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Contribution of Nutrients through Critical Irrigation from Diverse Water Sources in Selected Watersheds of Semi-arid Tropical India

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Relation http://oar.icrisat.org/6536/
 
Title Contribution of Nutrients through Critical Irrigation from Diverse Water Sources in Selected Watersheds of Semi-arid Tropical India
 
Creator Srinivasa Rao, Ch
Wani, S P
Sahrawat, K L
Jakkula, V S
Kundu, S
Rajashekar Rao, B K
Marimuthu, S
Pathak, P
Rajesh, C
Pardhasaradhi, G
 
Subject Soil Science
Watershed management
Agriculture-Farming, Production, Technology, Economics
 
Description Critical irrigation is one of the most important management options to protect the crop during
weather aberrations like dry spells at critical stages of the crop growth in semi arid condition. Various water
harvesting structures are useful in watershed areas to cope up with mid-season droughts. These structures provide
critical irrigations at sensitive crop growth stages by which they supply essential nutrients to some extent. We
estimated the contribution of various sources of water in terms of plant nutrients and to what extent critical
irrigations meet nutrient requirements of various crops. By giving 4 cm irrigation, the maximum major nutrient
(kg ha-1) addition in the studied watersheds is of the following order NO3 (5.2, Kothapalli); SO4 (15.2, Kolar); Na
(72.0, Haveri); K (3.6, Govardhanapura); Ca (38.5, Semli and Shyamapura); Mg (20.5, Kothapalli) and for
micronutrients (g ha-1) Fe (109, Kolar); Zn (40, Kothapalli); Mn (90, Kolar); Cu (120, ICRISAT) and B (190,
ICRISAT). Percentage of recommended dose of nutrients which can be met by three irrigations in cereal crops (5-
10, 15-100, 10-20% in N,S,K respectively); legumes (5-30,10-100, 5-10% of N,S,K respectively); cotton (10-15,
25-30, 5-10% of N,S,K, respectively) and micronutrients such as Fe, Zn, Mn, Cu and B to the full extent. With the
number of critical irrigations increased, application of secondary and micro nutrients should be avoided which
otherwise leads to higher cost of alleviation and environmental pollution.
 
Publisher The Indian Society of Dryland Agriculture
 
Date 2012
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/6536/1/InJAgricDev_27_1_58-69_2012.pdf
Srinivasa Rao, Ch and Wani, S P and Sahrawat, K L and Jakkula, V S and Kundu, S and Rajashekar Rao, B K and Marimuthu, S and Pathak, P and Rajesh, C and Pardhasaradhi, G (2012) Contribution of Nutrients through Critical Irrigation from Diverse Water Sources in Selected Watersheds of Semi-arid Tropical India. Indian Journal of Dryland Agriculture Research and Development, 27 (1). pp. 58-69. ISSN 0971-2062