Variability in meteorological parameters during kharif season and its impact on rice crop at Ludhiana, Punjab, India

Aerobic rice system is the method of cultivation, where the rice crop is established by direct seeding in un-puddle field. The grain yield of aerobic rice in aerobic situation realized by the farmers is still lower. Among many factors, seed rate and row spacing influence the grain yield of aerobic rice crop. The present investigation was carriedout to study the influence of seed rates and row spacing on grain yield of aerobic rice in aerobic situation, and field experiment was conducted at Rice Research Station, Bankura, West Bengal, India during kharif season of 2011 and 2012. The experimental results exhibited that the highest grain yield (3.40, 3.49 and 3.42 t ha-1 during kharif 2011, kharif 2012 and in pooled value, respectively) was recorded from treatment S2, where seed rate was 30 kg ha-1. Among the different row spacing, the maximum grain yield of 3.47, 3.45 and 3.46 t ha-1 during kharif season of 2011 and 2012 and on pooled basis was obtained with the treatment R1 i.e. 20 cm row spacing. The treatment combination of S2 (seed rate @ 30 kg ha-1) and R1 (20 cm row spacing) recorded the highest grain yield (4.01 t ha-1) of aerobic rice. It was established that the seed rate @ 30 kg ha-1 and 20 cm row spacing was promising for realizing best grain yield of aerobic rice in aerobic condition. It is an important eco-safety tool for tackling the climate change scenario.

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Study on weed flora in Major Kharif crops of ashoknagar district

Bhartiya Krishi Anusandhan Patrika ◽

10.18805/bkap77 ◽

2018 ◽

Vol 33 (01) ◽

Author(s):

B. S. Gupta ◽

Sudeep Singh Tomar ◽

V. K. Jain ◽

H. K. Trivedi ◽

Ajay Panika

Keyword(s):

Cynodon Dactylon ◽

Rice Crop ◽

Maize Crop ◽

Kharif Season ◽

Eclipta Alba ◽

Commelina Communis ◽

Weed Flora

A servey of weed flora studies in kharif season was conducted during year of 2017 major kharif crops were soybean blackgram, maize and rice crops of Ashok Nagar district. On the basis of result it was found that the Commelina bengalensis, Celosia argentia, Digra arvensis, Uphorbia jeniculata and Pathenium hysterophorus were the major weeds of soybean crops. Digra arvensis, Cynodon dactylon, Commelina bengalensis, Celosia argentia and Pathenium hysterophorus were the major weed of blackgram crops. Eichnoacloa crusgulli, Commelina communis, Cyprus Rotundus, Eichnoacloa, Colonum, and Eshemum, Rugosum were the major weeds of rice crop. Dactylectimium egyptium, Cynodon dectylon, Cyprus rotundus, Eclipta alba and Uhorbia hirta were the major weeds of maize crop in Ashoknagar district.

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Spatial analysis of rainfall variability and rainfed rice crop using GIS Technique in West Bengal (India)

MAUSAM ◽

10.54302/mausam.v68i2.631 ◽

2021 ◽

Vol 68 (2) ◽

pp. 287-298

Author(s):

P. K. SINGH ◽

L. S. RATHORE ◽

D. V. BHASKAR RAO ◽

K. K. SINGH ◽

A. K. Baxla ◽

...

Keyword(s):

West Bengal ◽

Rainfall Variability ◽

Crop Productivity ◽

Rice Crop ◽

Annual Rainfall ◽

Mean Annual Precipitation ◽

Growth Stages ◽

Kharif Season ◽

Dry Spells ◽

The Mean

The rainfed areas receive mean annual precipitation in range of 500-1500 mm with high degree of variability and are beset with problems of mid-season drought and associated impacts on the crop productivity. In this paper, analysis of weekly, monthly, annual rainfall and weekly rainfall probabilities in relation to crop productivity has been carried out for all the stations of the study area in West Bengal where rain-fed agriculture is predominant. However, duration of dry spells and its probabilities, climatic derivatives like commencement and cessation of rainy season, length of growing period (LGP) and estimates of water balance parameters have been carried out, in respect of all blocks in the identified three districts in West Bengal. The mean productivity during kharif season indicated that, highest productivity values of 3 to 3.5 t/ha are noticed in the block of central districts of Burdwan, Bankura, Birbhum, Hoogly districts. Perhaps, irrigation facilities in these districts might have helped in arriving at such high productivity rates. Low productivity of 1 to 1.5 t/ha have been noticed in two to three blocks of South 24-Paraganas and in Jalpaiguri districts. The productivity levels of northern districts, viz., Jalpaiguri, Coochbehar, West Dinajpur, South 24-Paranagas vary from 1.5 to 2.0 t/ha. The lowest productivity of 11.28 q /ha in Jaldha and 14.89 q /ha in Manbazar in 1996 can be due to heavy rainfall conditions in June and again in August. The mean productivity pattern of rice crop during kharif season in identified districts was analyzed with respect to occurrence of number of dry spells at different growth stages and average MAI values. The productivity was also related to monthly rainfall (July) and correlations have been mentioned for Jaldha block (0.22) and Manbazar block (0.64). The highest productivity of 2-3 t/ha are recorded in hot sub-humid to humid regions of West Bengal where LGP vary from 150 to 200 days. From the study of the probability of dry and wet spells and MAI during different crop phenophases, the most vulnerable phases can be identified in each region.

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