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Yield Maximization in Cassava through a Systematic Approach in Fertilizer Use

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Title Yield Maximization in Cassava through a Systematic Approach in Fertilizer Use
 
Creator K. Susan John , V. K. Venugopal & P. Saraswathi
 
Subject Critical levels, economic analysis, fertilizer optimization, field experimentation, greenhouse/screenhouse nutrient survey, preliminary soil analysis, sorption
 
Description Not Available
Maximum yield research (MYR) and maximum economic yield systems
(MEY) are important under the present situation of increased demographic changes,
which have reduced the per capita availability of both land and food. Among root
and tuber crops, cassava is found in a variety of production systems and performs
well under various levels of management from low-input to high-input systems. A systematic
approach in fertilizer use involves the determination and elimination of soil
nutrient constraints for balanced supply of all potentially deficient essential nutrients
for sustainable high yield. In the systematic approach of determining optimal fertilizer
for cassava (Manihot esculenta Crantz) in a Typic Kandiustult soil of Kerala, India,
studies on critical levels of nutrients, original nutritional status of the soil, its
sorption capacity, and greenhouse/screenhouse nutrient survey were carried out. The
critical levels of phosphorus (P) and potassium (K) were determined as 8.23 and
43.5 mg g21, respectively. The preliminary analysis of the soil of the experimental
site revealed the overall fertility status as very poor. The sorption studies conducted
for P, K, copper (Cu), zinc (Zn), manganese (Mn), sulfur (S), and boron (B)
indicated P, K, S, and B were limiting in this particular soil. The quantities of these
nutrients needed to optimize the soil nutrient status were determined from the preliminary
soil analysis, critical levels of nutrients, and sorption curves and found to be
136 mg mL21 P, 0.338 meq 100 mL21 K, 20 mg mL21 S, and 6.025 mg mL21 B,
respectively. From the greenhouse nutrient survey, N, P, K, and calcium (Ca) were
seen as limiting nutrients for this soil; therefore the optimum treatment for cassava
was fixed as N-P-K at 100:300:300 kg ha21, respectively. Field experiments were
conducted for two seasons with different levels of the optimum treatment using a
short duration (6–7 months) cassava variety, Sree Vijaya. The optimum treatment
gave a yield of 43.41 t ha21, whereas the yield under the existing practicerecommendations was 20–25 t ha21. Economic analysis showed this optimum treatment as the best in terms of highest gross return (Rs 1,31,125/-), net return (Rs 83,150/-), added return (Rs 70, 178/-), added profit (Rs 56,142/-), and benefit cost ratio (BCR) (2.73).
Not Available
 
Date 2021-08-04T06:24:32Z
2021-08-04T06:24:32Z
2007-03-19
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/52863
 
Language English
 
Relation Not Available;
 
Publisher Taylor &Francis