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Modeling of Interactive Effects of Rainfall, Evaporation, Soil Temperature, and Soil Fertility for Sustainable Productivity of Sorghum + Cowpea and Cotton + Black Gram Intercrops under Rotation Trials in a Rain-Fed Semi-arid Vertisol

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Title Modeling of Interactive Effects of Rainfall, Evaporation, Soil Temperature, and Soil Fertility for Sustainable Productivity of Sorghum + Cowpea and Cotton + Black Gram Intercrops under Rotation Trials in a Rain-Fed Semi-arid Vertisol
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Creator G. R. MARUTHI SANKAR,
V. SUBRAMANIAN,
K. L. SHARMA,
P. K. MISHRA,
S. JYOTHIMANI,
K. BHASKAR,
D. JAWAHAR,
M. RAJESWARI
T. TAGHAVAN
G. RAVINDRA CHARY
A. RENUKA DEVI,
K. A. GOPINATH,
B. VENKATESWARLU,
J. KUSUMA GRACE
 
Subject dryland, soil temperature, nutrient management treatments.
 
Description Not Available
Long-term effects of the different combinations of nutrient-management treatments were
studied on crop yields of sorghum + cowpea in rotation with cotton + black gram.
The effects of rainfall, soil temperature, and evaporation on the status of soil fertility
and productivity of crops were also modeled and evaluated using a multivariate
regression technique. The study was conducted on a permanent experimental site of
rain-fed semi-arid Vertisol at the All-India Coordinated Research Project on Dryland
Agriculture, Kovilpatti Centre, India, during 1995 to 2007 using 13 combinations of
nutrient-management treatments. Application of 20 kg nitrogen (N) (urea) + 20 kg N
[farmyard manure (FYM)] + 20 kg phosphorus (P) ha−1 gave the greatest mean grain
yield (2146 kg ha−1) of sorghum and the fourth greatest mean yield (76 kg ha−1) of
cowpea under sorghum + cowpea system. The same treatment maintained the greatest
mean yield of cotton (546 kg ha−1) and black gram (236 kg ha−1) under a cotton +
cowpea system. When soil fertility was monitored, this treatment maintained the greatest
mean soil organic carbon (4.4 g kg−1), available soil P (10.9 kg ha−1), and available
soil potassium (K) (411 kg ha−1), and the second greatest level of mean available soil
N (135 kg ha−1) after the 13-year study. The treatments differed significantly from each
other in influencing soil organic carbon (C); available soil N, P, and K; and yield of
crops attained under sorghum + cowpea and cotton + black gram rotations. Soil temperature
at different soil depths at 07:20 h and rainfall had a significant influence on the
status of soil organic C. Based on the prediction models developed between long-term
Received 7 April 2010; accepted 17 July 2011.
Address correspondence to K. L. Sharma, Division of Resource Management, Central Research
Institute for Dryland Agriculture, Santhoshnagar, P. O. Saidabad, Hyderabad 500 059, India. E-mail:
klsharma@crida.ernet.in
756
Effect of Nutrient Treatments on Crop Productivity 757
yield and soil fertility variables, 20 kg N (urea) + 20 kg N (FYM) + 20 kg P ha−1
could be prescribed for sorghum + cowpea, and 20 kg N (urea) + 20 kg N (FYM)
could be prescribed for cotton + black gram. These combinations of treatments would
provide a sustainable yield in the range of 1681 to 2146 kg ha−1 of sorghum, 74 to
76 kg ha−1 of cowpea, 486 to 546 kg ha−1 of cotton, and 180 to 236 kg ha−1 of black
gram over the years. Beside assuring greater yields, these soil and nutrient management
options would also help in maintaining maximum soil organic C of 3.8 to 4.4 g
kg−1 soil, available N of 126 to 135 kg ha−1, available soil P of 8.9 to 10.9 kg ha−1,
and available soil K of 392 to 411 kg ha−1 over the years. These prediction models for
crop yields and fertility status can help us to understand the quantitative relationships
between crop yields and nutrients status in soil. Because black gram is unsustainable,
as an alternative, sorghum + cowpea could be rotated with c
Not Available
 
Date 2020-03-05T08:40:26Z
2020-03-05T08:40:26Z
2011-07-17
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/33582
 
Language English
 
Relation Not Available;
 
Publisher Not Available