Application of Rainfall-Potential Evapotranspiration Model for Determining Optimum Planting Date of Yam &lt;i&gt;(Dioscorea rotundata&lt;/i&gt;) in a Tropical Wet-and-Dry Climate

Eruola, A. O.; Bello, N. J.; Ufoegbune, G. C.; Makinde, A. A.

doi:10.5923/j.plant.20120202.07

Cited by 7 publications

(7 citation statements)

References 2 publications

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“…Although reasons for this could not be identified it can be assumed that the late planting was a major contributor to low yields. Eruola et al (2012) reported lower yields in two consecutive years from later planted yams compared with earlier planted yams at Abeokuta, a site not far from Ibadan. For water yam (D. alata L.) Marcos et al (2011) found lowest yields from latest plantings.…”

Section: Yam Yield and Soil Chemical Properties And Planting Datementioning

confidence: 88%

Yam tuber and maize grain yield response to cropping system intensification in south-west Nigeria

Enesi

Häuser

Lopez-Montez

et al. 2017

Archives of Agronomy and Soil Science

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Four factorial trials were conducted with yam (Dioscorea rotundata Poir.) at Ibadan, Nigeria from 2013 to 2015, investigating effects of (1) tillage ( 2) fertilizer ( 3) intercropping ( 4) yam plant densities. Yam tuber yields varied between years (2013: 16.44 Mg ha −1 ; 2014: 10.08 Mg ha −1 ; 2015 26.61 Mg ha −1 ). In 2013 neither tillage nor fertilizer affected tuber yields. In 2014 tillage increased yields (+25.4%, P < 0.0001), fertilizer reduced yield (−10.5%; P = 0.0046). In 2015 tillage increased tuber yields by 8.1% (ns), fertilizer application increased yield (+17.5%, P = 0.0017). Across the years, tuber yields increased (P < 0.01) with increasing yam density with a constant increase in 2013 up to the highest density, yet yields leveled out above 14,815 plants ha −1 in 2014 and 2015. Intercropping with maize (66,667 plants ha −1 ) reduced tuber yield by 42.62% in 2013, 44.52% in 2014 and 30.68% in 2015 (P < 0.01 all years) across all yam densities. Maize grain yield was higher in sole crop in 2 years. Fertilizer increased yields in all years (P < 0.0001). Maize yield had no response to the yam densities. Ridging had a negative effect on grain yield in 2015 (−0.3 Mg ha −1 , P = 0.0002).Increasing plant density appears a safe measure to increase yam yields.

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Section: Yam Yield and Soil Chemical Properties And Planting Datementioning

confidence: 88%

Yam tuber and maize grain yield response to cropping system intensification in south-west Nigeria

Enesi

Häuser

Lopez-Montez

et al. 2017

Archives of Agronomy and Soil Science

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“…Another issue with early planting, especially at the beginning of the rainy season, is the probability of having a poor crop establishment if the rains are irregular. Dry spells during the early growth stages of yam have led to low ware yam production in many yam-growing areas of Nigeria (Eruola et al, 2012). Late planting may result in reduced crop duration and tuber yield.…”

Section: Introductionmentioning

confidence: 99%

The influence of minisett size and time of planting on the yield of seed yam (Dioscorea Rotundata)

et al. 2020

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In traditional yam (Dioscorea spp.) production systems in West Africa, finding sole seed yam producers is rare and up to 30% of harvested tubers from the ware tuber crop is reserved to plant an equivalent area of the harvested crop during the next season. Many farmers typically must make a trade-off between food and seed in the use of available tubers. A study was carried out using a factorial experiment in a randomised complete block design to investigate the influence of planting different minisett sizes at different planting periods on the yield of seed yam with the aim of improving the availability of this expensive input and saving more ware tubers for food or sale. Results showed that by doubling or tripling the minisett size from 30 to 60 or 90 g, yields of seed yam increased by 61.1 and 103.3%, respectively. The 90 g minisetts had the highest values for all traits studied but had the least sett multiplication ratio. The early planted crop yielded 137% more than the late-planted crop. Significant interactions between minisett size, planting period and season were found. In 2016, although the highest yield of seed tubers was from early planted 90 g minisetts (35.6 t ha−1), the yield of early planted 30 g minisetts (23.8 t ha−1) was similar to those of 60 g planted mid-season (28.7 t ha−1) and 90 g planted late (20.0 t ha−1). To produce a high proportion of seed size tubers with less planting material, early planting of 30 g minisetts is recommended. Such practice will enhance seed tuber availability and food security by saving 1–2 t ha−1 of tubers that would have been used as seed instead of food.

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“…The variability of moisture-based agro-meteorological indices is the most important element for yam production in the humid tropics [17] . For instance, late onset of rain, dry spells after planting, sprouting and the emergence of yam crop limit leaf development hence, leaf area index (LAI) and the affect tuber bulking period which largely determines tuber yield in yam [17] .…”

Section: Yam Production and Rainfall Effectiveness Indicesmentioning

confidence: 99%

Precipitation Effectiveness and Yam Production in Kwara State, Nigeria

Olanrewaju

Tilakasiri

Salami

2022

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Insufficiency in the production of food crops in Nigeria has been linked with variation in rainfall features. This paper examined the impacts of variation in rainfall onsets, cessations and length of growing season on yam yield in Kwara State, Nigeria to proffer a solution to the problem of food insecurity in the state. Rainfall data were collected monthly for six stations in Kwara State between 1961-2017 (57 years). Yam yield data were also collected for the same period. Since no separate record of yam is kept for each climatic station, mean climatic data were calculated to match the yam yield record obtained from the above stations. Rainfall onset, cessation and Length of Growing Season (LGS) were calculated from monthly values. Decadal partitioning of both the crop and rainfall features was made to show variations. Time series analysis was employed to study trends. The strength of the relationship between the length of the growing season and yam yield was also conducted using correlation analysis. The result showed an upward trend of onset of rain coupled with a downward trend in late cessation of rain and a decline in the length of the growing season. On a decadal basis, increasing frequency of delayed onset of rain and late cessation was observed. Length of growing season exhibits a positive (r = 0.455**) relationship with yam yield. Suggestions were made on how to attain sustainable efficient yam cropping in the study area.

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Application of Rainfall-Potential Evapotranspiration Model for Determining Optimum Planting Date of Yam <i>(Dioscorea rotundata</i>) in a Tropical Wet-and-Dry Climate

Cited by 7 publications

References 2 publications

Yam tuber and maize grain yield response to cropping system intensification in south-west Nigeria

Yam tuber and maize grain yield response to cropping system intensification in south-west Nigeria

The influence of minisett size and time of planting on the yield of seed yam (Dioscorea Rotundata)

Precipitation Effectiveness and Yam Production in Kwara State, Nigeria

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