EFFECTS OF PLANTING DATE AND SPATIAL ARRANGEMENT ON COMMON BEAN (Phaseolus vulgaris) YIELD UNDER WEED-FREE AND WEEDY CONDITIONS

Abstract

-To evaluate the effect of planting date and spatial pattern on common bean yield under weed-free and weed-infested conditions, an experiment was conducted in Kelachay, Northern Iran, in 2013. The experimental design was a randomized complete block in a factorial arrangement with three replicates. Factors were planting date (10 August and 20 August), spatial pattern (square and rectangular planting pattern, with a planting distance of 30 x 30 cm and 45 x 20 cm, respectively), and weed management regime (weed-free and weedy conditions, weeded and not weeded throughout the growing season, respectively). Results showed that the main effect of planting date was significant only for pod number per plant and seed number per pod. At the same time, pod number per plant, seed number per pod, pod length, and grain yield were influenced significantly by spatial pattern. Results of ANOVA have also indicated that all traits, except pod length, were influenced significantly by weed-management regimes. Moreover, effect of planting date and spatial pattern were nonsignificant for weed dry weight. Mean comparison has expressed a significant increment in seed yield for square planting arrangement (1,055 kg ha ). Weeding has also presented an overall 12% and 8% improvement in grain and pod yield over control (weedy check), respectively. Based on the results of this study, weed control, as well as square planting pattern, are recommended for obtaining the highest seed yield in common bean. Palavras-chave: feijoeiro comum, competição, época de plantio, sistema de plantio, Phaseolus vulgaris. Keywords

The efficacy of weed management practices with crop geometries on growth, yield and economic viability of clusterbean [Cyamopsis tetragonoloba (L). Taub.] varieties

“…In case of B:C ratio; the interaction of 30 cm x 10 cm (S 1 ) and Imazethapyr 35% WG + Imazamox 35% WG (Pre-mix) @ 40 g a.i./ha (W 4 ) achieved significantly maximum B:C ratio (4.52); while lowest was recorded under interaction of 45 cm x 6.5 cm (S 2 ) with weedy situation (W 6 ) (-0.16). Results were also confirmed by findings of Esmaeilzadeh and Aminpanah (2015), Kebede et al (2015) and Pulok et al (2015).…”

Agronomic Practices to Increase the Yield and Quality of Common Bean (Phaseolus vulgaris L.): A Systematic Review

“…To achieve high yields in common bean crop, weed control is important because crop-weed competition can result in production losses ranging from 12 to 80% [223][224][225][226] and a deterioration in yield qualities too [227]. Not all weeds are equally perncious to yield; nevertheless, the broad-leaved weed species Amaranthus retroflexus L., Chenopodium album L. (Amaranthaceae), Portulaca oleracea L. (Portulacaceae), Datura stramonium L. (Solanaceae), Convolvulus arvensis L. (Convolvulaceae), the sedge species Cyperus esculentus L., Cyperus rotundus L. (Cyperaceae), and the grass weeds Cynodon dactylon (L.) Pers., Sorghum halepense (L.) Pers., Echinochloa crus-galli (L.) Beauv., Eleusine indica (L.) Gaertn., Setaria viridis (L.) P.…”

Periods of weed interference in cowpea crop in the semi-arid of Minas Gerais, Brazil

“…The reduction in grain yield due to weed interference throughout the cowpea cycle is quite variable in several studies, with values of 64% (Yadav et al, 2018), 66% (Gonzaga et al, 2018), 68% (Adigun et al, 2014) and up to 90% (Freitas et al, 2009). For phaseolus species, this same trend in reducing yield happens (Frenda et al, 2013;Esmaeilzadeh & Aminpanah, 2015;Odero & Wright, 2018). Therefore, the results of the present study show the importance of adjustments to local specificities, as the reduction in yield is dependent on several factors, such as weed community, cultivar, cultivation conditions and edaphoclimatic characteristics of each region.…”