alfalfa               package:faraway               R Documentation

_E_f_f_e_c_t_s _o_f _s_e_e_d _i_n_o_c_u_l_u_m, _i_r_r_i_g_a_t_i_o_n _a_n_d _s_h_a_d_e _o_n _a_l_f_a_l_f_a _y_i_e_l_d

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

     The 'alfalfa' data frame has 25 rows and 4 columns. Data comes
     from an experiment to test the effects of seed inoculum,
     irrigation and shade on alfalfa yield. A latin square design has
     been used.

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

     data(alfalfa)

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

     This data frame contains the following columns:

     '_s_h_a_d_e' Distance of location from tree line divided into 5 shade
          areas

     '_i_r_r_i_g_a_t_i_o_n' Irrigation effect divided into 5 levels

     '_i_n_o_c_u_l_u_m' Four types of seed incolum, A-D with E as control.

     '_y_i_e_l_d' Dry matter yield of alfalfa

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

     Petersen, R.G. 1994. Agricultural Field Experiments,         
     Design and Analysis. Marcel Dekker, Inc., New York.         Pages
     70-74. 1994

