Page 48 - Agroforestry system - book inner (final corrected) - 9.-3-21_Neat

National level e-symposium on “Agroforestry system for augmenting livestock
productivity and empowering resource poor rural farmers”

South directions (East-West tree line divide farmlands into two aspects i.e. Northern and Southern and North-
South tree line divide into Eastern and western aspect). Further wheat varieties were intercropped in six
different spacings of polar i.e. 3×3m, 4×3m, 5×3m, 6×3m, 7×3m and 8×3m. The effect of poplar was studied
on wheat yield and on soil pH, EC, SOC, available N, P and K.

Results and Discussion
While effects on crop produce were limited for all wheat varieties with the increasing distance from tree
line, however, five years old poplar planted on field bunds exhibited significant reduction up to 3 m in grain
yield of wheat from tree line for all the wheat varieties. The highest available soil N (210.5 kg ha ), P (15.3
–1
kg ha ) and K (280.2 kg ha ) were recorded near tree line at a distance of 2 m. Poplar based AFS had better
–1
–1
available nutrients status in comparison to sole wheat crop. The lowest value of soil pH (7.8) was recorded
under 5 × 3 m spacing after harvesting of wheat crop. The decrease in EC was maximum (46%) under 5 × 3 m
spacing followed by 4×3m, 5×3m, 6×3m, 7×3m and 8×3m spacing. SOC accumulation rates increased with
the decrease in tree spacing and were maximum (0.69%) under 5 × 3 m spacing. The higher values for NPK
near tree base and closed spacing may be attributed to better micro-climatic conditions under tree canopy. To
optimize the provisioning service of poplar windbreak AFS, the cultivation of highly shade tolerant wheat
variety HD-2967 is recommended over other wheat varieties under poplar windbreak AFS.

References
Bangarwa, K.S., & Wuehlisch, G.V. (2009). Using exotic poplar in northern India for higher returns in
agroforestry. Asia-Paci Agrofor. New., 35, 3-5.
Chauhan, S.K., Brar, M.S., & Sharma, R. (2012). Performance of poplar (Populus deltoides Bartr.) and its
effect on wheat yield under agroforestry system in irrigated agro-ecosystem, India. Casp. J. Env. Scie.,
10, 53-60.
Gill, R.I.S., Singh, B., Kaur, N., & Luna, R.K. (2007). Evaluation of crops in poplar plantation with three
spacing in two row directions. Indian Forester, 133, 45-57.
Sirohi, C., Rao, O.P., & Rana, B.S. (2012). Varietal comparison of wheat and paddy under Populus deltoides
based agri-silvicultural system in sodic soil. Indian Journal of Forestry, 35, 291-294.

S1-6

Effect of domestic sewage water and nutrients on soil available nutrients grown
with fodder cowpea

C.Vennila and Dr.T.Ananthi
Assistant Professor
Department of Agronomy, Madras Veterinary College, Chennai 7

Introduction

As water is the limiting resource, rationalization of reuse of waste water especially domestic waste in
agricultural productivity needs to be considered. However, the availability of hazardous elements may limit
its usage but as an advantage, the availability of nutrients may be tapped for enhancing productivity with safer

Institute of Animal Nutrition, Centre for Animal Production Studies, TANUVAS
National Bank for Agriculture and Rural Development 29