000			02008nab a22003017a 4500
001			G69023
003			MX-TxCIM
005			20230516185644.0
008			121211b |||p||p||||||| |z||| |
022			_a1467-9868
022			_a1369-7412 (Online)
024			_2https://doi.org/10.1111/j.2517-6161.1964.tb00535.x
040			_aMX-TxCIM
041			_aeng
090			_aREP-1305
100	1		_aPatterson, H.D. _930064
245	1	0	_aTheory of cyclic rotation experiments
260			_c1964. _aUnited Kingdom : _bWiley,
340			_aPrinted
520			_aThe paper reviews some of the statistical problems arising in the design and analysis of long-term cyclic experiments comparing different crop rotations. Three types of design are distinguished and their properties considered. These are basic designs with all phases of the rotations in each block, reduced designs with mutually exclusive groups of phases kept in separate blocks and phase-confounded designs in which some contrasts between test crops are partially confounded with block differences. Methods of analysing the yields of test crops by estimating the mean effects of the rotations over the years and regressions on seasonal and time variates are discussed theoretically for replicated experiments of basic or reduced design. The analysis is complicated by correlations between yield values recurring on the same plots and by lack of homogeneity in residual year-to-year variations in rotation effects. The main topics considered are (1) the estimation of errors, (2) the losses of information due to using unweighted means and regressions ignoring the correlations, (3) methods for recovering this information.
546			_aText in English
595			_aRPC
650		7	_2AGROVOC _91807 _aCrop rotation
650		7	_2AGROVOC _91313 _aYields
650		7	_2AGROVOC _94432 _aExperimentation
773	0		_tJournal of the Royal Statistical Society Series B _gv. 26, no. 1, p. 1-45 _dUnited Kingdom : Wiley, 1964. _x1467-9868
942			_cJA _2ddc
999			_c19672 _d19672