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Gupta V.,AICRP for Dryland Agriculture | Singh M.,AICRP for Dryland Agriculture | Kumar J.,AICRP for Dryland Agriculture | Kumar A.,AICRP for Dryland Agriculture | And 2 more authors.
Indian Journal of Agricultural Sciences | Year: 2014

An experiment was undertaken during rabi 2008-09 and 2009-10 at Agronomy Research Farm, PRSS, Samba, SKUAST-J to find out the heat use efficiency of chickpea (Cicer arietinum L.) crop with different weed control treatments, viz. T1: weedy check; T2: Hand-weeding (HW) at 25-30 and 50-55 DAS; T3: Quizalofop-ethyl 40 g/ha at 20 DAS; T4: Quizalofop-ethyl 40 g/ha at 30 DAS; T5: Quizalofop-ethyl 50 g/ha at 20 DAS; T6: Quizalofop-ethyl 50 g/ha at 30 DAS; T7: Imazethapyr 25 g/ha at 20 DAS; T8: Imazethapyr 25 g/ha at 30 DAS; T9: Imazethapyr 40 g/ha at 20 DAS; T10: Imazethapyr 40 g/ha at 30 DAS; T11: Chlorimuron ethyl 4 g/ha at 20 DAS and T12: Chlorimuron ethyl 4 g/ha at 30 DAS evaluated in randomized block design with three replications under rainfed situations. Chickpea is a thermo-sensitive winter season crop. Heat use efficiency was computed at one month interval after sowing. The results revealed that heat use efficiency was found maximum at 90 DAS in chickpea crop. The heat use efficiency was found highest under hand-weeding at 25-30 and 50-50 DAS, however, the lowest values were found when herbicide Chlorimuron was used @ 4 g/ha at 30 DAS. The dry matter and seed yield are significantly differed among different weed control treatments. The heat use efficiency was found linearly (R2= 0. 70) related with dry matter accumulation at different days after sowing. The grain yield and biological yield heat use efficiency was found 0. 33 and 0. 90 kg/ha °C/day, respectively. The dry matter was found to be directly related to seed yield of chickpea crop with R2= 0. 98. Source


Nandan B.,Pulses Research Sub Station | Sharma B.C.,Pulses Research Sub Station | Kumar A.,Pulses Research Sub Station | Nagar K.C.,Pulses Research Sub Station
Legume Research | Year: 2013

Field experiments were conducted at Dryland Research Sub-station, Rakh Dhainsar, Sher-e-Kashmir University of Agricultural Sciences and Technology, Jammu to study the effect of mustard and on the productivity of maize intercropping system in moisture deficit sub-tropical areas of Jammu and Kashmir. Initially the experiment was laid out in a randomized block design with four mustard based intercropping systems as experimental treatments during rabi of 2008-09 and by keeping the rabi imposed intercropping systems as main plot treatments, four new maize based intercropping systems as sub-plot treatments with four replications. The maize from intercropping system of maize+ cowpea preceded by mustard+ fieldpea registered statistical higher grain and stover yield as that recorded under sole maize preceded by mustard based intercropping systems and it was also produced more number of gains/cob and 1000-grain weight than other intercropping systems preceded by mustard based intercropping systems. Higher nutrient removal by maize was also recorded in maize+ cowpea preceded by mustard+ fieldpea system. Source


Gupta V.,Pulses Research Sub Station | Singh M.,Pulses Research Sub Station | Kumar J.,Pulses Research Sub Station | Kumar A.,Pulses Research Sub Station | And 2 more authors.
Legume Research | Year: 2012

An experiment was conducted in randomized block design with twelve treatments replicated thrice during the rabi seasons of 2008-09 and 2009-10 in Inceptisols. The objective of the experiment was to study the effect of different post emergence (POE) herbicides to manage weeds in chickpea variety GNG 469 along with hand weeding (HW) at 25-30 and 50-55 days after sowing (DAS) and weedy check. Higher seed yield and yield attributes were obtained with 2 HW at 25-30 and 50-55 DAS and it was statistically at par with the POE application of imazathypr 40 & 25 g/ha at 30 DAS. Post emergence application of Quizalofop-ethyl @ 50 & 40 g/ha at 20 and 30 DAS also obtained significant values of yield and yield attributes which were superior to weedy check but the values were not at par with imazathypr treatment. Higher values of weed control efficiency (WCE) at 70 DAS (94.3 %) and at harvest (87.2 %) and minimum values of weed biomass (6.54 and 7.04 g/m2 at 70 DAS and at harvest) were recorded with 2 HW at 25-30 and 50-55 DAS followed by POE application of imazathypr 40 and 25 g/ha at 30 DAS. The lowest values of yield and yield attributes and higher values of weed biomass were obtained with weedy check both at 70 DAS and at harvest. Source

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