S. Sarkar et al., SULFUR NUTRITION OF CROPS WITH AND WITHOUT ORGANIC MANURES UNDER INTENSIVE CROPPING, Indian Journal of Agricultural Sciences, 64(2), 1994, pp. 88-92
A field experiment was conducted during pre-rainy season, rainy season
(kharif) and winter season (rabi) of 1989-90 and 1990-91 to evaluate
the productivity and fertility building under intensive cropping of ri
ce (Oryza sativa L.)-potato(Solanum tuberosum L)-sesame (Sesamum indic
um L). The productivity of rice and potato was maximum where these cro
ps were fertilizer with 75% (N, P and K @ 45, 1 0 and 19 kg/ha for ric
e; 75, 33 and 62 kg/ha for potato) of the recommended doses of N, P (t
hrough single superphosphate) and K (60,13 and 25 kg/ha for rice; 100,
44 and 83 kg/ha for potato) in conjunction with farmyard manure @ 10
tonnes/ha. Sesame grown on residual fertility recorded maximum seed yi
eld (1.4 tonnes/ha) in the treatment receiving 75% of the recommended
fertilizer applied to both rice and potato along with incorporation of
crop residues of each crop in the sequence- Exclusion of single super
phosphate having 12% S either from potato or from rice reduced the pro
ductivity of all the 3 crops. Nutrient uptake was maximum where both r
ice and potato were fertilized with 100% of the recommended doses of N
, P (as single superphosphate) and K. Total N, and the available P, K
and S status of the soil improved when both rice and potato were ferti
lized with 75% of the recommended fertilizer along with farmyard manur
e @ 10 tonnes/ha or incorporation of crop residues. Negative balance o
f S was recorded under the treatments receiving no single superphospha
te, farmyard manum or crop residues. Application of farmyard manure @
10 tonnes/ha to both rice and potato in conjunction with 75% (N, P and
K @ 45. 10 and 19 kg/ha in rice; 75, 33 and 62 kg/ha in potato) of th
e recommended fertilizer was more remunerative than that of 100%.