Abstract
A 6-year study was conducted to compare the influence of 1,1′-dimethyl-4,4′-bipyridinium ion (paraquat), a mixture of paraquat and 2-chloro-4,6-bis(ethylamino)-s-triazine (simazine), frequent mowing, hay mulch, and cultivation on growth, yield, and nutrition of peach (Prunus persica(L.) Batsch ‘Jerseyland’) trees. The growth and yield of trees which received two annual applications of paraquat or one application of paraquat plus simazine were comparable to those of trees maintained under cultivation or hay mulch. Hay mulched and cultivated trees responded comparably. Hay mulched trees had higher leaf potassium (K) and lower leaf magnesium (Mg) than the other trees. Where grass was controlled only by mowing, trees were generally lower in nitrogen (N), made less growth, and produced less fruit.
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