Rainfall situation vs yields in the domain of experiment
The monthly rainfall data from 2017-2018 to 2019-20 for the Ananthapuramu district is shown in Table 3. The crop growing season of pigeonpea during 2017-18 was experienced by deficient in rainfall with a negative rainfall deviation of 60.2%. From planting to harvest, the crop had a deficiency rainfall with a negative deviation ranging from 19.3 to 95.9%. Despite the fact that there was a quantitative shortfall in rainfall, the amount received was adequate for pigeon pea to produce a larger yield than farmer practise and district average yields.
While the average annual rainfall in 2018-19 was 559.8 mm, which was greater than the domain area’s usual rainfall (495.8 mm). Further, the distribution of rainfall was quite uneven and unfavourable for the growth and development of the pigeonpea. Crop was experienced sufficient moisture during the juvenile vegetative phase though it deviated from normal rainfall. An excessive amount of rainfall was coincided during peak flowering to pod development stage (
i.e., September and October months) with excess relative humidity packed with high wind velocity congenial for the spread of mite incidence leads to poor plant yield of pigeon pea packed with maruca and pod borer incidence later on deficit rainfall during the November and December months crop experiences the dry spell leads to meagre harvests where quantity rainfall doesn’t matter.
Further during 2019-20 received deficit rainfall from opening of window to the harvest, but the quantum of distribution matters and that eventually fetches the yields. Though the rains were deficit in June and July soaking rain of 20-30mm is sufficient to germinate and sustain further to a period of flowering. In spite of stress at vegetive stage excess rainfall later on
viz., September and October lures the soil profile to saturate and support the pigeon pea for sufficient vegetative growth and luxurious flowering later on received rains pinch is higher than the normal also utilised by the crop as a common old age proverb every drop count matters in drylands. Here the same matched with thepigeonpea yield added a step ahead yield of big basket of produce among the three years of study period too.
Adoption gap
Partial adoption gaps were identified for fertilizer application and pest management. Full adoption gap was identified for variety, seed rate, intra plant spacing and seed treatment. No adoption gap was identified in sowing time presented in Table 2. The findings revealed that farmers need to be educated to fill the adoption gaps, which are to an extent partial to full gaps through demonstrations in the cluster approach
(Jyothi and Subbaiah, 2019).
Seed yield
The potential yield of demonstrated variety under rainfed conditions was 15-18 q/ha, whereas under irrigated conditions was 22.5-25 q/ha. The demonstrated variety was recorded highest yield
viz., 596, 224 and 581 respectively compared to farmers practice (530, 184 and 523 kg ha
-1) in all the study period and increase in yield was 12.5, 21.7 and 11.1 per cent during 2017-18 to 2019-20 respectively (Table 4). The variety LRG-52 resulted superior on yield in comparison with LRG-41 (local check) in different years, it might clearly indicate that the adoption of appropriate technology, variety LRG-52 and timely management practices increases yield of pigeonpea and these outcomes were in conformity with the study conducted by
(Urre et al., 2019).
During 2018-19 recorded lower yields over other two years which might be due to unfavourable environmental conditions
viz., high rainfall during flowering stage leads to the flower drop. Excessive amount of rainfall was coincided during peak flowering to pod development stage (
i.e., September and October months) with excess of relative humidity packed with high wind velocity congenial for the spread of mite incidence leads to poor plant yield of pigeon pea packed with maruca and pod borer incidence later on deficit rainfall during the November and December months crop experiences the dry spell leads to lowest yield among the study period. In all the years, demonstrated variety showed higher yield compared to farmers variety and it ranged from 11.1 to 21.7 per cent.
Economics analysis
Economic returns were observed to be a function of yield. The sale price of pigeon pea was considered according to minimum support price of that crop in that year. Gross returns of cluster frontline demonstration on pigeon pea from the recommended practice (CFLD’s) were 32482 Rs ha
-1, 12712 Rs ha
-1 and 33698 Rs ha
-1 respectively compared to farmers practice of 28885, 10442, 30334 Rs ha
-1 during 2017-18, 2018-19 and 2019-20 respectively. The net returns were 17982 Rs ha
-1, 6902 Rs ha
-1, 16198 Rs ha
-1 compared to 14635 Rs ha
-1, 4542 Rs ha
-1, 11584 Rs ha
-1 during 2017-18, 2018-19 and 2019-20 respectively. It was observed that additional gain ranged from 2360-4614 Rs ha
-1 in recommended practice proved to be beneficial in respect of yield and economics of pigeon pea in consecutive years and blocks of Ananthapuramu. Further it was also documented that demonstrated yield was higher than average yield of district, which was performed with crop cutting experiment by Department of Agriculture (Table 5). The average yield of district was 525 kg ha
-1, 65 kg ha
-1 and 193 kg ha
-1 during 2017-18, 2018-19 and 2019-20 respectively.
Technology gap
The technology gap is the difference between potential yieldand demonstration yield. The major technological gaps regarding recommended varieties, seed quality, sowing time, fertilizer dosage, fertilizer application method and plant protection measures were observed. The technology gap was recorded 904 kg/ha, 1376 kg/ha and 919 kg/ha during 2017-18, 2018-19 and 2019-20 respectively. During different years the disparity in technology gap may be attributed to more viability of preferred technologies, differential pattern of rainfall over different years.
Extension gap
The extension gap is the difference between the demonstration yield and farmers practice yield. The extension gap was recorded 66 kg/ha, 40 kg/ha and 61 kg/ha from 2017-18 to 2019-20 respectively (Table 5). The extension gap between 40 to 66 kg/ha during the study period illustrated the necessity to instruct farmers.
Technology index
The technology index is technology gap divided by potential yield and multiplied by 100. The technology index was recorded 60.2, 91.7 and 61.0 from 2017-18 to 2019-20 respectively (Table 5). The technology index was between 60.2 to 91.7 during the study period was illustrated the necessity to instruct farmers.