Assessment of optimum sowing time based on heat indices and row spacing for summer guar
Abstract
A field experiment was conducted during summer seasons of 2013 to 2015 on clayey soil of Junagadh (Gujarat) to ascertain proper time of sowing (4th week of January, 2nd week of February and 4th week of February) and spacing (30 cm x 15 cm, 45 cm x 15 cm and 60 cm x 15 cm) in relation to growth and yield of guar [Cyamopsis tetragonoloba (L.) Taub.]. The results revealed that sowing in 2nd week of February enhanced growth and yield attributes viz., plant height, pods per plant and test weight and ultimately gave higher seed yield (1387 kg/ha) and stalk yield (2846 kg/ha) with higher growing degree days (GDD), helio thermal units (HTU), photo thermal units (PTU) and heat use efficiency (HUE) as well as higher net returns (` 42,051/ha) and B:C ratio (2.29) over early (4th week of January) and late (4th week of February) sowing. The results further indicated that 45 cm x 15 cm spacing promoted growth and yield attributes viz., plant height, branches per plant, pods per plant and test weight compared to 30 cm x 15 cm and 60 cm x 15 cm, which reflected in higher seed yield (1272 kg/ha) and stalk yield (2680 kg/ha) along with higher net returns (` 37,154/ha) and B:C ratio (2.03) over 30 cm x 15 cm and 60 cm x 15 cm spacing. Therefore, sowing in 2ndweek of February (when soil temperature >22.3ºC at 5 cm and >23.9ºC at 10 cm depth) and spacing of 45 cm x 15 cm could be appropriate for maximizing yield and monetary returns from summer guar under south Saurashtra agro-climatic conditions of Gujarat.
References
Angus, J.F., Cunningham, R.B.M., Moncur, W. and Mackenzie, D.H. (1981). Phasic development in field crops- thermal response in the seedling phase. Field Crop Res. 3: 365-378.
Bhadoria, R.B.S. and Chauhan, D.V.S. (1994). Response of clusterbean (Cyamopsis tetragonoloba) to date of sowing and spacing. Indian J. Agron. 39(1): 156-157.
Deshmukh, V., Arvadia, M.K. and Deshmukh, S.P. (2014a). Ideal sowing dates for summer clusterbean Cyamopsis tetragonoloba L. in south Gujarat. Trends in Biosci. 7(23): 3792-3794.
Deshmukh, V., Deshmukh, S.P. and Arvadia, M.K. (2014b). Effect of non-monetary and monetary agronomic manipulations on summer vegetable clusterbean Cyamopsis tetragonoloba L. Trends in Biosci. 7(23): 3900-3904.
Patel, I.C., Patel, M.M., Patel, A.G. and Tikka, S.B.S. (2004). Response of summer clusterbean [Cyamopsis tetragonoloba (L.) Taub.] varieties to time of sowing and row spacing on yield under north Gujarat agro-climatic condition. J. Arid Leg. 1(1): 24-26.
Sharma, S., Rawat, G.S., Sharma, R. and Mathukia, R.K. (2014). Effect of fertility levels and row spacing on growth and yield of some promising genotypes of clusterbean (Cyamopsis tetragonoloba). Agric. Sci. Digest 34(4): 316-318.
Siddaraju, R., Narayanaswamy, S., Ramegowda, Prasad, S.R. and Puttaraju, T.B. (2010). Influence of varieties and row spacings on seed yield and quality of cluster bean (Cyamopsis tetragonoloba L.). Mysore J. Agric. Sci. 44(3): 679-683.