sweetpotato            package:agricolae            R Documentation

_D_a_t_a _o_f _s_w_e_e_t_p_o_t_a_t_o _y_i_e_l_d

_D_e_s_c_r_i_p_t_i_o_n:

     The data correspond to an experiment with costanero sweetpotato
     made at the locality  of the Tacna department, southern Peru. The
     effect of two viruses (Spfmv and Spcsv)  was studied. The
     treatments were the following: CC (Spcsv) = Sweetpotato chlorotic 
     dwarf, FF (Spfmv) = Feathery mottle, FC (Spfmv y Spcsv) = Viral
     complex and OO  (witness) healthy plants. In each plot, 50
     sweetpotato plants were sown and 12 plots were employed.  Each
     treatment was made with 3 repetitions and at the end of the
     experiment the total  weight in kilograms was evaluated. The virus
     transmission was made in the cuttings  and these were sown in the
     field.

_U_s_a_g_e:

     data(sweetpotato)

_F_o_r_m_a_t:

     A data frame with 12 observations on the following 2 variables.

     '_v_i_r_u_s' a factor with levels 'cc' 'fc' 'ff' 'oo'

     '_y_i_e_l_d' a numeric vector

_S_o_u_r_c_e:

     Experimental field.

_R_e_f_e_r_e_n_c_e_s:

     International Potato Center. CIP - Lima Peru

_E_x_a_m_p_l_e_s:

     library(agricolae)
     data(sweetpotato)
     str(sweetpotato)

