Bari Brahmana, India
Bari Brahmana, India

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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.


Gupta V.,AICRP for Dryland Agriculture | Sharma A.,AICRP for Dryland Agriculture | Sharma A.,Central Institute of Temperate Horticulture | Kumar J.,AICRP for Dryland Agriculture | And 3 more authors.
Bangladesh Journal of Botany | Year: 2014

A pronounced residual effect of organic and inorganic fertilizers, applied in maize crop was observed on yields of maize-gobhi sarson cropping system. The experiment was conducted with 10 treatments of N, P, K, FYM, crop residue and zinc sulphate nutrients. The highest growth, yield and yield components of maize crop were recorded with 100% recommended fertilizer dose-RFD + ZnSO4 20 kg/ha and the grain yield (2409 kg/ha) was about 101% higher over the control. In case of gobhi sarson, the highest seed yield (1081 kg/ha) was observed as a pronounced residual effect of 10 t/ha FYM in preceding maize crop; which was about 81% higher over the control. The treatments where 50% N was substituted by FYM and crop residue in maize crop had the best reflection in enhancing the seed yield of gobhi sarson to the tune of 74 and 70% over the control and 16 and 13% over farmer's practice. The highest rain water use efficiency (RWUE) and heatuse efficiency (HUE) was recorded in treatment 100% RFD + ZnSO4 20 kg/ha in maize crop and 10 t/ha FYM in gobhi sarson.


Gupta V.,AICRP for Dryland Agriculture | Singh M.,AICRP for Dryland Agriculture | Kumar A.,AICRP for Dryland Agriculture | Sharma B.C.,AICRP for Dryland Agriculture | Kher D.,AICRP for Dryland Agriculture
Legume Research | Year: 2014

Field experiment was conducted to find out the effect of pre plant incorporation (PPI), pre (PE) and post-emergence (POE) herbicides along with cultural weed control and weedy check on yield, yield attributes of urdbean crop (Uttara) under rainfed conditions. Twelve treatments consisting of one PPI (Chlorimuron ethyl), one PE (Pendimethalin), four POE herbicides (Imazathypr, Quizalofop ethyl, Fenoxaprop ethyl and Chlorimuron ethyl) along with hand weeding at 20 and 40 days after sowing and weedy check (control) and weed free treatment were tested in randomized block design. The results revealed that significant reduction in total weed density and weed biomass were observed in weed free treatment, two hand weedings (20 and 40 DAS) and Imazathypr 40 & 25 g/ha at 20 DAS which were at par; and significantly superior than weedy check treatment and hence resulted in significant improvement in yield attributing characters viz. plant height, branches/plant, pods/ plant, grains/pod, seed and straw yield than the other treatment combinations and weedy check treatment during the period under study. Grain yield obtained with Imazathypr (POE) 40 and 25 g/ ha 20 DAS was 45.4 and 39.0 per cent higher over the control. Maximum crop growth rate (CGR) was observed in weed free, HWs followed by Imazathypr (POE) 40 and 25 g/ha at 20 DAS to the tune of 3.3, 3.3, 3.0 and 2.8 g/m2/day. The grain and straw yield and yield attributes were highly negatively correlated with weed infestation and weed biomass.

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