Thumbnail Image

Anand Agricultural University, Anand

Anand Agricultural University (AAU) was established in 2004 at Anand with the support of the Government of Gujarat, Act No.(Guj 5 of 2004) dated April 29, 2004. Caved out of the erstwhile Gujarat Agricultural University (GAU), the dream institution of Sardar Vallabhbhai Patel and Dr. K. M. Munshi, the AAU was set up to provide support to the farming community in three facets namely education, research and extension activities in Agriculture, Horticulture Engineering, product Processing and Home Science. At present there seven Colleges, seventeen Research Centers and six Extension Education Institute working in nine districts of Gujarat namely Ahmedabad, Anand, Dahod, Kheda, Panchmahal, Vadodara, Mahisagar, Botad and Chhotaudepur AAU's activities have expanded to span newer commodity sectors such as soil health card, bio-diesel, medicinal plants apart from the mandatory ones like rice, maize, tobacco, vegetable crops, fruit crops, forage crops, animal breeding, nutrition and dairy products etc. the core of AAU's operating philosophy however, continues to create the partnership between the rural people and committed academic as the basic for sustainable rural development. In pursuing its various programmes AAU's overall mission is to promote sustainable growth and economic independence in rural society. AAU aims to do this through education, research and extension education. Thus, AAU works towards the empowerment of the farmers.

Browse

2000 - 20042
Reset filters
Subject: Agronomy × Author: Patel, Vimalkumar J. × End date: 2009 × Start date: 2000 ×
Reset filters

