strong> potato production (kg) per farm.<br />

2. Figures in Paren<strong>the</strong>sis are t-values of <strong>the</strong> estimated coefficients.<br />

3. ****Significant at 1 % level; *** significant at 5% level; "*<br />

significant at 10% level; and * significant at l5 % level.<br />

4. Definitions of independent variables: LAREA = log value of land<br />

area in hectares; LFR = log value of total fertilizer cost per hectal-e<br />

in SLR; Dunlmy 1 = with site = 1; without site = 0: Dunlmy 3 =<br />

irrigation once in 2 years = 0; continuous irrigation = 1; and<br />

Dummy 4 = owner operator = 1; tenant = 0.<br />

5. F-value of <strong>the</strong> chow test is 3.41***.<br />

m,

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