- Nitrogen fertilization in oat (Avena sativa) varieties

Singh. V., K!!okar, J. S., Joshi, Y. P. and Verma, S. S. 1985. Effect of dates of sowing and cutting management on the forage yield of oat varieties. Forage research 11 :45-49.

Indian J. Agron. 38 (2) :31 1-3 13 (June 1993)Influence of genotypes and plant densities on physiological parameters,

grain yield and quality of soybean (Glycine max)

R. A. K. College of Agriculture, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Sehore,

Madkya Pradesh 466 001 Received: February 1992

A field experiment in split-plot design was Carried out on medium heavy black soil of Sehore during rainy season of 1990, to evaluate the performance of 6 varieties of soybean [Glycine mar (L.)Merr.] in main plots and 4 plant population levels in sub- plots replicated 3 times. The soil had 148.3,

4 and 445 kgha available N, P and K respectively. The pH was 7.9. Total rainfall received during the crop season was 1,291.2 mm.The crop was sown on 28 June 1990, keeping row-to-row distance of 45 cm. Plant population of 0.2, 0.4, 0.6 and 0.8 million plantdha was maintained by thinning. A basal dose 'of N, P20, and qO @ 20, 60 20 kgha was also added at the time of sowing.

Before sowing, the seeds were treated with Thiram @ 3 g and Rhizobium culture @ 5 glkg seed.

The varietal response on plant height and brancheslplant was significant, whereas response on dry weight was not significant. Physiological growth parameters like leaf- area index, crop-growth rate and net assimilation rate were significant (Table 1). 'JS 81-335' gave significantly higher grain yield than the other varieties except 'JS 81- 1619'. The highest yield of 'JS 81-335' may' be attributed to better branches, grain yield/ plant, optimum leaf-area index (5.9), highest crop-growth rate (21.6 g/m2/day) and highest net assimilation rate (0.22 mg/cm2/day).