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    ThesisItemOpen Access
    Impact of herbicidal mixtures on weeds, maize as well as their residual effect on succeeding crops
    (AAU, Anand, 2004) Patel, Vimalkumar J.; Upadhyay, P. N.
    Atrazine, alachlor, metolachlor each @ 1.0 kg/ha, metribuzin @ 0.30 kg/ha and pendimethalin @ 0.50 kg/ha and their feasible combinations applied at half of the rate and compared with weed free (HW at 20 & 40 DAS) and weedy check treatments in a field investigation carried out at the College Agronomy Farm of Gujarat Agricultural University, Anand on maize crop during Kharif season of the year 2001-2002 and 2002-2003 to study the impact of herbicidal mixtures on weeds, maize as well as their residual effect on succeeding crops. The soil of the experimental field was loamy sand in texture having good drainage capacity. The soil was low in organic carbon and available nitrogen, while medium in available phosphorus and high in available potassium. The experiment was laid out in a Randomized Block Design with four replications. All the recommended agronomic practices were adopted to raise the crop. The findings of the present investigation indicated that Eleusine indica, Digitaria sanguinalis, Eragrostis major and Dactyloctenium aegxjptium as monocot and Digera arvensis, Phyllanthus niruri, Boerhavia diffusa and Euphorbia hirta as dicot weeds were completely controlled by the mixture of either atrazine (0.50 kg/ha) with pendimethalin (0.25 kg/ha) or alachlor (0.50 kg/ha) and weed free (twice hand weeding carried out at 20 & 40 DAS), while mixture of atrazine (0.50 kg/ha) with metolachlor (0.50 kg/ha) completely controlled Digera arvensis, Phyllanthiis niruri, Boerhavia dijfusa and Euphorbia hirta upto critical period. Application of alachlor or metolachlor each @ 1.0 kg/ha or metribuzin @ 0.30 kg/ha was found inferior but their mixtures with either atrazine or pendimethalin performed better and gave excellent control of weeds. Pre emergence application of atrazine (0.50 kg/ha) with metribuzin (0.15 kg/ha) did not give complete control of Eleusine indica and Digitaria sanguinalis. Alachlor (0.50 kg/ha) in conjunction with metolachlor (0.50 kg/ha) failed to gave effective control of Digera arvensis, Phyllanthus niruri, Boerhavia, dijfusa as well as Euphorbia hirta but excellent for monocot weeds. Further, metiibuzin appUed @ 0.30 kg/ha did not exert their effect on control of monocot weeds. Minimum dry weight of weeds (34.64 kg/ha) was recorded under combined application of atrazine (0.50 kg/ha) and pendimethalin (0.25 kg/ha) with the highest WCE (98.96 %) closely followed by weed free treatment and tank mix application of atrazine either with alachlor or metolachlor with more than 93 per cent WCE. Application of metribuzin @ 0.30 kg/ha was found toxic, which had significantly reduced the plant stand, plant height as well as all the yield attributes resulting into reduced grain and stover yields. Maximum plant height, girth and length of cob, number of grains/cob, test weight, grain and stover yields and protein content of grain were obtained under pre emergence application of atrazine (0.50 kg/ha) with pendimethalin (0.25 kg/ha) and weed free treatment followed by atrazine in conjunction with either alachlor or metolachlor (each @ 0.50 kg/ha). Weedy conditions throughout the crop season reduced the grain yield by 46.77 per cent over weed free treatment. The levels of nitrate nitrogen in the surface soil was significantly higher under application of pendimethalin @ 0.50 kg/ha closely followed by mixtures of atrazine (0.50 kg/ha) in conjunction with pendimethalin (0.25 kg/ha) at 0 and 10 day. Minimum plant nutrients removed by weeds (0.21, 0.07 and 0.30 kg N, P and K/ha, respectively) was observed under tank mix application of atiazine + pendimethalin @ 0.50 + 0.25 kg/ha, while maximum nutrients uptake by grain (41.49,18.03 and 23.60 kg N, P and K/ha, respectively) and stover (31.42 and 15.70 kg N and P/ha, respectively) was noticed under weed free treatment and higher potash uptake by stover (50.21 kg/ha) was noted under atrazine + pendimethalin @ 0.50 + 0.25 kg/ha. None of the herbicides applied alone or as mixtures at tested rates had adverse effect on succeeding Rabi crops viz., oat, sorghum, mustard and chickpea. The highest net return was obtained under tank mix application of atrazine with either pendimethalin (Rs. 15831/ha) or alachlor (Rs. 15779/ha) and weed free condition (Rs. 15687/ha). The mixtures of ati-azine with alachlor gave the highest CBR of 2.78 followed by atrazine with pendimethalin (2.71), alachlor with pendimethalin (2.68) arid weed free (2.66).
  • Thumbnail Image
    ThesisItemOpen Access
    EFFECT OF NITROGEN LEVELS AND WEED MANAGEMENT PRACTICES IN Kharif PEARLMILLET
    (AAU, Anand, 2000) Patel, Vimalkumar J.; Sadhu, A. C.
    A field experiment was conducted at the college agronomy farm, B. A. college of Agriculture, Anand Campus, Anand, to find out the "EFFECT OF NITROGEN LEVELS AND WEED MANAGEMENT PRACTICES IN Kharif PEARLMILLET" during Kharif season of 1999. The soil of the experimental plot was loamy sand in texture having good drainage with 7.8 pH. The experiment was laid out in a factorial randomized block design with three replications. Eighteen treatment combinations comprising three levels of nitrogen (40, 80 and 120 kg/ha) and six weed management practices (atrazine @ 0.50 kg/ha PE, atrazine @ 0.75 kg/ha PE, atrazine @ 0.50 kg/ha PE + IC at 30 DAS, atrazine @ 0.50 kg/ha PE + HW at 30 DAS, hand weedings at 15 & 30 DAS and weedy check). The results indicated that increase in nitrogen application increase the dry weight of weeds at harvest significantly. Treatment of 80 kg N/ha (N2) was at par with 120 kg N/ha (N3) in respect of monocot weeds count at 30 DAS, dicot weeds count at 60 DAS and at harvest. Dry weight of monocot, dicot and total weeds at harvest were significantly highest under treatment of 40 kg N/ha (N1). Successive increase in nitrogen application from 40 to 120 kg N/ha increased growth and yield attributes but significant differences were found up to 80 kg N/ha. Application of 80 kg N/ha significantly increased plant height, number of effective tillers per plant, length of earhead, protein content in grains as well as grain and straw yields as compared to 40 kg N/ha. However, plant height and straw yield were significantly increased with increased in nitrogen application up to 120 kg N/ha. Weed management practices significantly lower down the monocot, dicot and total weeds count at 30 and 60 DAS and at harvest. Treatment of atrazine @ 0.75 kg/ha was found to be the superior in reducing monocot, dicot and total weeds (1.10, 1.36 and 2.47/m2, respectively) at 30 DAS. However, treatment of application of (atrazine @ 0.50 kg/ha + HW at 30 DAS) (W4) was recorded significantly the lowest counts of monocot, dicot and total weeds at harvest (0.88, 0.84 and 1.71/m2 at 60 DAS and 1.03, 1.07 and 2.10/m2, respectively). The treatment W4 also recorded significantly the lowest dry weight of monocot, dicot and total weeds (3.78, 7.44 and 11.22 kg/ha, respectively) with 97.4 % weed control efficiency. Growth and yield attributes of pearlmillet crop was also significantly influenced by weed management practices. Treatment of two HW at 15 and 30 DAS (W5) recorded significantly higher plant height (91.24 cm) at 30 DAS than rest of the treatment except treatment W4, while the treatment W4 (atrazine @ 0.50 kg/ha + HW at 30 DAS) recorded significantly higher plant height (228.77 and 231.62 cm, respectively) at 60 DAS and at harvest than rest of the treatments except treatment W5. Treatment W4 (atrazine @ 0.50 kg/ha + HW at 30 DAS) significantly increased number of effective tillers per plant and length of earhead than rest of the treatments except W5. While treatment W5 (HW at 15 and 30 DAS) increased the internodes per plant, test weight, protein content of grains and grain and straw yields as compared to other treatments. During the course of investigation, interaction effect N x W revealed that treatment combination N3W2 at 30 DAS and N2W4 at 60 DAS and at harvest recorded significantly the lowest monocot, dicot and total weeds. Further it was foimd significant in respect to some growth and yield attributes also. Treatment combination N2W5 recorded the highest plant height at 30 DAS (97 cm), while N3W4 was found significantly superior at 60 DAS and at harvest recording plant height of 253.86 and 255.20 cm, respectively. The treatment combinations N2W4 and N3W4 recorded maximum length of earheads (20.40 cm) and protein content of grains (14.03 %), respectively. However, the interaction effect N x W was found not significant for grain and straw yields of pearlmillet crop. Looking to the economics of various treatment combinations, N2W4 realized maximum net profit (Rs. 23823) as well as CBR (1:3.18). Application of 80 kg N/ha (N2) recorded higher net realization (Rs.16088 /ha) and highest CBR values (1:2.63), while weed management practices treatment W4 recorded maximum net realization (Rs. 21491 /ha) and CBR values (1:2.95).